Unprecedented new details of medieval cities hidden under jungle in Cambodia near Angkor Wat have been revealed using lasers, archaeologists said Sunday, shedding new light on the civilisation behind the world's largest religious complex.

While the research has been going on for several years, the new findings uncover the sheer scale of the Khmer Empire's urban sprawl and temple complexes to be significantly bigger than was previously thought.

The research, drawing on airborne laser scanning technology known as lidar, will be unveiled in full at the Royal Geographic Society in London on Monday by Australian archaeologist Damian Evans.

"We always imagined that their great cities surrounded the monuments in antiquity," Evans told AFP.

"But now we can see them with incredible precision and detail, in some places for the very first time, but in most places where we already had a vague idea that cities must be there," he added.

Angkor Wat, a UNESCO World Heritage site seen as among the most important in southeast Asia, is considered one of the ancient wonders of the world.

It was constructed from the early to mid 1100s by King Suryavarman II at the height of the Khmer Empire's political and military power and was among the largest pre-industrial cities in the world.

But scholars had long believed there was far more to the empire than just the Angkor complex.

The huge tranch of new data builds on scans that were made in 2012 that confirmed the existence of Mahendraparvata, an ancient temple city near Angkor Wat.

But it was only when the results of a larger survey in 2015 were analysed that the sheer scale of the new settlements became apparent.

To create the maps, archaeologists mounted a special laser on the underneath of a helicopter which scans the area and is able to see through obstructions like trees and vegetation.

Much of the cities surrounding the famed stone temples of the Khmer Empire, Evans explained, were made of wood and thatch which has long rotted away.

"The lidar quite suddenly revealed an entire cityscape there with astonishing complexity," he said.

"It turned out we'd been walking and flying right over the top of this stuff for ten years and not even noticing it because of the vegetation."

Among the new scans already published are a detailed map of a huge city complex surrounding the stone temple known as Preah Khan of Kompong Svay, a series of iron smelting sites dating back to the Angkor era and new information on the complex system of waterways that kept the region running.

The new data also maps out the full extent of Mahendraparvata, information that will make future digs much more accurate and less time consuming.

"What we had was basically a scatter of disconnected points on the map denoting temple sites. Now it's like having a detailed street map of the entire city," Evans said.

Further maps will be published in the coming months, he added.

Long Kosal, a spokesman for the Apsara authority, the government body that manages the Angkor complex, said the lidar had uncovered "a lot of information from the past."

"It shows the size and information about people living at those sites in the past," he told AFP, adding further research was now needed to capitalise on the finds.

While the Khmer Empire was initially Hindu it increasingly adopted Buddhism and both religions can be seen on display at the complex.

Angkor is visited by hundreds of thousands of visitors a year and remains Cambodia's top tourist attraction.

For more information see the >Cambodian Archaeological Lidar Initiative website.

Author: Suy Se | Source: AFP [June 12, 2016]

From the Old Coal Station to the Modern Housing Complex

In many cities of the world directly in the city center there are the power stations. However, in London are going to transform old power station into quite modern multipurpose complex.

In London practically in city center directly on the bank of Thames there is an old coal power station. Because the such awful smoking monster is absolutely bad for center of London, the old station was been closed. And now, plan to convert this place into a multipurpose complex where will be: luxury apartments, hotels, showrooms, cafe, fitness clubs, fashion boutiques etc.

Modern London Apartments

Architectural company «Rafael Viñoly Architects» has received the grant from «The UK's Commission for Architecture and the Built Environment» on creation of the project of reorganization of old coal factory in the center of London in a modern multipurpose complex.
This power station, certainly, will remain, as a history monument. Here there will be the 1st non-polluting energy office-center. Thus, power station will still develop energy, truth, now by means of solar batteries and wind turbines.

Round this building will the whole micro-district of new infrastructure: modern offices, new shops, sports arenas. Besides it, in plan to create the new station of the London underground. An excellent example of the modern utilization of the old infrastructural projects.

The Center of Industrial London

It has long puzzled scientists why, after 3 billion years of nothing more complex than algae, complex animals suddenly started to appear on Earth. Now, a team of researchers has put forward some of the strongest evidence yet to support the hypothesis that high levels of oxygen in the oceans were crucial for the emergence of skeletal animals 550 million years ago.

The new study is the first to distinguish between bodies of water with low and high levels of oxygen. It shows that poorly oxygenated waters did not support the complex life that evolved immediately prior to the Cambrian period, suggesting the presence of oxygen was a key factor in the appearance of these animals.

Lead author Dr Rosalie Tostevin completed the study analyses as part of her PhD with UCL Earth Sciences, and is now in the Department of Earth Sciences at Oxford University. She said: 'The question of why it took so long for complex animal life to appear on Earth has puzzled scientists for a long time. One argument has been that evolution simply doesn't happen very quickly, but another popular hypothesis suggests that a rise in the level of oxygen in the oceans gave simple life-forms the fuel they needed to evolve skeletons, mobility and other typical features of modern animals.

'Although there is geochemical evidence for a rise in oxygen in the oceans around the time of the appearance of more complex animals, it has been really difficult to prove a causal link. By teasing apart waters with high and low levels of oxygen, and demonstrating that early skeletal animals were restricted to well-oxygenated waters, we have provided strong evidence that the availability of oxygen was a key requirement for the development of these animals. However, these well-oxygenated environments may have been in short supply, limiting habitat space in the ocean for the earliest animals.'

The team, which included other geochemists, palaeoecologists and geologists from UCL and the universities of Edinburgh, Leeds and Cambridge, as well as the Geological Survey of Namibia, analysed the chemical elemental composition of rock samples from the ancient seafloor in the Nama Group - a group of extremely well-preserved rocks in Namibia that are abundant with fossils of early Cloudina, Namacalathus and Namapoikia animals.

The researchers found that levels of elements such as cerium and iron detected in the rocks showed that low-oxygen conditions occurred between well-oxygenated surface waters and fully 'anoxic' deep waters. Although abundant in well-oxygenated environments, early skeletal animals did not occupy oxygen-impoverished regions of the shelf, demonstrating that oxygen availability (probably >10 micromolar) was a key requirement for the development of early animal-based ecosystems.

Professor Graham Shields-Zhou (UCL Earth Sciences), one of the co-authors and Dr Tostevin's PhD supervisor, said: 'We honed in on the last 10 million years of the Proterozoic Eon as the interval of Earth's history when today's major animal groups first grew shells and churned up the sediment, and found that oxygen levels were important to the relationship between environmental conditions and the early development of animals.'

The research, based on fieldwork carried out in the Nama Group in Namibia, is published in the >journal Nature Communications.

Source: University College London [September 23, 2016]

A large complex used for food preparation, distribution and storage facilities plus an “intriguing device” for keeping track of the 30-day lunar calendar were investigated during the latest excavations in the islet of Geronisos off Paphos.

The complex was built along the southern edge of the island during the final years of Ptolemaic-Egyptian rule on Cyprus, the antiquities department said.

It said that four weeks of excavations had just been completed with a focus on the complex used for food preparation, distribution and storage facilities built along the southern edge of the island.

The excavations were carried out by the New York University Geronisos Island Expedition under the direction of Joan Breton Connelly. An international team of senior staff members and students excavated within the island sanctuary of Apollo, just opposite Agios Georgios tis Pegeias.

The rubble of a wall with an associated plaster floor was unearthed, dated to the first century BC Excavations also revealed fine Hellenistic pottery deposited up against this wall, including a skyphos-bowl of “Koan-Knidian” type, produced in local materials. Eight Chalcolithic pounder stones, a mortar and flints found on the floor give evidence of Hellenistic reuse of Chalcolithic tools, the department said.

During the four weeks, Professor Jolanta Mlynarczyk of the University of Warsaw continued her study of Geronisos pottery, while Dr Mariusz Burdajewicz worked on his publication of the Geronisos glass finds.

Dr Alaria Bultrighini of University College London began her study of a rare stone parapegma unearthed on Geronisos, “an intriguing device” for keeping track of the 30-day lunar calendar. Dr Paul Croft of the Lemba Archaeological Field Station supervised excavations within the Central South Complex and continued his study of the Geronisos animal bones. Architect Richard Anderson undertook a 3-D digital survey of the island’s architectural remains the department said.

“The 2015 season included new and important work on the mainland opposite Geronisos where a surface survey was undertaken, stretching from Maniki Harbor at the south to the acropolis of Agios Georgios tis Pegeias at the north,” it added.

The relationship of Geronisos to the mainland settlement is now a major focus of the work, it said.

Geronisos, also known as ‘Holy Island’, due to its remoteness from the mainland has preserved its treasures. The 12,000 square metre rock, flourished during the late Hellenistic period and its soil has produced coins, pottery, glass objects, inscriptions and important architectural remains.

The New York University archaeological mission has suggested that the island appeared to have been devastated by an earthquake during approximately the 1st century B.C and life returned to the island again during the 6th century A.D, when a reservoir and animal shelters were constructed.

Source: Cyprus Mail [July 29, 2015]

The name Stonehenge is full of mysteries. It is probably the most famous prehistoric monument, and also the monument about which the most myths and legends have been created. For the first time in the world, an exhibition is being shown about the fascinating cult complex Stonehenge and its surrounding landscape including the latest research findings on the much bigger and older stone circle at Durrington Walls – this is at MAMUZ Museum Mistelbach.

In the exhibition Stonehenge. A Hidden Landscape, original finds will be on display which have never before left the British Isles. Gigantic stone models in original size which can be touched, original stones like the ones used in the cult complex, and also digital animations on the surrounding landscape transport visitors to the mystical world of our ancestors more than 4,000 years ago. But a long time before Stonehenge there were even bigger monumental structures in Europe, in particular in the Weinviertel region: the circular enclosures. Discover a piece of the religious world of our ancestors – Stonehenge is close enough to touch.

True-to-scale reconstructions of the stone circle based on 3D laser scan data let visitors to MAMUZ experience the magnificence and dimension of this cult monument without having to travel to the cult site itself. Elaborate visualisations give a three-dimensional impression of the landscape surrounding Stonehenge so that visitors are able to imagine the stone circle and also picture all of the fascinating cult monuments in the extensive surrounding area. At the location west of London, in Wiltshire, the large numbers of visitors and the preservation of the site mean it is not possible to enter the stone circle directly or to touch the stones. In the exhibition at Museum Mistelbach, visitors are really “in the thick of it” thanks to visualisations and reproductions and they can also touch original bluestones and sarsen stones as used to build the complex.

The exhibition also links Stonehenge with the prehistory of the province of Lower Austria. Long before the first stones were put in place at Stonehenge, the first monumental structures appeared in Central Europe. The impressive discoveries of these circular enclosures, which are distributed throughout Lower Austria and especially in the Weinviertel region, are shown alongside the fascinating original exhibits of the so-called Bell Beaker culture, which demonstrates the transition from the Stone Age to the Bronze Age in Lower Austria.

Working together with renowned cooperation partners, academics from Austria and abroad and also experts in exhibition design and multimedia presentation, MAMUZ is showing the first ever exhibition about Stonehenge. The exhibition is being realised in cooperation with the Niederösterreichische Landessammlungen, Ludwig Boltzmann Institute, 7reasons, atelier cremer and the University of Birmingham.

Stonehenge: A Hidden Landscape opens on 20th March 2016 and will run until 27 Nov. 2016.

Source: MAMUZ Museum Mistelbach [March 03, 2016]

Mammals immortalise their genes through eggs and sperm to ensure future generations inherit good quality mitochondria to power the body's cells, according to new UCL research.

Before now, it was not known why mammals rely on dedicated sex cells that are formed early in development (a germline) to make offspring whereas plants and other simple animals, such as corals and sponges, use sex cells produced later in life from normal body tissues.

In a new study, published today in >PLOS Biology and funded by Natural Environment Research Council, Engineering & Physical Sciences Research Council and the Leverhulme Trust, UCL scientists developed an evolutionary model to investigate how these differences evolved over time and discovered that the germline in mammals developed in response to selection on mitochondria (the powerhouses of cells).

First author and UCL PhD student, Arunas Radzvilavicius, said: "There have been many theories about why mammals have a specialised germline when plants and other ancient animals don't. Some suggest it was due to complexity of tissues or a selfish conflict between cells. The distinction between sex cells and normal body tissues seems to be necessary for the evolution of very complex specialised tissues like brain.

"Surprisingly, we found that these aren't the reason. Rather, it's about the number of genetic mutations in mitochondrial DNA over time, which differs between organisms, and the variation between cells caused by the mitochondria being randomly partitioned into daughter cells at each division."

In plants, mitochondrial mutations creep in slowly, so a germline isn't needed as mutations are corrected by natural selection. Mitochondrial variation is maximised by forming the next generation from the same cells used to make normal tissue cells. When the cells divide to form new daughter cells, some receive more mutant mitochondria than others and these cells are then removed through natural selection, preserving the reproductive cells containing higher quality mitochondria.

In mammals, genetic errors in mitochondria accumulate more quickly due to our higher metabolic rate so using cells that have undergone lots of division cycles would be a liability. Mitochondria are therefore only passed along to the next generation through a dedicated female germline in the form of large eggs. This protects against errors being introduced as eggs undergo many fewer replication cycles than cells in other tissues such as the gut, skin and blood.

The germline ensures that the best quality mitochondria are transferred but restricts the genetic variation in the next generation of cells in the developing embryo. This is corrected for by mammals generating far too many egg cells which are removed during development. For example, humans are born with over 6 million egg-precursor cells, 90% of which are culled by the start of puberty in a mysterious process called atresia.

Senior author, Dr Nick Lane (UCL CoMPLEX and Genetics, Evolution & Environment) added: "We think the rise in mitochondrial mutation rate likely occurred in the Cambrian explosion 550 million years ago when oxygen levels rose. This was the first appearance of motile animals in the fossil record, things like trilobites that had eyes and armour plating - predators and prey. By moving around they used their mitochondria more and that increased the mutation rate. So to avoid these mutations accumulating they needed to have fewer rounds of cell division, and that meant sequestering a specialized germline."

Co-author, Professor Andrew Pomiankowski (UCL Genetics, Evolution & Environment), concluded: "Without a germline, animals with complex development and brains could not exist. Scientists have long tried to explain the evolution of the germline in terms of complexity. Who would have thought it arose from selection on mitochondrial genes? We hope our discovery will transform the way researchers understand animal development, reproduction and aging."

Source: University College London [December 20, 2016]

By comparing the genes of current-day North and South Americans with African and European populations, an Oxford University study has found the genetic fingerprints of the slave trade and colonization that shaped migrations to the Americas hundreds of years ago.

The study published in Nature Communications found that:

• While Spaniards provide the majority of European ancestry in continental American Hispanic/Latino populations, the most common European genetic source in African-Americans and Barbadians comes from Great Britain.

• The Basques, a distinct ethnic group spread across current-day Spain and France, provided a small but distinct genetic contribution to current-day Continental South American populations, including the Maya in Mexico.

• The Caribbean Islands of Puerto Rico and the Dominican Republic are genetically similar to each other and distinct from the other populations, probably reflecting a different migration pattern between the Caribbean and mainland America.

• Compared to South Americans, people from Caribbean countries (such as the Barbados) had a larger genetic contribution from Africa.

• The ancestors of current-day Yoruba people from West Africa (one of the largest African ethnic groups) provided the largest contribution of genes from Africa to all current-day American populations.

• The proportion of African ancestry varied across the continent, from virtually zero (in the Maya people from Mexico) to 87% in current-day Barbados.

• South Italy and Sicily also provided a significant European genetic contribution to Colombia and Puerto Rico, in line with the known history of Italian emigrants to the Americas in the late 19th and early 20th century.

• One of the African-American groups from the USA had French ancestry, in agreement with historical French immigration into the colonial Southern United States.

• The proportion of genes from European versus African sources varied greatly from individual to individual within recipient populations.

'We found that the genetic profile of Americans is much more complex than previously thought,' said study leader Professor Cristian Capelli from the Department of Zoology.

The research team analysed DNA samples collected from people in Barbados, Columbia, the Dominican Republic, Ecuador, Mexico, Puerto Rico and African-Americans in the USA.

They used a technique called haplotype-based analysis to compare the pattern of genes in these 'recipient populations' to 'donor populations' in areas where migrants to America came from.

'We firstly grouped subsets of people in Africa and Europe who were genetically similar and used this fine scale resolution to find which combinations of these clusters resulted in the sort of mixtures that we now see in people across the Americas', said the study's first author, Dr Francesco Montinaro from the Department of Zoology.

'We can see the huge genetic impact that the slave trade had on American populations and our data match historical records', said study author Dr Garrett Hellenthal from the UCL Genetics Institute, 'The majority of African Americans have ancestry similar to the Yoruba people in West Africa, confirming that most African slaves came from this region. In areas of the Americas historically under Spanish rule, populations also have ancestry related to what is now Senegal and Gambia. Records show that around a third of the slaves sent to Spanish America in the 17th Century came from this region, and we can see the genetic evidence of this in modern Americans really clearly.'

These genetic findings also uncover previously unknown migration. ‘We found a clear genetic contribution from the Basques in modern-day Maya in Mexico’, said Professor Capelli. ‘This suggests that the Basque also took part in the colonisation of the Americas, coming over either with the Spanish conquistadores or in later waves of migration’.

'The differences in European ancestry between the Caribbean islands and mainland American population that we found were also previously unknown. It is likely that these differences reflect different patterns of migration between the Caribbean and mainland America.'

'These results show just how powerful a genetic approach can be when it comes to uncovering hidden patterns of ancestry. We hope to use the same approach to look at other populations with diverse genetic contributions, such as Brazilians,' said Professor Capelli.

Source: University of Oxford [March 24, 2015]

Hot vents on the seabed could have spontaneously produced the organic molecules necessary for life, according to new research by UCL chemists. The study shows how the surfaces of mineral particles inside hydrothermal vents have similar chemical properties to enzymes, the biological molecules that govern chemical reactions in living organisms. This means that vents are able to create simple carbon-based molecules, such as methanol and formic acid, out of the dissolved CO2 in the water.

The discovery, published in the journal Chemical Communications, explains how some of the key building blocks for organic chemistry were already being formed in nature before life emerged - and may have played a role in the emergence of the first life forms. It also has potential practical applications, showing how products such as plastics and fuels could be synthesised from CO2 rather than oil.

"There is a lot of speculation that hydrothermal vents could be the location where life on Earth began," says Nora de Leeuw, who heads the team. "There is a lot of CO2 dissolved in the water, which could provide the carbon that the chemistry of living organisms is based on, and there is plenty of energy, because the water is hot and turbulent. What our research proves is that these vents also have the chemical properties that encourage these molecules to recombine into molecules usually associated with living organisms."

The team combined laboratory experiments with supercomputer simulations to investigate the conditions under which the mineral particles would catalyse the conversion of CO2 into organic molecules. The experiments replicated the conditions present in deep sea vents, where hot and slightly alkaline water rich in dissolved CO2 passes over the mineral greigite (Fe3S4), located on the inside surfaces of the vents. These experiments hinted at the chemical processes that were underway. The simulations, which were run on UCL's Legion supercomputer and HECToR (the UK national supercomputing service), provided a molecule-by-molecule view of how the CO2 and greigite interacted, helping to make sense of what was being observed in the experiments. The computing power and programming expertise to accurately simulate the behaviour of individual molecules in this way has only become available in the past decade.

"We found that the surfaces and crystal structures inside these vents act as catalysts, encouraging chemical changes in the material that settles on them," says Nathan Hollingsworth, a co-author of the study. "They behave much like enzymes do in living organisms, breaking down the bonds between carbon and oxygen atoms. This lets them combine with water to produce formic acid, acetic acid, methanol and pyruvic acid. Once you have simple carbon-based chemicals such as these, it opens the door to more complex carbon-based chemistry."

Theories about the emergence of life suggest that increasingly complex carbon-based chemistry led to self-replicating molecules - and, eventually, the appearance of the first cellular life forms. This research shows how one of the first steps in this journey may have occurred. It is proof that simple organic molecules can be synthesised in nature without living organisms being present. It also confirms that hydrothermal vents are a plausible location for at least part of this process to have occurred.

The study could also have a practical applications, as it provides a method for creating carbon-based chemicals out of CO2, without the need for extreme heat or pressure. This could, in the long term, replace oil as the raw material for products such as plastics, fertilisers and fuels.

This study shows, albeit on a very small scale, that such products, which are currently produced from non-renewable raw materials, can be produced by more environmentally friendly means. If the process can be scaled up to commercially viable scales, it would not only save oil, but use up CO2 - a greenhouse gas - as a raw material.

Source: University College London [April 27, 2015]

Researchers have used complex image analysis to uncover annotations that were hidden for nearly 500 years between the pages of England's oldest printed bible.

The annotations were discovered in England's first printed Bible, published in 1535 by Henry VIII's printer. It is one of just seven surviving copies, and is housed inLambeth Palace Library, London. The secrets hidden in the Lambeth Library copy were revealed during research by Dr Eyal Poleg, a historian from Queen Mary University of London.

"We know virtually nothing about this unique Bible -- whose preface was written by Henry himself -- outside of the surviving copies. At first, the Lambeth copy first appeared completely 'clean'. But upon closer inspection I noticed that heavy paper had been pasted over blank parts of the book. The challenge was how to uncover the annotations without damaging the book" said Dr Poleg.

Dr Poleg sought the assistance of Dr Graham Davis, a specialist in 3D X-ray imaging at QMUL's School of Dentistry. Using a light sheet, which was slid beneath the pages, they took two images in long exposure -- one with the light sheet on and one with it off.

The first image showed all the annotations, scrambled with the printed text. The second picture showed only the printed text. Dr Davis then wrote a novel piece of software to subtract the second image from the first, leaving a clear picture of the annotations.

The annotations are copied from the famous 'Great Bible' of Thomas Cromwell, seen as the epitome of the English Reformation. Written between 1539 and 1549, they were covered and disguised with thick paper in 1600. They remained hidden until their discovery this year. According to Dr Poleg, their presence supports the idea that the Reformation was a gradual process rather than a single, transformative event.

"Until recently, it was widely assumed that the Reformation caused a complete break, a Rubicon moment when people stopped being Catholics and accepted Protestantism, rejected saints, and replaced Latin with English. This Bible is a unique witness to a time when the conservative Latin and the reformist English were used together, showing that the Reformation was a slow, complex, and gradual process."

The annotations were written during the most tumultuous years of Henry's reign. The period included the move away from the Church of Rome, The Act of Supremacy, the suppression of the monasteries, and the executions of Anne Boleyn, Thomas More, and John Fisher, as well as the Pilgrimage of Grace, which moved Henry to a more cautious approach.

Dr Poleg was also able to trace the subsequent life of the book, after the point at which Latin Bibles had definitively fallen out of use. On the back page he uncovered a hidden, handwritten transaction between two men: Mr William Cheffyn of Calais, and Mr James Elys Cutpurse of London. Cutpurse, in medieval English jargon, means pickpocket. The transaction states that Cutpurse promised to pay 20 shillings to Cheffyn, or would go to Marshalsea, a notorious prison in Southwark. In subsequent archival research, Dr Poleg found that Mr Cutpurse was hanged in Tybourn in July 1552.

"Beyond Mr Cutpurse's illustrious occupation, the fact that we know when he died is significant. It allows us to date and trace the journey of the book with remarkable accuracy -- the transaction obviously couldn't have taken place after his death," said Dr Poleg.

He added: "The book is a unique witness to the course of Henry's Reformation. Printed in 1535 by the King's printer and with Henry's preface, within a few short years the situation had shifted dramatically. The Latin Bible was altered to accommodate reformist English, and the book became a testimony to the greyscale between English and Latin in that murky period between 1539 and 1549.

"Just three years later things were more certain. Monastic libraries were dissolved, and Latin liturgy was irrelevant. Our Bible found its way to lay hands, completing a remarkably swift descent in prominence from Royal text to recorder of thievery."

Source: University of Queen Mary London [March 15, 2016]

Early Earth was an inhospitable place where the planet was often bombarded by comets and other large astrophysical bodies.

Some of those comets contained complex prebiotic materials, such as amino acids and peptides (chains of amino acids), which are some of the most basic building blocks of life on Earth.

“The survivability of these compounds under impact conditions is mostly unknown,” said Lawrence Livermore’s Nir Goldman, who recently received a NASA grant to continue his astrobiology research. “Our research hopes to answer these questions and give an indication for what types of potentially life-building compounds would be produced under these conditions.”

Basically, Goldman is trying to figure out if life on Earth really did come from out of this world.

Goldman’s early research found that the impact of icy comets crashing into Earth billions of years ago could have produced a variety of small prebiotic or life-building compounds. His work using quantum simulations predicted that the simple molecules found in comets (such as water, ammonia, methanol and carbon dioxide) could have supplied the raw materials, and the impact with early Earth would have yielded an abundant supply of energy to drive the synthesis of compounds like protein forming amino acids. In later work, researchers from Imperial College in London and University of Kent conducted a series of experiments very similar to Goldman’s simulations in which a projectile was fired using a light gas gun into a typical cometary ice mixture. The result: Several different types of amino acids formed.

“Impact events could have not only delivered prebiotic precursors to the primitive planet, but the sudden increase in pressure and temperature from the impact itself was likely a driving factor in synthesizing their assembly into these primary structures,” Goldman said.

Specifically, this new $500,000 grant will fund quantum simulation studies to understand aqueous mixtures of pre-formed amino acids under impact conditions. Goldman’s current efforts will extend his previous work by looking at one step higher in complexity, where extreme pressures and temperatures from impact could induce the formation of more intricate chemical structures like peptide chains or simple proteins.

“Large astrophysical bodies such as comets likely already contain more complex prebiotic materials, like amino acids. It’s possible that pre-existing amino acids would have experienced additional impacts during periods of heavy bombardment on early Earth,” Goldman said. “Our quantum simulations hope to help answer these questions, and to give an indication as to what set of thermodynamic conditions promotes their assembly into larger structures.”

How and when prebiotic organic material appeared on early Earth has been debated for close to 60 years, starting with the seminal Miller-Urey experiments, which showed that amino acids could be produced in aqueous mixtures subjected to electrical discharges, simulating lightning on early Earth.

Large bodies from space are carriers of prebiotic materials. Previous analysis of dust samples from comet Wild 2 has shown the presence of the amino acid glycine in the captured material. In addition, dipeptides (i.e., an amino acid dimer) likely exist in interstellar ices. Assuming survival upon delivery to Earth, these could have acted as catalysts in the formation of a number of prebiotic compounds, including sugars and enzymes.

“Our predictions will help spur future collaboration with experimental groups to characterize the synthesis of primary biomaterials due to exposure to extreme pressures and temperatures,” Goldman said.

Source: Lawrence Livermore National Laboratory [July 07, 2015]

How an Aberdonian would have looked around 750 years ago is to be reconstructed by one of the world’s top forensic anthropologists.

Professor Sue Black, director of the Centre for Anatomy and Human Identification at Dundee University, is in talks with city chiefs on the project after a mass haul of medieval skeletons was made in the city centre earlier this year.

Professor Black described it as a “fascinating project” and is due to create a 3D map to give an impression of how the city forebearers may have looked.

If the condition of the remains found underneath Aberdeen Art Gallery is good enough, a whole family could be reconstructed.

A bronze cast of the impressions could become the centrepiece to Aberdeen’s new art gallery complex, due to open in 2017.

Aberdeen City Council Leader, Councillor Jenny Laing, said the prospect of working with Professor Black elevated the gallery project to a new level.

She said: “Sue Black is the world’s leading forensic anthropologist and to have her engaged in this project elevates our work to a new level and opens the door to new possibilities.”

“These people pre-date Robert the Bruce and were alive when Henry III was on the English throne – it is fascinating to think that we could get a glimpse into their world and to consider how Aberdeen has changed through the centuries. The analysis that is being done will provide a unique insight into the people that have lived right here in Aberdeen centuries ago.

“It is all the more special to think that they are our forefathers.”

In March, 92 skeletons believed to date back to the 13th Century were unearthed from under Aberdeen Art Gallery during the £30 million redevelopment works.

It is likely that the discovery of the skeletons was linked to Blackfriars, a church and friary dating to around 1230 that was destroyed during the Reformation. Archaeologists found a collection of bones of at least 40 people in three coffins and a further 52 skeletons were found in individual coffins in their own graves.

Artefacts and treasures such as coins, coffin fixtures and textile ceramics were also found and are currently being analysed in London along with the skeletons.

Details on disease, war or famine in that time period are now being searched for.

Author: Alison Campsie | Source: The Scotsman [May 25, 2016]

A long-running smuggling scandal involving temple looters in India and a high-profile New York art dealer has widened after an independent review found that the National Gallery of Australia may have been among the prestigious art galleries duped by false documentation.

The Canberra-based gallery, which is Australia's leading cultural institution, said in mid-February that it had identified 22 objects with suspect origins in its Asian art collection, including 14 works bought from former New York-based dealer Subhash Kapoor for $11 million.

Kapoor is in custody in Chennai, India, awaiting trial on art theft charges following his arrest in Germany in October 2011 and extradition to India in mid-2012.

The Canberra gallery said an independent review of its Asian art provenance project by a former High Court judge, Susan Crennan, found the 22 objects had "insufficient or questionable" documentation of their provenance.

One of the objects, a 900-year-old Chola-era bronze statue entitled "Shiva as Lord of the Dance (Nataraja)" has already been returned to India. Former Australian Prime Minister Tony Abbott handed it over to Indian Prime Minister Narendra Modi in September 2014, along with a stone statue of Ardhanariswara (Shiva in half-female form), dating from around 1100. That statue was in the collection of another leading Australian gallery, the Sydney-based Art Gallery of New South Wales.

Both of these Hindu art treasures allegedly were stolen from temples in Tamil Nadu in southern India and shipped to Kapoor.

The Canberral gallery bought the Shiva Nataraja from Kapoor's Art of the Past gallery on Madison Avenue in New York in 2008 for $5.1 million, while the New South Wales gallery paid Kapoor 300,000 Australian dollars ($220,800) in 2004 for the Ardhanariswara. The provenance documents he provided now appear to be fraudulent, according to Crennan's report. "There is evidence that the object (the Shiva Nataraja) was stolen from an identified temple in Tamil Nadu ... and that it left India in late 2006 and was given a false ownership history," she wrote. Kapoor is alleged to have masterminded the theft of 28 bronzes from two temples in Tamil Nadu in 2006 and 2008, and their illegal export to the U.S., according to the Economic Offences Wing of the Tamil Nadu police. U.S. authorities have seized $100 million worth of antiquities from Kapoor's gallery and an associated business, Nimbus Import Export, and Kapoor may face U.S. charges after his Chennai trial. Delhi-born Kapoor, 66, moved to the U.S. in 1974 and is a U.S. citizen.

The two Australian galleries are not the only major institutions to have made purchases from Kapoor; galleries in Singapore, Germany, the U.S. and Canada have returned art objects to India over the past year.

A private New York collector surrendered a $1 million bronze to U.S. authorities in mid-2015 after it was identified as stolen. It has also become clear that many major U.S. institutions dealt with Kapoor, including the Metropolitan Museum of Art in New York, the Museum of Fine Arts in Boston, the Art Institute of Chicago, the Toledo Museum of Art in Ohio and the Smithsonian's Freer and Sackler Galleries in Washington DC.

Crennan's independent report on the Canberra gallery's Asian Art Provenance project, published on Feb. 17, covers 36 objects acquired between 1968 and 2013, including the 14 bought from Kapoor between 2002 and 2011.

Crennan found that only 12 of the 36 had satisfactory provenance, while two others needed further research and the remaining 22 had insufficient or questionable provenance documentation. The gallery aims eventually to publish the provenance of all 5,000 objects in its Asian art collection.

Aside from the Kapoor purchases, the 36 objects whose documentation was reviewed by Crennan included a red sandstone sculpture, the "Seated Buddha," which the gallery bought from Nancy Wiener Galleries in New York for $1,080,000 in 2007. Last year, after discussions about how the Kushan-period sculpture -- created between 200 BC and 400 AD -- was exported from India, Wiener agreed to refund the purchase price to the Canberra gallery and undertook to return the sculpture to India in 2016.

"Exemplary collaboration"

India's High Commissioner in Australia, Navdeep Suri, praised the Canberra gallery's actions, saying its collaboration with the Archaeological Survey of India to determine the provenance of the "Seated Buddha" was "truly exemplary." He said the Australian gallery had set an example for other countries and institutions to follow in the restitution of stolen artworks to their countries of origin.

The Canberra gallery bought the "Seated Buddha" with assistance from gallery benefactor Roslyn Packer, widow of the late media tycoon Kerry Packer. Roslyn Packer also helped the gallery to buy an 800-year-old sculpture, the "Sacred Bull Nandi, Vehicle of Shiva," for A$655,000 from another New York art dealer, Carlton Rochell, in 2009. This sculpture's provenance is also under a cloud; Crennan's report described it as "problematic" and needing further research.

In a September 2014 statement to mark Abbott's return of the two statues to India, the Canberra gallery said it "would never knowingly purchase a stolen or looted item." It said the gallery had undertaken lengthy, comprehensive and independent research before it bought the Shiva Nataraja from Kapoor in 2008. "Despite these efforts, court proceedings may yet confirm that the gallery has been a victim of a most audacious fraud," said the then director of the gallery, Ron Radford. Radford retired the same month, after 10 years as director.

The search for the Hindu statues stolen from two temples in Tamil Nadu in 2006 and 2008 was aided by photographic evidence from the archives of the French Institute of Pondicherry. The institute, established in what was once the French colony of Pondicherry, about 200km south of Chennai, had a collection of photographs of items in various temples in the region. These were matched against catalogue pictures of items being offered for sale by Kapoor in New York. Kapoor's Art of the Past gallery manager Aaron Freedman pleaded guilty in the U.S. in December 2013 to one count of criminal conspiracy and five counts of possession of stolen property. He is now helping U.S. federal authorities with their inquiries. Another New York associate, Selina Mohamed, was charged in December 2013 with possession of stolen property. She subsequently pleaded guilty to a misdemeanor charge of conspiracy and in March 2015 was given a one year conditional release.

The arrests were part of Operation Hidden Idol, run by the U.S. Immigration and Customs Homeland Security Investigations' cultural property unit, which focused on Kapoor's activities.

The Kapoor case evokes parallels with an art looting saga from the 1970s involving a temple north-east of Cambodia's famed Angkor complex. Between 2013 and 2015, six 10th century sandstone statues that were stolen from the Koh Ker temple during the Cambodian civil war were returned to Cambodia from the U.S. The Metropolitan Museum of Art in New York returned two of these statues in 2013 after it said new information had come to light that was not available when the statues were donated to the museum between 1987 and 1992.

In 2014, three items portraying characters from the Mahabharata, an epic Sanskrit poem of ancient India, were returned by the U.S., including a statue of Duryodhana that was first auctioned in London in 1975. The statue was due to be auctioned by Sotheby's in New York in March 2011 before action by Unesco, the United Nations cultural organization, stopped the sale on Cambodia's behalf.

Another statue, of the character Bhima, was returned by California's Norton Simon museum and a third, representing the character Pandava, was returned by Christie's auction house in 2014. Last year, the Cleveland Museum of Art said it would return a statue of Hanuman, a Hindu god, that it acquired in 1982.

Author: Geoff Hiscock | Source: Nikkei Asian Review [March 04, 2016]

A new and more dangerous phase of impacts on the world's remaining tropical forests is emerging, threatening to simplify the world's most diverse ecosystem including mass species loss, according to new UCL-led research published today in Science.

The impact of humans on these areas has been increasing for millennia and today more than three-quarters of the world's remaining tropical forests have been degraded by human actions.

The scientists identified three prior phases of expanding impacts, the first when hunter-gatherers moved into tropical forests and the second following the emergence of tropical agriculture, some 6,000 years ago. Under both, the overall health of tropical forests was maintained.

Today, we live in the third phase, marked by much greater impacts, with distant decision-makers directing how land is used, including permanent intensive agriculture, often for soybeans or palm oil, frontier industrial logging for timber export, cross-continental species invasions, and early climate change impacts. The scientists term this phase the era of 'Global Integration', affecting even the most remote areas.

Lead author, tropical forest expert Dr Simon Lewis (UCL Geography and University of Leeds) said: "Earth has lost 100 million hectares of tropical forest over the last 30 years, mostly to agricultural developments. Few people think about how intertwined with tropical forests we all are. Many foodstuffs include palm oil which comes from once pristine Asian tropical forest, while remaining intact forests are buffering the rate of climate change by absorbing about a billion tonnes of carbon each year."

Current trends look set to intensify without major policy changes, as global food demand is projected to double, over 25 million kilometres of road are predicted to be built by 2050, and climate change intensifies, ushering in a new phase of human dominance of tropical forests.

Dr Lewis added: "I fear a global simplification of the world's most complex forests. Deforestation, logging and road building all create fragmented patches of forest. However, as the climate rapidly changes the plants and animals living in the rainforest will need to move to continue to live within their ecological tolerances. How will they move? This is a recipe for the mass extinction of tropical forest species this century.

"What is needed are unbroken areas of forest that link today's core tropical regions with forest areas about 4 degrees cooler, so as temperatures rise and rainfall patterns change species have a better chance of surviving rapid 21st century climate change. We need to bring conservation in line with the reality of climate change."

The authors note that while deforestation and degradation continue, more optimistically, logged forest retains many environmental benefits, and marginal agricultural lands are being abandoned, which can return back to forest.

Dr David Edwards (University of Sheffield), co-author of the study, said: "Much biodiversity still remains in selectively logged forests, and can recover in secondary forests that grow on abandoned farmland. There is abundant potential to incorporate these forests into global plans to make tropical biodiversity climate change ready.

"Despite their value for biodiversity, logged-over and old secondary forests are frequently threatened by conversion to species-poor agricultural plantations. We urgently need to protect these human-impacted forests, especially in regions such as Southeast Asia where almost nowhere is left undegraded."

A suite of policy measures can help tropical forests survive, including giving forest dwellers formal collective legal rights over their land, which previous studies have shown is one of the best ways of preserving forests. A study of 292 protected areas in Amazonia showed that indigenous reserves were the most effective at avoiding deforestation in high pressure areas.

Most of the financial benefits of logging and plantation agriculture, such as palm oil, flow out of the forests. Ensuring local people have collective long-term rights over their lands would mean that benefits flowing from forest lands accrue to local people. This can provide the beginnings of programs of 'development without destruction', tackling poverty while maintaining forests. This, the authors argue, provides human rights and conservation win-wins.

Dr Lewis added: "With long-term certainty of tenure people can plan, maintaining forests while investing in improving agricultural productivity without expanding into forested lands. Forest dwellers won't be perfect managers of forests, but they won't look for a quick profit and then move on, as big businesses often do.

"This is a pivotal year for the global environment. There are some good signs for the world's tropical forests, with the UN New York Declaration on Forests agreeing to not only halt deforestation, but also restore 150 million hectares of forest. However, there are ominous signs too, with the palm oil industry having driven the world's highest deforestation rates in South East Asia now gearing up to repeat this process across Africa.

"The Paris climate change talks in December are doubly important for forests and forest communities. The levels of emission cuts will be a critical factor in determining how many tropical forest plants and animals go extinct over the coming decades and centuries. The agreements on reducing deforestation, including durable finance, will be pivotal. The final test will be whether some funds for adaptation will include land-use planning to retain forest connectivity as the climate rapidly changes."

Source: University College London [August 24, 2015]

Archaeologists have created a new database from the teeth of prehistoric humans found at ancient burial sites in Britain and Ireland that tell us a lot about their climate, their diet and even how far they may have travelled. In a paper, led by Dr Maura Pellegrini from the University of Oxford, researchers say that individuals in prehistoric Britain were highly mobile.

The study is part of the international Beaker People project lead by Professor Mike Parker Pearson of University College London, and involves scientists from many institutions, including the universities of Oxford, Durham, Bradford, University College London, and the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany. The paper says most of the teeth in the collection date back to Chalcolithic and Early Bronze Age periods (from 2500 to 1500 BC) and the analysis, published in the journal >Scientific Reports, suggests not only were people moving around their own country but may also have travelled to and from continental Europe.

Researchers describe how tests on tooth fragments using an oxygen isotope analysis of tooth enamel provides evidence of where an individual lived when the tooth formed. Oxygen, a naturally occurring element in the environment, is absorbed by plants and animals and fixed in the mineral component of mammalian teeth, with an isotopic composition related to the environment in which that individual spent their childhood.  Based on the theory that prehistoric people would have sourced water and food locally, the team were able to geographically map the oxygen isotopic variability in the landscape of Britain and Ireland thereby providing a guide to where individuals sampled had lived as children.

An analysis of the teeth of those buried in the Stonehenge region, the Peak District, and the hills of the Yorkshire Wolds (in East Riding and North Yorkshire) show many were not 'local' to their final resting place. They were drawn from far and wide, sometimes to focal points containing sacred monuments. The variability in the isotope values was found to be particularly marked in individuals recovered from Woodhenge, a timber circle situated near Stonehenge; Bee Low, a Bronze Age round cairn in the Peak District, and Garton Slack in Yorkshire where there is a complex range of barrow types and burial practices.

Tooth enamel fragments from 261 individual teeth were tested with researchers focusing on the central part of the tooth crown in each case. The teeth sampled from these individuals mineralise from the age of two years up to 8 years old, providing the clues to the environmental conditions, including the water they drank as a child. The possibility that people were outsiders who came into areas where they eventually died was calculated by comparing their values with the 'isoscape' information gleaned from most of the other samples in each area, as it was assumed the latter represented 'local' individuals. As individuals' signatures in the teeth were matched with areas where the majority, or 'local' people, were found, the researchers identified those who had lived in other areas as children.

Source: University of Oxford [October 08, 2016]

The world's fastest land animal, the cheetah (Acinonyx jubatus), is sprinting towards the edge of extinction and could soon be lost forever unless urgent, landscape-wide conservation action is taken, according to a study published today in the journal >Proceedings of the National Academy of Sciences.

Led by Zoological Society of London (ZSL), Panthera and Wildlife Conservation Society (WCS), the study reveals that just 7,100 cheetahs remain globally, representing the best available estimate for the species to date. Furthermore, the cheetah has been driven out of 91% of its historic range. Asiatic cheetah populations have been hit hardest, with fewer than 50 individuals remaining in one isolated pocket of Iran.

Due to the species' dramatic decline, the study's authors are calling for the cheetah to be up-listed from 'Vulnerable' to 'Endangered' on the IUCN Red List of Threatened Species. Typically, greater international conservation support, prioritization and attention are granted to wildlife classified as 'Endangered', in efforts to stave off impending extinction.

Dr. Sarah Durant, ZSL/WCS lead author and Project Leader for the Rangewide Conservation Program for Cheetah and African Wild Dog, said: "This study represents the most comprehensive analysis of cheetah status to date. Given the secretive nature of this elusive cat, it has been difficult to gather hard information on the species, leading to its plight being overlooked. Our findings show that the large space requirements for cheetah, coupled with the complex range of threats faced by the species in the wild, mean that it is likely to be much more vulnerable to extinction than was previously thought."

Durant continued, "We have worked with range state governments and the cheetah conservation community to put in place comprehensive frameworks for action to save the species, but funds and resources are needed to implement them. The recent decisions made at the CITES CoP17 meeting in Johannesburg represent a significant breakthrough particularly in terms of stemming the illegal flow of live cats trafficked out of the Horn of Africa region. However, concerted action is needed to reverse ongoing declines in the face of accelerating land use changes across the continent."

While renowned for its speed and spots, the degree of persecution cheetahs face both inside and outside of protected areas is largely unrecognized. Even within guarded parks and reserves, cheetahs rarely escape the pervasive threats of human-wildlife conflict, prey loss due to overhunting by people, habitat loss and the illegal trafficking of cheetah parts and trade as exotic pets.

To make matters worse, as one of the world's most wide-ranging carnivores, 77% of the cheetah's habitat falls outside of protected areas. Unrestricted by boundaries, the species' wide-ranging movements weaken law enforcement protection and greatly amplify its vulnerability to human pressures. Indeed, largely due to pressures on wildlife and their habitat outside of protected areas, Zimbabwe's cheetah population has plummeted from 1,200 to a maximum of 170 animals in just 16 years -- representing an astonishing loss of 85% of the country's cheetahs.

Scientists are now calling for an urgent paradigm shift in cheetah conservation, towards landscape-level efforts that transcend national borders and are coordinated by existing regional conservation strategies for the species. A holistic conservation approach, which incentivises protection of cheetahs by local communities and trans-national governments, alongside sustainable human-wildlife coexistence is paramount to the survival of the species.

Panthera's Cheetah Program Director, Dr. Kim Young-Overton, shared, "We've just hit the reset button in our understanding of how close cheetahs are to extinction. The take-away from this pinnacle study is that securing protected areas alone is not enough. We must think bigger, conserving across the mosaic of protected and unprotected landscapes that these far-ranging cats inhabit, if we are to avert the otherwise certain loss of the cheetah forever."

The methodology used for this study will also be relevant to other species, such as African wild dogs, which also require large areas of land to prosper and are therefore similarly vulnerable to increasing threats outside designated protected areas.

Source: Panthera [December 26, 2016]

When the Black Death swept through Europe in 1347, it was one of the deadliest disease outbreaks in human history, eventually killing between a third and half of Europeans.

Prior work by investigators has traced the cause to plague-carrying fleas borne by rats that jumped ship in trading ports. In addition, historical researchers believe that famine in northern Europe before the plague came ashore may have weakened the population there and set the stage for its devastation.

Now, new research using a unique combination of ice-core data and written historical records indicates that the cool, wet weather blamed for the northern European famine actually affected a much wider area over a much longer period. The work, which researchers say is preliminary, paints a picture of a deep, prolonged food shortage in the years leading to the Black Death.

“The evidence indicates that the famine was a broader phenomenon, geographically and chronologically,” said Alexander More, a postdoctoral fellow in the Harvard History Department and a lecturer in the History of Science Department.

A widespread famine that weakened the population over decades could help explain the Black Death’s particularly high mortality. Over four or five years after arriving in Europe in 1347, the pandemic surged through the continent in waves that killed millions.

The ice-core data is part of a unique program linking traditional historical research with scientific data-collecting techniques. The program, called the Initiative for the Science of the Human Past at Harvard (SoHP), is headed by Michael McCormick, the Francis Goelet Professor of Medieval History. SoHP’s ice-core project is being conducted in collaboration with the University of Maine’s Climate Change Institute and researchers at Heidelberg University. The project’s approach puts it at the juncture of environmental science, archaeology, and history. It is supported by the Arcadia Fund of London.

More presented his findings at a conference in November arranged to discuss the project. Joining him was Harvard junior Matthew Luongo, an Earth sciences and environmental engineering concentrator from Dunster House, who discussed the discovery of volcanic tephra in the ice core. Tephra, microscopic airborne volcanic particles, are generally believed absent from cores in European glaciers, make Luongo’s assumption-puncturing discovery potentially significant.

Luongo spent several days at the Climate Change Institute last summer performing chemical analyses and examining the volcanic bits through a scanning electron microscope. Each volcanic eruption has a slightly different chemical fingerprint, so he was able to trace the tephra to the 1875 Askja eruption in Iceland, one of the largest eruptions there in history.

Since many eruptions were written about contemporaneously, the ice core’s volcanic traces can be used to align ice-core data with written records, providing greater certainty in dating other chemical traces in the ice, such as those from human activities like lead from Roman-era smelting.

“I think it was a really important project,” Luongo said.

McCormick said that the advanced technologies scientists used to understand areas like the human genome and climate change are increasingly being applied to the humanities, and opening new avenues of investigation.

McCormick was part of a team that in 2011 used tree-ring data to reconstruct European climate over the last 2,500 years, showing that the period before the fall of the Roman Empire was marked by wide climactic variability. In November, McCormick summed up the use of climate data in historical research as reading history “from the environment itself.”

“All these things are happening in the sciences and spilling over into the humanities,” McCormick said. “Twenty years ago, if you’d have told me that climate could have caused the collapse of the Roman Empire and that we would have the means to test that, I wouldn’t have believed you.”

The new data emerging from the ice core could be the first of a flood of information about the last millennium and beyond. McCormick’s University of Maine colleagues, led by Paul Mayewski, have developed a laser-based method of ice analysis. It requires far smaller samples of ice and can take 50,000 samples in a one-meter ice core, compared with just 100 in the previous method. The new technology allows much higher resolution analysis of even very thin ice layers — to the specific year and potentially to individual storms — and can go back farther than the 1500 A.D. limit of this glacier with previous techniques.

The ice core was the first ever taken specifically for historical research, McCormick said, and was drilled in 2013 from the Colle Gnifetti glacier, high in the Alps near the Swiss-Italian border. It was divided between partner organizations, with the portion allocated to the Initiative for the Science of the Human Past and the Climate Change Institute being held at the University of Maine.

The findings about the period preceding the Black Death described by More continue to fill in an emerging and newly complex picture of a key period in human history. Recent research has traced the genesis of the European plague to animal groups in Asia and climate-related outbreaks that traveled along Silk Road trade routes.

McCormick said this application of scientific methods opens new avenues of inquiry, akin to discovering colossal collections of historical records, whether read directly from the DNA of ancient people, from the trees that grew at the time, or from the ice deposited in ancient storms.

“It’s a gigantic set of archives that document the least-documented part of [history],” McCormick said. “It’s kind of a renaissance of history.”

Author: Alvin Powell | Source: Harvard University [January 07, 2016]

The reunification of ancient Egypt achieved by Nebhepetre Mentuhotep II—the first pharaoh of the Middle Kingdom—was followed by a great cultural flowering that lasted nearly 400 years. During the Middle Kingdom (mid-Dynasty 11–Dynasty 13, around 2030–1650 B.C.), artistic, cultural, religious, and political traditions first conceived and instituted during the Old Kingdom were revived and reimagined.

This transformational era will be represented through 230 powerful and compelling masterworks (individual objects and groups of objects) in the major international exhibition Ancient Egypt Transformed: The Middle Kingdom, opening October 12 at New York’s Metropolitan Museum of Art. Fashioned with great subtlety and sensitivity, and ranging in size from monumental stone sculptures to delicate examples of jewelry, the works of art are drawn from the preeminent collection of the Metropolitan—which is particularly rich in Middle Kingdom material—and 37 museums and collections in North America and Europe. This is the first comprehensive presentation of Middle Kingdom art and culture and features many objects that have never been shown in the United States.

“The astonishing continuity of ancient Egyptian culture, with certain basic principles lasting for thousands of years, gives the impression of changelessness,” said Adela Oppenheim, Curator of Egyptian Art. “But the works of art in the exhibition will show that ancient Egypt constantly evolved, and was remarkably flexible within a consistent framework. New ideas did not simply replace earlier notions; they were added to what had come before, creating a fascinating society of ever-increasing complexity.”

Arranged thematically and chronologically, the exhibition opens with a forceful, monumental statue of King Mentuhotep II, carved in an intentionally archaic style that suggests a link to the legendary kings of early Egypt (ca. 3300 B.C.).

Profound changes in the concept of kingship are demonstrated through a series of royal statues that span several hundred years. Early Middle Kingdom pharaohs are often depicted with youthful faces and confident expressions. In contrast, the evocative, fleshy faces and deep-set, hooded eyes of later kings present startling images of maturity and humanity.

During the 12th Dynasty, the construction of pyramid complexes resumes, after a lapse of more than a century. The innovation found in these complexes is exemplified by that of Senwosret III (around 1878-1840 B.C.) at Dahshur, site of Metropolitan Museum excavations since 1990. A detailed 1-to-150 scale model made by Ron Street, Supervisor of the Museum’s Three-Dimensional Imaging, Prototyping, and Molding Studio, will show the original form of the complex.

Royal women were always closely connected to the pharaoh, as evidenced by the placement of their burials and chapels near those of the king. Although less is known about Middle Kingdom queens and princesses, indicating altered or perhaps diminished roles during the era, some of the finest ancient Egyptian jewelry was produced for elite women of the time. Inscriptions and symbolic motifs endowed the jewelry with spiritual power and related to the role these women played in supporting the kings as guarantors of divine order on earth.

During the Middle Kingdom, members of all levels of Egyptian society commissioned a wider variety of works of art and constructed commemorative chapels at significant holy sites; statues of squatting figures rendered in a cubic, block-like form and statues in an attitude of prayer originate during this period.

Thematic groupings of artifacts from domestic settings, tombs, and temples reveal the breadth of artistic expression, evolution of styles, and the transformation of many aspects of Egyptian culture and religion. First attested in the Middle Kingdom are a variety of intriguing, protective magical objects, notably some that were believed to shield pregnant women and young children. Among them are curved hippopotamus tusks that are unique to this era and are covered with images of beneficial supernatural beings.

The family was always a central element of ancient Egyptian culture, but in the Middle Kingdom larger groups of relatives are depicted together on stelae and sculptures. One remarkable stela on view features depictions of 30 individuals. Others include poignant groupings of mothers and their young children.

Significant changes in afterlife beliefs during the Middle Kingdom are manifest in new kinds of objects present in burials. Intricately and finely rendered miniatures of painted wood (so-called models) from the tomb of the chancellor Meketre (ca. 1980–75 B.C.), excavated by the Metropolitan in 1920, depict food production, manufacturing, and journeys by boat; they are displayed in several sections of the exhibition.

During the Middle Kingdom, the god Osiris gained importance as a funerary deity and, from then on, the dead at all levels of society became manifestations of the god. Because Osiris functioned as the ruler of the underworld, certain symbols and regalia that had been the sole prerogative of the reigning king were appropriated for non-royal use: mummies sometimes had a uraeus on the brow (a stylized cobra usually seen on a pharaoh’s crown), and a flail (a standard attribute of the pharaoh) could be placed inside a coffin. Canopic jars, which held the organs of the deceased, became much more ornate in the Middle Kingdom. With lids in the form of human heads, the vessels are small sculptures in their own right.

As devotion to Osiris increased, his cult center at Abydos (north of Luxor) gained prominence. Annual processions were held between his temple and his supposed burial place in the desert to the west. To participate eternally in these elaborate rites and ensure their afterlife, individuals at many levels of society erected memorial chapels—some with outstanding artworks—for themselves and their families along the procession route.

Deity temples—largely built of fragile mud brick in the Old Kingdom—were transformed dramatically during the Middle Kingdom, when pharaohs commissioned decorated stone temples throughout the country. Decoration included spectacular sculpture and reliefs depicting the pharaoh presenting offerings to and revering deities, as well as statues of the gods.

Colossal statues were first made during the Old Kingdom, but they became much more common during the Middle Kingdom. Portions of colossal statues will be displayed throughout the exhibition, with the largest in scale being presented at its conclusion: a monumental head of pharaoh Amenemhat III that was transported to the Delta city of Bubastis and reused by later kings. The same happened to the colossal statue of a mid-Dynasty 12 king, on loan from the Ägyptisches Museum und Papyrussammlung, Berlin, and on view in the Museum’s Great Hall. Pharaohs after the Middle Kingdom reused the monuments of their predecessors, particularly those of the Middle Kingdom, both for economy and to link themselves to the past.

General knowledge of the history of the Middle Kingdom—the achievements of its artists, its religious beliefs, burial customs, and relationships with other lands—stems in large part from Metropolitan Museum sponsorship of numerous excavations at Middle Kingdom sites including Deir el-Bahri (1920–31), Lisht (1906–34, 1984–91), and Dahshur (1990–present).

Source: The Metropolitan Museum of Art [September 26, 2015]

Architecture of London

The architecture of London is presented almost by all architectural styles: from the baroque and art-deco to a postmodernism and hi-tech. Many medieval buildings have not saved because of the Great fire of 1666 which has destroyed more than 13,000 London buildings, and air-bombardments during the Second World War.

The Norman architecture to England was brought by William the Conqueror. From constructions of Norman style is known the London Tower which has started to be constructed by William the Conqueror and was repeatedly completed by other British Kings. Besides in the same style is executed the Westminster Hall constructed in 1097. At that point in time it was the biggest hall in Europe.

Norman Architectural Style for London

One of the brightest samples of this architectural style is the Westminster Abbey. Other samples of this period in London have not remained. The XIX-century is the time of the variety of architectural styles. In the neo-Gothic Style is constructed the well-known building of Parliament with Big Ben Tower. This building has been constructed after a fire on October, 16th, 1834 on a place of the old Westminster palace.

London City Hall by Fosters + Partners

In the XX-century in a London City there were skyscrapers: the Shard by Renzo Piano, the Lloyd’s of London, a mega-complex the Canary Wharf (Docklands). Norman Foster became the leading British architect, he constructed skyscraper SwissRe or 30 St Mary Axe and the New City Hall (the mayor house).

The ice sheet covering Greenland is four times bigger than California -- and holds enough water to raise global sea-level more than twenty feet if most of it were to melt. Today, sea levels are rising and the melting of Greenland is a major contributor. Understanding how fast this melting might proceed is a pressing question for policymakers and coastal communities.

To make predictions about the future of the ice sheet, scientists have tried to understand its past, hoping to glean what the ice was doing millions of years ago when the Earth was three or more degrees Fahrenheit warmer than it is now. But our understanding of the ice sheet's complex behavior before about 125,000 years ago has been fragmentary at best.

Now, two first-of-their-kind studies provide new insight into the deep history of the Greenland Ice Sheet, looking back millions of years farther than previous techniques allowed. However, the two studies present some strongly contrasting evidence about how Greenland's ice sheet may have responded to past climate change -- bringing new urgency to the need to understand if and how the giant ice sheet might dramatically accelerate its melt-off in the near future.

The two new studies were published in the journal Nature, including one led by University of Vermont geologist Paul Bierman.

Ice On the East

In >the first study Bierman and four colleagues -- from UVM, Boston College, Lawrence Livermore Laboratory, and Imperial College London -- examined deep cores of ocean-bottom mud containing bits of bedrock that eroded off of the east side of Greenland. Their results show that East Greenland has been actively scoured by glacial ice for much of the last 7.5 million years -- and indicate that the ice sheet on this eastern flank of the island has not completely melted for long, if at all, in the past several million years. This result is consistent with existing computer models.

Their field-based data also suggest that during major climate cool-downs in the past several million years, the ice sheet expanded into previously ice-free areas, "showing that the ice sheet in East Greenland responds to and tracks global climate change," Bierman says. "The melting we are seeing today may be out of the bounds of how the Greenland ice sheet has behaved for many millions of years."

Since the data the team collected only came from samples off the east side of Greenland, their results don't provide a definitive picture of the whole Greenland ice sheet. But their research, with support from the National Science Foundation, provides strong evidence that "an ice sheet has been in East Greenland pretty much continuously for seven million years," says Jeremy Shakun, a geologist at Boston College who co-led the new study. "It's been bouncing around and dynamic -- but it's been there nearly all the time."

Contrasting Results

The >other study in Nature -- led by Joerg Schaefer of Lamont-Doherty Earth Observatory and Columbia University, and colleagues -- looked at a small sample of bedrock from one location beneath the middle of the existing ice sheet and came to what appears to be a different conclusion: Greenland was nearly ice-free for at least 280,000 years during the middle Pleistocene -- about 1.1 million years ago. This possibility is in contrast to existing computer models.

"These results appear to be contradictory -- but they may not be," UVM's Bierman says. He notes that both studies have "some blurriness," he says, in what they are able to resolve about short-term changes and the size of the ancient ice sheet. "Their study is a bit like one needle in a haystack," he says, "and ours is like having the whole haystack, but not being sure how big it is."

That's because Schaefer and colleagues' data comes from a single point in the middle of Greenland, pointing to a range of possible scenarios of what happened in the past, including several that challenge the image of Greenland being continuously covered by an extensive ice sheet during the Pleistocene. In contrast, Bierman and colleagues' data provides a record of continuous ice sheet activity over eastern Greenland but can't distinguish whether this was because there was a remnant in East Greenland or whether the ice sheet remained over the whole island, fluctuating in size as the climate warmed and cooled over millions of years.

"It's quite possible that both of these records are right for different places," Bierman says. "Both of these studies apply a similar innovative technique and let us look much farther into the past than we have been able to before."

New Method

Both teams of scientists used, "a powerful new tool for Earth scientists," says Dylan Rood, a scientist at Imperial College London and a co-author on the Bierman-led study: isotopes within grains of quartz, produced when bedrock is bombarded by cosmic rays from space. The isotopes come into being when rock is at or near Earth's surface -- but not when it's buried under an overlying ice sheet. By looking at the ratio of two of these cosmic-ray-made elements -- aluminum-26 and beryllium-10 caught in crystals of quartz, and measured in an accelerator mass spectrometer -- the scientists were able to calculate how long the rocks in their samples had been exposed to the sky versus covered by ice.

>Paul Bierman, a geologist at the University of Vermont and his colleagues --f rom UVM, Boston College, 
>Lawrence Livermore Laboratory, and Imperial College London--wanted to develop a better understanding 
>of the ancient history of the huge ice sheet that covers Greenland, like this portion of the ice sheet shown from 
>a helicopter on a Bierman-led expedition there. The team studied deep cores of ocean-bottom mud containing 
>bits of bedrock that eroded off of the east side of Greenland. Their results show that East Greenland has been 
>actively scoured by glacial ice for much of the last 7.5 million years--and indicate that the ice sheet on the 
>eastern flank of the island has not completely melted for long, if at all, in the past several million years. Their 
>field-based data also suggest that during major climate cool-downs in the past several million years, the ice sheet 
>expanded into previously ice-free areas, "showing that the ice sheet in East Greenland responds to and tracks
> global climate change," Bierman says. "The melting we are seeing today may be out of the bounds of how 
>the Greenland ice sheet has behaved for many millions of years." [Credit: Joshua Brown/UVM]
This isotope technique has been used for several decades for measuring land-based erosion, but this is its first application to ocean core samples, said Lee Corbett, a postdoctoral researcher at UVM and co-author with Bierman. "This has never been attempted with marine sediments," she says. Their results overcome a basic problem of trying to discern the deep history of ice from bedrock: every time an ice sheet retreats and then grows back, it scours away the bedrock and the isotope record of its own past. "It's hard to discern an ice sheet's cycles on land because it destroys the evidence," she says, "but it dumps that evidence in the oceans, archived in layers on the bottom."

Now Corbett, Shakun, and others are applying this isotope technique to additional cores taken from around the coast of Greenland to get a more complete and in-focus picture of the whole ice sheet's long history. And they have already applied the new isotope technique far beyond Greenland -- particularly in exploring the much larger, more mysterious ice sheets covering Antarctica.

"These two apparently conflicting -- but not necessarily conflicting -- studies in Nature really force the issue that we don't know enough about how ice sheets work over deep time," Bierman says. "We must recognize the importance of advancing polar science to understand how our world works. And, right now, because we're pumping huge plumes of greenhouse gases into the atmosphere, we really need to know how our world works."

The dynamics of Antarctica's giant ice sheet is full of questions and the disastrous potential. "But there's enough sea-level rise tied-up in Greenland alone to put a lot of cities and long stretches of coastline underwater," says Paul Bierman, "including Donald Trump's property in Florida."

Source: University of Vermont [December 07, 2016]

Reciprocal food-sharing is more prevalent in stable hunter-gatherer camps, shows new UCL research that sheds light on the evolutionary roots of human cooperation.

The research explores patterns of food-sharing among the Agta, a population of Filipino hunter-gatherers. It finds that reciprocal food-sharing is more prevalent in stable camps (with fewer changes in membership over time); while in less stable camps individuals acquire resources by taking from others -- known as 'demand sharing'.

Exploring social dynamics in the last remaining groups of present day hunter-gatherers is essential for understanding the factors that shaped the evolution of our widespread cooperation, especially with non-kin.

The study, published in the Royal Society journal >Open Science, is the first to report a real-world association between patterns of cooperation and group stability.

First author of the study, Daniel Smith (UCL Anthropology), said: "Cooperation between unrelated individuals is rare in animals, yet extensive among humans. Reciprocity -- the principle of "you scratch my back, I scratch yours" -- may explain this non-kin cooperation, yet requires stable groups and repeated interactions to evolve.

"Our research shows that hunter-gatherer cooperation is extremely flexible -- reflecting either reciprocity or demand sharing depending on the frequency of repeated interactions between camp members."

The authors looked at two types of food-sharing data. Firstly, details of actual food-sharing from six Agta camps were examined to explore whether differences in camp stability predicted patterns of food-sharing. Secondly, games were also conducted in which individuals were asked to distribute resources between themselves and other camp-mates. These games were conducted with 324 Agta over 18 separate camps.

In one of the games, participants were shown their own picture, along with other randomly selected adults from camp. They were then given a number of small wooden tokens, each representing 125g rice, equal to the number of camp-mates' photos. Not every picture including the subject's could end up with rice on it, introducing a social dilemma regarding whether to share, as it would be impossible for everyone to receive rice. Participants then decided, token by token, whether to keep the rice for themselves, or to give to a camp-mate.

The results showed that, firstly, stable camps were more likely to display reciprocity in the actual food-sharing analyses. Patterns of food-sharing in unstable camps were not reciprocal, consistent with demand sharing, whereby individuals take resources from others rather than being given them. Secondly, individuals from more stable camps were increasingly likely to give resources to others and less likely to take resources in the games.

Despite differences in cooperation, individuals from both stable and unstable camps received resources from others. This distribution of resources among camp-mates is crucial for hunter-gatherers' survival. As foraging success is variable it is likely that, on any given day, an individual may return to camp with no resources. Food-sharing is therefore essential to reduce the likelihood of individuals going without resources for extended lengths of time.

Last author, Professor Ruth Mace (UCL Anthropology), added: "Food sharing and cooperation are at the centre of hunter-gatherers lifestyle. No other Apes share food or cooperate to the extent that humans do. A complex network of sharing and cooperation exists within camps and between camps in different hunter-gatherer groups, regulated by social rules, friendship ties, food taboos, kinship and supernatural beliefs. Sharing is a crucial adaptation to hunter-gatherers' lifestyles, central to their resilience -- and central to the evolution of humankind."

Source: University College London - UCL [July 13, 2016]