An ancient basin hidden beneath the Greenland ice sheet, discovered by researchers at the University of Bristol, may help explain the location, size and velocity of Jakobshavn Isbræ, Greenland's fastest flowing outlet glacier.

The research also provides an insight into what past river drainage looked like in Greenland, and what it could look like in the future as the ice sheet retreats.

Michael Cooper and colleagues from Bristol's School of Geographical Sciences and Cabot Institute, and Imperial College London, studied the bedrock in Greenland using data collected mainly by NASA (through Operation Ice Bridge), as well as various researchers from the UK and Germany, over several decades. This data is collected by aircraft using ice penetrating radar, which bounces back off the bedrock underneath the ice (as ice is mostly transparent to radio waves at certain frequencies).

Mr Cooper said: "The drainage basin we discovered shows signs of being carved by ancient rivers, prior to the extensive glaciation of Greenland (i.e. before the Greenland Ice Sheet existed), rather than being carved by the movement of ice itself. It has been remarkably well preserved – and has not been eroded away by successive glaciations. The channel network has never been seen before by humans – it was last uncovered around 3.8 million years ago."

The size of the drainage basin the team discovered is very large, at around 450,000 km2, and accounts for about 20 per cent of the total land area of Greenland (including islands).

This is comparable to the size of the Ohio River drainage basin, which is the largest tributary of the Mississippi. The channels the team mapped could more appropriately be called 'canyons', with relative depths of around 1,400 metres in places, and nearly 12km wide, all hidden underneath the ice.

As well as being an interesting discovery of great size, the channel network and basin was instrumental in influencing the flow of ice from the deep interior to the margin, both now and over several glacial cycles, as well as influencing the location and speed of the Jakobshavn ice stream.

The study is published in >Geophysical Research Letters.

Source: University of Bristol [June 14, 2016]

Long before the advent of social media, human social networks were built around sharing a much more essential commodity: food. Now, researchers reporting on the food sharing networks of two contemporary groups of hunter-gatherers in the >Cell Press journal Current Biology provide new insight into fundamental nature of human social organization.

The new work reveals surprising similarities between the Agta of the Philippines and Mbendjele of the Republic of Congo. In both places, individuals maintain a three-tiered social network that appears to buffer them against day-to-day shortfalls in foraging returns.

"Previous research has suggested that social networks across human cultures are structured in similar ways," says Mark Dyble of University College London. "Across societies, there appear to be similar limits on the number of social relationships individuals are able to maintain, and many societies are said to have a 'multilevel' structure. Our work on contemporary hunter-gatherer groups sheds light on how this distinctive social structure may have benefited humans in our hunting-and-gathering past."

While previous studies have identified similarities in social structure across hunter-gatherer populations, the researchers say that the new work is the first to explore how hunter-gatherers' distinctive, "multilevel" social organization structures social life and cooperation in important activities such as foraging and food sharing.

"No other apes share food to the extent that humans do," says Andrea Migliano, principal investigator of the Leverhulme Trust-funded Hunter-Gatherers Resilience Project. "Hunter-gatherers' multi-level social structure exists in different groups, to help regulate these cooperative systems. Furthermore, multi-level social structures regulate social rules, friendship and kinship ties, and the spread of social norms, promoting a more efficient sharing and cooperation. Sharing is a crucial adaptation to hunter-gatherers' lifestyles, central to their resilience -- and central to the evolution of mankind."

The Agta live in northeast Luzon, Philippines. Their primary source of protein is fish, supplemented by inter-tidal foraging, hunting, honey collecting, and gathering of wild foods. The Mbendjele live in an area spanning northern Republic of Congo and southern Central African Republic, where they hunt for meat in the forest. Both groups also trade wild-caught meat or fish for cultivated foods, including rice and manioc.

Dyble, Migliano, and their colleagues collected data on food sharing by living with the two communities for many months, making observations on how often households shared food with each other. From this they constructed social networks of food sharing.

"Although we had an idea of how camps split into food sharing clusters 'on the ground,' we were able to test these using algorithms which are able to identify sub-communities within the nine camps we studied," Dyble explains.

Their analysis showed that food sharing is closely related to social organization. In both communities, individuals maintain a three-tiered social network. First is their immediate household, most often consisting of five or six individuals, second is a cluster of three to four closely related households who share food frequently, and third is the wider camp.

"Despite being from different continents and living in very different ecologies, both groups of hunter-gatherers had a strikingly similar social organization," Dyble says.

"Cooperation and especially food sharing are essential for survival in a hunting-and-gathering economy," Dyble says. "The proverb that 'it takes a village to raise a child' is certainly true for hunter-gatherers, who, without food sharing to mitigate the day-to-day shortfalls in foraging, could simply not survive."

Dyble says that they now intend to explore the structure of other types of social networks in the hunter-gatherer communities, such as cooperation in childcare, and their overlap with food sharing.

Source: Cell Press [July 21, 2016]

The Museo Civico Archeologico is hosting Egypt. Millennia of Splendour. Beneath the two towers, the splendour of a civilisation that lasted thousands of years and has always fascinated the entire world, has sprung back to life: the Egypt of the pyramids, pharaohs and multiform gods, but also that of sensational discoveries, captivating archaeology, passionate collecting and rigorous scholarship.

The exhibition ‘Egypt’, which is being held at the Museo Civico Archeologico in Bologna, is not just an exposition of high visual and scientific impact, but also an unprecedented international enterprise: the Egyptian collection of the National Museum of Antiquities in Leiden, Netherlands – among the top ten in the world – and that of the Bologna museum – among the most important in Italy for the quantity, quality and state of conservation of its collections – have been brought together in an exhibition space measuring around 1,700 metres, filled with art and history.

500 finds, dating from the Pre-Dynastic Period to the Roman Period, gave been brought from the Netherlands to the Bologna museum. And, together with the masterpieces from Leiden and Bologna, the exhibition also includes important loans from the Museo Egizio in Turin and the Museo Egizio in Florence, creating a network of the most important Italian museums.

For the first time, the masterpieces of the two collections are being displayed side by side, including the Stele of Aku (Twelfth–Thirteenth Dynasty, 1976–1648 BC), the ‘major domo of the divine offering’, with a prayer describing the otherworldly existence of the deceased in a tripartite world divided into sky, earth and the beyond; gold items attributed to General Djehuty, who led the Egyptian troops to victory in the Near East for the great conqueror Pharaoh Thutmose III (1479–1425 BC); the statues of Maya, superintendent of the royal treasury of Tutankhamen, and Merit, a chantress of the god Amun, (Eighteenth Dynasty, reigns of Tutankhamen and Horemheb, 1333–1292 BC), the most important masterpieces in the National Museum of Antiquities in Leiden have left the Netherlands for the first time for the Bologna exhibition; and, among the numerous objects attesting to the refined lifestyle of the most wealthy Egyptians, a Mirror Handle (1292 BC) in the shape of a young woman holding a small bird in her hand.

Lastly, for the first time 200 years after the discovery of his tomb in Saqqara, the exhibition offers the unique and once-in-a-lifetime opportunity to see the important Reliefs of Horemheb reunited: Horemheb was the head commander of the Egyptian army during the reign of Tutankhamen, then rising to become the final sovereign of the Eighteenth Dynasty, from 1319 to 1292 BC and the reliefs are divided between the collections in Leiden, Bologna and Florence.

Thousands of years of the history of a unique civilisation revealed in a major exhibition that brings together masterpieces from important world collections and tells of the pyramids and pharaohs, the great captains and priests, the gods and other divinities, and the people that made Egyptian history and that, thanks to discoveries, archaeology and collecting, never stop enchanting, revealing, intriguing, fascinating and charming generation after generation.

The Seven Exhibition Sections

The Pre-Dynastic and Archaic Periods – At the Origins of History: The transition from raw material to form, from the oral tradition to the written one and from prehistory to history was a fundamental moment for Egyptian civilisation. The Leiden collection is rich in materials documenting the central role played by nature during this long cultural and artistic evolution.

The exhibition opens with a selection of these objects, which are strikingly modern in style, including a vase from the Naqada IID Period (named for a site in Upper Egypt and datable between 3375 and 3325 BC) decorated with ostriches, hills and water motifs. The scene depicted on this vase takes us back to an Egypt characterised by a flourishing landscape later changed over time by climatic changes. Ostriches, here painted red, along with elephants, crocodiles, rhinoceros and other wild animals were common in the Nile region at the time.

The Old Kingdom – A Political/Religious Model Destined for Success and its Weaknesses: The historic period of the Old Kingdom (from the Third to the Sixth Dynasty, roughly between 2700 and 2192 BC) is known for the pyramids and for the consolidation of a bureaucracy at the apex of which stood an absolute sovereign, considered a god on earth and lord of all of Egypt.

This definition of State and its worldly and otherworldly rules, which were highly elitist, are well documented by funerary objects, of which the Leiden museum has a particularly rich collection, including a calcite (alabaster) table for offerings.

Offerings to the deceased were a fundamental part of the funerary ritual, ensuring life after death. The uniqueness of this table, which belonged to a high state official named Defdj, lies in its circular shape, which was unusual, as well as the repetition of the concept of the offering as indicated by the inscription, the sculpted receptacles and, most importantly, the central depiction corresponding to the hieroglyph hotep (offering), or a table upon which one places a loaf of bread.

The Middle Kingdom – The God Osiris and a New Perspective on Life in the Afterworld: The end of the Old Kingdom and the period of political breakdown that followed it led to major changes in Egyptian society, within which the individual had greater responsibility for his own destiny, including in the afterworld. Any Egyptian with the means to build a tomb complete with a sufficient funerary assemblage could now aspire to eternal life. The god Osiris, lord of the afterworld, became Egypt’s most popular divinity.

Many steles now in Leiden and Bologna came from his temple in Abydos, one of Egypt’s most important cult centres. Among them is that of Aku, major domo of the divine offering, who dedicated the stele to Min-Hor-nekht, the form of the ithyphallic god Min worshipped in the city of Abydos. Aku’s prayer to the god describes an otherworldly existence in a tripartite world: the sky, where the deceased were transfigured into stars, the earth, where the tomb was the fundamental point of passage from life to death, and the beyond, where Osiris granted the deceased eternal life.

From the Middle to the New Kingdom – Territorial Control at Home and Abroad: The defeat of the Hyksos, ‘princes from foreign lands’ who invaded and governed northern Egypt for a few generations, marked the beginning of the New Kingdom. An extremely aggressive foreign policy enriched Egypt, and this was one of its periods of greatest splendour. The social class of professional warriors rose to the top of the state hierarchy and spawned a number of ruling dynasties.

The wealth and prestige of these soldiers was also expressed in the production of sophisticated objects, including the gold items attributed to Djehuty, a general under the pharaoh Thutmose III. The Egyptian goldsmith’s art has survived in works of high artistic and economic value, an example being the pectoral element on view in the exhibition.

This piece is a sophisticated exemplar attributed to the tomb of General Djehuty, the man to whom the sovereign Thutmose III entrusted control of his foreign territories. Representing a blue lotus flower, a symbol of rebirth and regeneration, it must have served as the central element of an elaborate pectoral. The scroll engraved on the back suggests that the piece was given personally by Thutmose III.

The Saqqara Necropolis of the New Kingdom: The Leiden and Bologna museums can be considered ‘twins’ in a certain sense, since they house two important groups of antiquities from Saqqara, one of the necropolises of the city of Memphis. During the New Kingdom, this early Egyptian capital returned to its role as a strategic centre for the expansionist policy of the sovereigns of the Eighteenth Dynasty.

This is seen in the funerary monuments of high state officials who held administrative, religious and military roles, including the tombs of the superintendent of Tutankhamen’s royal treasury, Maya, and his wife, Merit, chantress of Amun, and that of Horemheb, head commander of Tutankhamen’s army and the pharaoh’s crown prince.

The statues of Maya and Merit arrived in the Netherlands in 1829 as part of the collection of Giovanni d’Anastasi. More than a century and a half would pass before, in 1986, a British/Dutch archaeological expedition identified the tomb from which they came, southeast of the pyramid of Djoser at Saqqara. These statues, which are the greatest masterpieces in the collection of the National Museum of Antiquities in Leiden, left the Dutch museum for the first time to be displayed in the exhibition.

It should be noted that, when the Egypt Exploration Society of London and the National Museum of Antiquities in Leiden began excavation work southeast of the Djoser pyramid in 1975, the goal was to find the tomb of Maya and Merit. It was therefore a great surprise when they instead discovered the burial of General Horemheb, who had capped off his stunning career by becoming the last sovereign of the Eighteenth Dynasty.

His tomb, which has a temple structure, is characterised by a pylon entrance, three large courts and three cult chapels facing onto the innermost court, which has a peristyle structure. This court is where most of the reliefs preserved in Leiden and Bologna were found, narrating Horemheb’s most important military feats against the populations bordering Egypt: the Asians, Libyans and Nubians.

The New Kingdom – Prosperity after the Conquest: Refined furnishings, musical instruments, table games and jewellery: these are just a few of the luxury goods attesting to the widespread prosperity enjoyed in Egypt as a result of the expansionist policy of the sovereigns of the New Kingdom. Through these sophisticated objects, it is possible to conjure up moments of everyday life, imagining what it was like living inside a royal palace or the residence of a high official. One example in the exhibition is a mirror handle in the graceful, sensual shape of a young women holding a small bird in her hand.

Egypt in the First Millennium: In the first millennium BC, Egypt was characterised by the increasingly clear weakness of its central power to the advantage of local governors who gave themselves the role of ruling dynasts. The loss of political and territorial power weakened Egypt’s defence capacity at its borders, opening the way for Nubian, Assyrian and Persian invasions. The temples remained strong centres of power, and managed a sizeable portion of the economy and the transmission of knowledge, taking on the role of a political intermediary between the ruling power and the devout populace.

Many of the masterpieces on view in the exhibition were part of the funerary assemblages of priests and came from important temple areas. Among them is the sarcophagus of Peftjauneith, which represents the likeness of the god Osiris, wrapped in a linen shroud and with a green face evoking the concept of rebirth. The refined decoration of this sarcophagus confirms the high rank of its owner (the superintendent of the possessions of a temple in Lower Egypt) in the temple sphere. Of particular note is the interior scene of the sky goddess Nut swallowing the sun every evening (to the west) to then give birth to it in the morning (to the east).

Alexander the Great’s conquest of Egypt in 332 BC ended the ‘pharaonic’ phase of Egyptian history. The period of Greek domination was begun by his successors, the Ptolemies, the last of whom was the renowned Cleopatra VII.

The golden decline of Egypt would continue for many more centuries, beyond the Roman conquest in 31 BC up to Arab domination in the sixth century AD.

The dialogue between old and new, local and foreign that distinguished the Greco-Roman period brought a return to high artistic achievements, including the celebrated Fayum portraits, exquisite examples of which from the Leiden collection are on view in the exhibition

Source: Museo Civico Archeologico in Bologna [October 19, 2015]

At the Heart of United Kingdom

We needed an identity that could reflect what's special about our product, capture ITV's humanness and warmth and make the brand feel alive. We needed a logo that could wrap itself around a broad range of content rather than feel like a corporate badge.

Our creative platform was born from the fact that at ITV, we don't just make TV programmes, we capture life in all its glory and put it centre stage for everyone to enjoy. The new identity needed to bridge all these areas.

ITV is home to the biggest and best loved shows and talent in British popular culture; we reflect and enhance British life and at times define it. We've never told anyone who we are or why we matter. As a result, their affection was with our shows, not the brand. We were a faceless corporation without a heart.

Our brief was to create an identity that could build an emotional connection with the nation and turn them from pure viewers into fans of ITV, not just our programming.

We required a unique and approachable identity to reflect ITV's position as a human and friendly broadcaster 'at the heart of popular culture'. We based the marque on handwriting, its curves signalling an intimacy with audiences without jeopardizing the organisation's status as large and corporate.

The logotype was divided into five segments: each of which 'picks' a different colour from its background. The ability to pick colours from the background allowed the logo to compliment its surroundings. This creates a unique innovation where no two logos are ever alike.

By Week 5 of the rebrand, 52% like or love the new logo. Prompted Awareness of the new logo is now on par with the weekly reach of ITV. Reactions are really positive; it is seen as modern and eye catching. Just over half of those who were aware of a change to ITV, either loved or liked it. When compared with other broadcasters' logos, ITV's was seen as modern, colourful, bright and attractive while BBC, Channel 4 and FIVE were stronger for being boring, old fashioned and dull.

Type of entry: Graphic Design & Design Crafts;
Category: Large Scale Logo and Visual Design;
Advertiser: ITV;
Product/Service: ITV NETWORK;
Agency: ITV CREATIVE London, UNITED KINGDOM;
Executive Creative Director: Phil Lind (ITV Creative);
Head Of Design: Neill Pitt (ITV Creative);
Head Of Design: Mark Gouldie (ITV Creative);
Designer: Jason Ford (ITV Creative);
Designer: Joe Lewis (ITV Creative);
Brand Designer: Matt Rudd (Rudd Studio).

An international research team is formalizing plans to drill nearly 5,000 feet below the seabed to take core samples from the crater of the asteroid that wiped out the dinosaurs.

The group met last week in Merida, Mexico, a city within the nearly 125-mile-wide impact site, to explain the research plans and put out a call for scientists to join the expedition planned for spring 2016. The roughly $10 million in funding for the expedition has been approved and scheduled by the European Consortium for Ocean Research Drilling (ECORD) — part of the International Ocean Discovery Program (IODP) — and the International Continental Scientific Drilling Program (ICDP).

Dinosaurs and other reptiles ruled the planet for 135 million years. That all changed 65.5 million years ago when a 9-mile-wide asteroid slammed into the Earth, triggering a series of apocalyptic events that killed most large animals and plants, and wiped out the dinosaurs and large marine reptiles. The event set the stage for mammals — and eventually humans — to take over. Yet, we have few geologic samples of the now buried impact crater.

Sean Gulick, a researcher at The University of Texas at Austin Institute for Geophysics (UTIG), and a team of scientists from the U.K. and Mexico are working to change that. The team is planning to take the first offshore core samples from near the center of the impact crater, which is called Chicxulub after the seaside village on the Yucatán Peninsula near the crater’s center.

The team, led by Gulick and Joanna Morgan of Imperial College London, will be sampling the crater’s “peak ring” — an enigmatic ring of topographically elevated rocks that surrounds the crater’s center, rises above its floor and has been buried during the past 65.5 million years by sediments.

A peak ring is a feature that is present in all craters caused by large impacts on rocky planetoids. By sampling the Chicxulub peak ring and analyzing its key features, researchers hope to uncover the impact details that set in motion one of the planet’s most profound extinctions, while also shedding light on the mechanisms of large impacts on Earth and on other rocky planets.

“What are the peaks made of? And what can they tell us about the fundamental processes of impacts, which is this dominant planetary resurfacing phenomena?” said Gulick, who is also a research associate professor at the UT Jackson School of Geosciences. UTIG is a research unit of the Jackson School.

The researchers are also interested in examining traces of life that may have lived inside the peak ring’s rocks. Density readings of the rocks indicate that they probably are heavily broken and porous — features that may have served as protected microenvironments for exotic life that could have thrived in the hot, chemically enriched environment of the crater site after impact. Additionally, the earliest recovery of marine life should be recorded within the sediments that filled in the crater in the millions of years after the impact.

“The sediments that filled in the [crater] should have the record for organisms living on the sea floor and in the water that were there for the first recovery after the mass extinction event,” Gulick said. “The hope is we can watch life come back.”

The expedition will last for two months and involve penetrating nearly 5,000 feet beneath the seabed from an offshore platform. The core will be the first complete sample of the rock layers from near the crater’s center.

Once extracted, the core will be shipped to Germany and split in two. Half will be immediately analyzed by an international team of scientists from the U.S., U.K., Mexico and other nations, and half will be saved at a core repository at Texas A&M University for future research needs by the international community.

The team also includes researchers from the National Autonomous University of Mexico (UNAM) and Centro de Investigación Científica de Yucatán (CICY). Scientists interested in joining the mission must apply by May 8, 2015. For more information on the mission and the application process, see the European Consortium for Ocean Research Drilling’s call for applications.

Source: University of Texas at Austin [April 06, 2015]

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]

Science has long dictated that brains don't fossilize, so when Nicholas Strausfeld co-authored the first ever report of a fossilized brain in a 2012 edition of Nature, it was met with "a lot of flack."

"It was questioned by many paleontologists, who thought - and in fact some claimed in print - that maybe it was just an artifact or a one-off, implausible fossilization event," said Strausfeld, a Regents' professor in UA's Department of Neuroscience.

His latest paper in Current Biology addresses these doubts head-on, with definitive evidence that, indeed, brains do fossilize.

In the paper, Strausfeld and his collaborators, including Xiaoya Ma of Yunnan Key Laboratory for Palaeobiology at China's Yunnan University and Gregory Edgecombe of the Natural History Museum in London, analyze seven newly discovered fossils of the same species to find, in each, traces of what was undoubtedly a brain.

The species, Fuxianhuia protensa, is an extinct arthropod that roamed the seafloor about 520 million years ago. It would have looked something like a very simple shrimp. And each of the fossils - from the Chengjiang Shales, fossil-rich sites in Southwest China - revealed F. protensa's ancient brain looked a lot like a modern crustacean's, too.

Using scanning electron microscopy, the researchers found that the brains were preserved as flattened carbon films, which, in some fossils, were partially overlaid by tiny iron pyrite crystals. This led the research team to a convincing explanation as to how and why neural tissue fossilizes.

In another recent paper in Philosophical Transactions of the Royal Society B, Strausfeld's experiments uncovered what it likely was about ancient environmental conditions that allowed a brain to fossilize in the first place.

The only way to become fossilized is, first, to get rapidly buried. Hungry scavengers can't eat a carcass if it's buried, and as long as the water is anoxic enough - that is, lacking in oxygen - a buried creature's tissues evade consumption by bacteria as well. Strausfeld and his collaborators suspect F. protensa was buried by rapid, underwater mudslides, a scenario they experimentally recreated by burying sandworms and cockroaches in mud.

This is only step one. Step two, explained Strausfeld, is where most brains would fail: Withstanding the pressure from being rapidly buried under thick, heavy mud.

To have been able to do this, the F. protensa nervous system must have been remarkably dense. In fact, tissues of nervous systems, including brains, are densest in living arthropods. As a small, tightly packed cellular network of fats and proteins, the brain and central nervous system could pass step two, just as did the sandworm and cockroach brains in Strausfeld's lab.

"Dewatering is different from dehydration, and it happens more gradually," said Strausfeld, referring to the process by which pressure from the overlying mud squeezes water out of tissues. "During this process, the brain maintains its overall integrity leading to its gradual flattening and preservation. F. protensa's tissue density appears to have made all the difference."

Now that he and his collaborators have produced unassailable evidence that fossilized arthropod brains are more than just a one-off phenomenon, Strausfeld is working to elucidate the origin and evolution of brains over half a billion years in the past.

"People, especially scientists, make assumptions. The fun thing about science, actually, is to demolish them," said Strausfeld.

Source: University of Arizona [November 06, 2015]

The Italian mafia is selling assault rifles to Islamic State leaders in Libya in return for looted archaeological treasures, according to an Italian newspaper.

The feared ‘Ndrangheta gangsters sell on the priceless artefacts to Russian and Asian collectors.

La Stampa reports that the Calabrian network, which dominates Europe’s drug trade, works with the Camorra in Naples to buy Kalashnikov rifles and rocket-propelled grenade launchers smuggled out of Ukraine and Moldova by the Russian mafia.

The armaments are then traded in return for ancient Roman and Greek statues that Isis fighters have dug up illegally in Libya, which was a colony of the two ancient cultures. Isis has ruled over swathes of the country for months.

A journalist from La Stampa posed as a collector to be taken to a salami factory in southern Italy by a member of an ‘Ndrangheta clan from Lamezia in Calabria. For $87,000 he was offered the marble head of a Roman sculpture looted from Libya.

The Mafioso also showed photographs of a larger head from a Greek statue, for sale at $1.2 million.

Antiquities are brought from Libya to the Calabrian port of Gioia Tauro by Chinese-operated cargo ships, it is claimed. The treasures are sold on to collectors from Russia, China, Japan and the Gulf. After expanding into Libya, Isis has been pinned back by local militias. The jihadists, however, are believed to have tried to profit from trafficking in artefacts, as they have done in Iraq and Syria.

Libyan archaeologists working to protect the country’s five UNESCO-listed sites have received death threats.

Italian investigators have long suspected the mafia of selling guns to Isis. “In Naples, Islamic militias and the Camorra have been trading guns and drugs since the 1990s,” a veteran investigator said yesterday (Sunday).

The gangsters have also been involved in the wholesale looting of Etruscan Roman tombs in Italy. Trading guns for artefacts with Isis is a natural evolution of its business. The widespread excavation and selling of Greek and Roman treasures boomed in Libya after the death in 2011 of Colonel Gaddafi, well before the arrival of Isis.

A rare 4ft marble statue believed to have been dug up in the ancient city of Cyrene in 2011 and worth $3.2 million was found in a west London warehouse two years after the uprising.

Susan Kane, a Libyan expert at Oberlin College in Ohio, said: “There was a major land grab after the revolution and more earth has been moved since 2011 than in the preceding centuries. Antiquities are turning up and there is a great synergy between trafficking them, drugs and arms.”

Author: Tom Kington | Source: The Times [October 17, 2016]

Researchers from the University of Southampton have joined archaeologists from MOLA (Museum of London Archaeology) to answer the centuries old question ‘why are so many Roman skulls found in the Walbrook valley?’

Bringing together archaeological evidence and oceanographic testing, the team has shown that erosion from the Walbrook River can be credited with causing this mysterious phenomenon. The findings weree revealed in ‘Mystery of the Crossrail Skulls’ produced by True North, which aired on 24 April on Channel 4, and which explored a range of theories, including long-lost rituals.

The Walbrook skulls have been known since the 1200s and numerous findings of disarticulated Roman skulls were recorded in the 19th century, including those found in a sewer in 1839 on Blomfield Street. In 2013, engineers digging for Crossrail discovered dozens of skulls under London’s Liverpool Street station.

The theories as to their origin are various and include: decapitated victims of Boudica’s sacking of London, trophy heads collected by Roman soldiers and a continuation of the Iron Age ‘cult of the head’. The systematic excavation of a series of sites in the Walbrook valley, including most recently at Liverpool Street, has given archaeologists an opportunity to methodically study these remains in the context of the Roman landscape.

The Walbrook Valley was a watery landscape in the Roman period and the river had a network of streams that flooded seasonally. The Romans tried to manage the water and archaeological excavation revealed a number of attempts to reclaim land. Today, the Walbrook River runs entirely underground and leads into the Thames by Cannon Street.

Whilst studying the cemeteries set up by the Romans outside the city walls, MOLA archaeologists found burials close to the banks of the streams that were partially washed away by overflowing water. Working with researchers Charlie Hope and Samuel Griffiths from Ocean and Earth Science at the University of Southampton, archaeologists have been able to test how this fluvial (river) erosion carried the human remains downstream.

Using a flume filled with gravel, mirroring the conditions of the Walbrook River, Charlie and Samuel simulated what effects the impact of the gravel had on animal remains, chipping away at the bone to create a pocked marked surface.

Placing a replica skull and long bone in a long flume that replicates the flow of the Walbrook River, it was established that the shape and buoyancy of the skulls meant that they bobbed or rolled over long distances, whereas long bones, such as leg bones, sunk with little movement.

Analysing the skulls, osteologists from MOLA have identified a number of characteristics that corroborate this model, these include: shiny polished skulls where they sat in running water, pitted skulls where the gravels of the water bed chipped at the bone, and discolouration, staining and tide marks where the remains were waterlogged. Osteologists also recorded a lack of jaw bones, which indicates that the skulls came to rest when they were already disarticulated from the rest of the body.

Samuel Griffith said: “Adopting an experimental approach allowed us to reconstruct past processes, which may have led Roman skulls to accumulate in the Walbrook River. Using this experimental analysis, in conjunction with evidence recovered by archaeologists, we have been able to gain exciting new insight into history of the Walbrook skulls.”

MOLA Senior Human Osteologist, Don Walker, said: “Meticulously studying these human remains, and the landscape in which they were found, has given us the chance to finally solve the mystery of the Walbrook skulls. Sometimes we have to look outside of our immediate field of expertise and look at the problem with fresh eyes. By combining the archaeological evidence with forensic anthropology and geoarchaeology (the study of past landscapes) we have shed new light on this phenomenon.”

Source: University of Southampton [April 25, 2016]

Beneath the Aurora Borealis an oil tanker glides through the night past the Coast Guard ice breaker Amundsen and vanishes into the maze of shoals and straits of the Northwest Passage, navigating waters that for millennia were frozen over this time of year.

Warming has forced a retreat of the polar ice cap, opening up a sea route through the Canadian Arctic Archipelago and connecting the Atlantic and Pacific Oceans for several months of the year.

Commander Alain Lacerte is at the helm as the vessel navigates the Queen Maud Gulf, poring over charts that date from the 1950s and making course corrections with the help of GPS.

"Where it's white (on the chart), it means the area hasn't been surveyed," he explains -- leaning over a map that is mostly white. "Most of the far north hasn't been surveyed, so our maps are unreliable."

The crew constantly take radar and multi-beam sonar measurements and check their position.

"We don't want any shoals named after us," says the old sea dog from behind his spectacles.

Almost the size of the European Union, the Canadian Arctic seabed remains largely uncharted. The waters are also shallow and navigating unknown parts can be deadly -- even when the north is ice-free.

Today, taking this route cuts 7,000 kilometers (4,350 miles) off a trip from London to Tokyo, saving time and fuel.

'Never imagined this'

Since the 15th century there have been a dozen expeditions seeking a faster shipping route from Europe to Asia through the north.

The Norwegian explorer Roald Amundsen was the first to cross the Northwest Passage, on board the Gjoa, in an expedition that took three years, finishing in 1906.

Afterward interest in the waterway waned. An average of one ship per year attempted to make the crossing over the past century.

But thawing of the polar ice promises Arctic nations new opportunities to open ocean trade routes and offshore oil fields.

In the summer months the Amundsen is used by Canadian government scientists -- among them Roger Provost, a Canadian Ice Service meteorologist -- as well as a network of scientists led by the ArcticNet organization.

Provost looked with amazement from the wheelhouse at the lack of any ice cover around the coast guard ship.

"Anyone who still denies climate change is real has their head in the ground, they're blind," he said.

In 37 years of Arctic exploration, he said he "never imagined ever seeing this," pointing to satellite images showing a clear path through the Queen Maud Gulf and the M'Clintock Channel, where the Amundsen is headed.

Almost 112 years ago to the day, the explorer Amundsen got stuck in the pack ice here. And in 1979, Provost recalls, another Canadian Coast Guard ice-breaker had to cut short its inaugural journey, unable to push beyond this point through thick ice.

Over the past five years the number of cargo and cruise ships, tankers and others crossing the Passage climbed to 117.

In 2010, Canada imposed shipping regulations on seafarers going through the Passage, but the United States and the European Union do not recognize Canada's ownership of the waterway, considering it international waters.

'Completely disappear'

The ice cover has steadily retreated over the past decade, with this year set to be the hottest on record, according to the US National Oceanic and Atmospheric Administration.

The previous year saw average global temperatures rise one degree Celsius -- but by three degrees in the Arctic.

What most worries Provost is the loss of "multi-year ice," formed over centuries. "In a few years it will completely disappear," he forecast.

"It's a tragedy for all humanity what is happening."

Glaciologist Lauren Candlish said: "We're now in the transition phase, from having multi-year ice through the entire summer, to a seasonally ice free Arctic."

Poring over data on her computer in a nook of the ship the University of Manitoba researcher says: "It's a different Arctic now. Less predictable, with more fluctuations."

The last such melting occurred "before the last ice age," from AD 100,000 to AD 10,000, she noted.

Most aboard the ship doubt we are headed for an Arctic shipping boom predicted by many, as the weather remains unpredictable and harsh. But there is sure to be an increase, which raises concerns for the environment.

"When it was covered in ice, this ecosystem was not threatened," says Provost. The Arctic is a unique and diverse ecosystem that is home to whales, seals, polar bears, walruses and several bird species.

"A massive oil spill like the one in the Gulf of Mexico in 2010 must never happen in the Arctic," he said. "The consequences would be much more serious."

Author: Clement Sabourin | Source: AFP [October 20, 2015]

Global populations of vertebrates -- mammals, birds, reptiles, amphibians, and fish -- have declined by 58 percent between 1970 and 2012, states a new report from World Wildlife Fund (WWF). Animals living in the world's lakes, rivers, and freshwater systems have experienced the most dramatic population declines, at 81 percent. Because of human activity, the report states that without immediate intervention global wildlife populations could drop two-thirds by 2020.

"This research delivers a wake-up call that for decades we've treated our planet as if it's disposable," said Carter Roberts, WWF president and CEO. "We created this problem. The good news is that we can fix it. It requires updating our approach to food, energy, transportation, and how we live our lives. We share the same planet. We rely on it for our survival. So we are all responsible for its protection."

The top threat to wildlife is habitat loss and degradation, driven primarily by increasing demand for food and energy. According to the report, global food production is the leading cause for destruction of habitats and overexploitation of wildlife. Agriculture currently occupies approximately one-third of Earth's total land area and accounts for 70 percent of all freshwater use.

Wild animals are not the only ones at risk; the report states that increased pressure threatens the natural resources that all life -- including humanity -- depend on.

The report demonstrates the need to rethink how we produce, consume, measure success and value the natural environment, and calls for an urgent system change by individuals, businesses and governments. The report also illustrates the positive momentum that is building by highlighting recent global agreements on climate change and sustainable development. In particular, the report recognizes the 2030 Agenda for Sustainable Development as an essential guide to decision-making that can ensure that the environment is valued alongside economic and social interests.

"A strong natural environment is the key to defeating poverty, improving health and developing a just and prosperous future," said Marco Lambertini, WWF director general. "We have proven that we know what it takes to build a resilient planet for future generations, we just need to act on that knowledge."

>Living Planet Report 2016: Risk and resilience in a new era is the eleventh edition of WWF's biennial flagship publication. The report tracks over 14,000 vertebrate populations of over 3,700 species from 1970 to 2012 and includes research from the Global Footprint Network and the Zoological Society of London.

Source: World Wildlife Fund [October 27, 2016]

A new study says that more than 17,000 marine species worldwide remain largely unprotected, with the U.S. among the bottom in supporting formal marine protected areas (MPAs) that could safeguard marine biodiversity.

The study, which is the first comprehensive assessment of protected areas coverage on marine life, appears in the international journal Scientific Reports. Authors include scientists from University of Queensland, the Australian Research Council Centre of Excellence for Environmental Decisions (CEED), UC Santa Barbara, the National Center for Ecological Analysis and Synthesis, Imperial College London and the Wildlife Conservation Society.

The authors looked at the ranges of some 17,348 species of marine life, including whales, sharks rays and fish, and found that 97.4 percent have less than 10 percent of their range represented in marine protected areas. Nations with the largest number of "gap species" or species whose range lie entirely outside of protected areas include the U.S., Canada, and Brazil.

Despite these dismal results, the authors say the study underscores opportunities to achieve goals set by the Convention on Biological Diversity to protect 10 percent of marine biodiversity by 2020. For example, the majority of species that were considered very poorly represented (less than two percent of their range found in marine protected areas) are found in exclusive economic zones. This suggests an important role for particular nations to better protect biodiversity.

"The process of establishing MPAs is not trivial as they impact livelihoods. It is essential that new MPAs protect biodiversity whilst minimizing negative social and economic impacts. The results of this study offer strategic guidance on where MPAs could be placed to better protect marine biodiversity." said the study's lead author Dr Carissa Klein of the University of Queensland and CEED.

The authors say that it is imperative that new MPAs are systematically identified and take into account what has already been protected in other places, in addition to socioeconomic costs of implementation, feasibility of success, other aspects driving biodiversity.

"The increase in the number MPAs in recent years is encouraging, but most of this increase has come from a few very large MPAs," said Dr. Ben Halpern of UC Santa Barbara and NCEAS. "Those very large MPAs provide important value, but they can be misleading in thinking that biodiversity is being well protected because of them. Species all around the planet need protection, not just those in some locations. Our results point out where the protection gaps exist."

Said co-author Dr. James Watson of WCS and the University of Queensland: "As most marine biodiversity remains extremely poorly represented, the task of implementing an effective network of MPAs is urgent. Achieving this goal is imperative for not just for nature but for humanity, as millions of people depend on marine biodiversity for important and valuable services."

Source: Wildlife Conservation Society [December 03, 2015]

The British Government is refusing to negotiate with Greece about the return of the so-called Elgin Marbles despite a request to do so from the United Nations, a decision that could prompt Athens to begin legal action for the first time.

British campaigners likened the UK’s stance to “clinging on to stolen booty for dear life” and contrasted it with the “generous act” of returning the sculptures to help a friendly country on the brink of economic collapse. Youth unemployment has hit 50 per cent and suicide rates have soared amid a crisis so severe the Financial Times has warned Greece could turn into a “quasi slave economy”.

In 2013, the United Nations Educational, Scientific and Cultural Organisation (UNESCO) invited the UK to take part in mediation about the marbles, created 2,500 years ago to decorate the Parthenon temple in Athens. Then last year it asked for a response by 31 March.

However a Government source said the UK “won’t be able to make any significant announcement this side of the [May] election”.

A motion calling for the UK to reply to Unesco and move to return the marbles is to be filed in the House of Commons on Monday.

The failure to respond in time could prompt Greece to abandon decades of diplomacy and take legal action, possibly in the European Court of Human Rights. A team of lawyers in London, including leading QC Geoffrey Robertson and Amal Clooney, wife of actor George, is preparing a “book-length” document setting out the options.

A source who has advised successive Greek governments said the main problem was finding a court to take jurisdiction in the case, but once that hurdle was overcome “then the lawyers are saying there is about a 75 to 80 per cent chance of success”.

The marbles are regarded as some of the finest works of art in history and a symbol of the birth of Western civilisation. Some sculptures were taken to Britain by Lord Elgin in controversial circumstances just over 200 years ago when Greece was ruled by the Ottoman Empire.

Dr Elena Korka, director of antiquities at the Greek Culture Ministry, said the central issue was “reunifying these exceptional, outstanding and most important sculptures, which belong as an integral part of a unique symbolic monument for the whole world”.

“This is the essence of it, making something which exists today as whole as it can be… this is what the public wants, every poll shows it. It’s such an important issue. Even if Greece didn’t ask for it, the whole world would,” she said.

She said if the British authorities relented it would be “a day of true joy, not only for the monument itself but I think for the value of the gesture for the sake of co-operation”. “It would definitely help the [public] morale. It would be a huge boost,” she said.

Asked about the prospect of legal action, Dr Korka said Greece was “still so much into the process of mediation that we’re not thinking of the next step”. “We haven’t exhausted the possibilities so let’s not go so fast,” she said.

She added that the UK’s silence since 2013 was “not so polite really”.

David Hill, chairman of the International Association for the Reunification of the Parthenon Sculptures in Australia, said there was a “growing appreciation even among people who are timid about the prospect of litigation that we have reached the point of last resort if this UNESCO gambit fails. The diplomatic and political strategies of the last 30 years have not produced any progress at all.”

Polls have consistently showed strong support in Britain for returning the marbles. In November, a survey for The Times found there was a two-to-one majority in favour.

Andrew George, chairman of Marbles Reunited and Liberal Democrat MP for St Ives, said: “One of our friends is down on their uppers and we can offer something to them that might make their lives easier and give them a lift, which can only be good for their economy.

“It would be a generous act which would improve Britain’s standing in the world. At the moment we look rather grubby… like we are clinging on to stolen booty for dear life.”

He said he planned to lodge an early day motion in the Commons tomorrow calling for  the Government to “demonstrate that Britain is prepared to... reunite these British-held Parthenon sculptures with those now displayed in the purpose-built Acropolis Museum in the shadow of the monument to which they belong, the Parthenon in Athens”.

The British Museum, which denies Elgin stole the marbles, argues that it “tells the story of cultural achievement throughout the world” and the Parthenon sculptures are “a significant part of that story”. It regards itself as “a unique resource for the world” with visitors able to “re-examine cultural identities and explore the complex network of interconnected human cultures” within its walls.

“The Parthenon Sculptures are a vital element in this interconnected world collection. They are a part of the world’s shared heritage and transcend political boundaries,” it says.

The Department for Culture, Media and Sport said it would “respond in due course” to UNESCO.

Author: Ian Johnston | Source: Indpendent [March 07, 2015]

Astronomers using ESO telescopes and other facilities have found clear evidence of a planet orbiting the closest star to Earth, Proxima Centauri. The long-sought world, designated Proxima b, orbits its cool red parent star every 11 days and has a temperature suitable for liquid water to exist on its surface. This rocky world is a little more massive than the Earth and is the closest exoplanet to us -- and it may also be the closest possible abode for life outside the Solar System. A paper describing this milestone finding will be published in the journal Nature on 25 August 2016.

Just over four light-years from the Solar System lies a red dwarf star that has been named Proxima Centauri as it is the closest star to Earth apart from the Sun. This cool star in the constellation of Centaurus is too faint to be seen with the unaided eye and lies near to the much brighter pair of stars known as Alpha Centauri AB.

During the first half of 2016 Proxima Centauri was regularly observed with the HARPS spectrograph on the ESO 3.6-metre telescope at La Silla in Chile and simultaneously monitored by other telescopes around the world >[1]. This was the Pale Red Dot campaign, in which a team of astronomers led by Guillem Anglada-Escudé, from Queen Mary University of London, was looking for the tiny back and forth wobble of the star that would be caused by the gravitational pull of a possible orbiting planet >[2].

As this was a topic with very wide public interest, the progress of the campaign between mid-January and April 2016 was shared publicly as it happened on the Pale Red Dot website and via social media. The reports were accompanied by numerous outreach articles written by specialists around the world.

Guillem Anglada-Escudé explains the background to this unique search: "The first hints of a possible planet were spotted back in 2013, but the detection was not convincing. Since then we have worked hard to get further observations off the ground with help from ESO and others. The recent Pale Red Dot campaign has been about two years in the planning."

The Pale Red Dot data, when combined with earlier observations made at ESO observatories and elsewhere, revealed the clear signal of a truly exciting result. At times Proxima Centauri is approaching Earth at about 5 kilometres per hour -- normal human walking pace -- and at times receding at the same speed. This regular pattern of changing radial velocities repeats with a period of 11.2 days. Careful analysis of the resulting tiny Doppler shifts showed that they indicated the presence of a planet with a mass at least 1.3 times that of the Earth, orbiting about 7 million kilometres from Proxima Centauri -- only 5% of the Earth-Sun distance >[3].

Guillem Anglada-Escudé comments on the excitement of the last few months: "I kept checking the consistency of the signal every single day during the 60 nights of the Pale Red Dot campaign. The first 10 were promising, the first 20 were consistent with expectations, and at 30 days the result was pretty much definitive, so we started drafting the paper!"

Red dwarfs like Proxima Centauri are active stars and can vary in ways that would mimic the presence of a planet. To exclude this possibility the team also monitored the changing brightness of the star very carefully during the campaign using the ASH2 telescope at the San Pedro de Atacama Celestial Explorations Observatory in Chile and the Las Cumbres Observatory telescope network. Radial velocity data taken when the star was flaring were excluded from the final analysis.

Although Proxima b orbits much closer to its star than Mercury does to the Sun in the Solar System, the star itself is far fainter than the Sun. As a result Proxima b lies well within the habitable zone around the star and has an estimated surface temperature that would allow the presence of liquid water. Despite the temperate orbit of Proxima b, the conditions on the surface may be strongly affected by the ultraviolet and X-ray flares from the star -- far more intense than the Earth experiences from the Sun >[4].

Two separate papers discuss the habitability of Proxima b and its climate. They find that the existence of liquid water on the planet today cannot be ruled out and, in such case, it may be present over the surface of the planet only in the sunniest regions, either in an area in the hemisphere of the planet facing the star (synchronous rotation) or in a tropical belt (3:2 resonance rotation). Proxima b's rotation, the strong radiation from its star and the formation history of the planet makes its climate quite different from that of the Earth, and it is unlikely that Proxima b has seasons.

This discovery will be the beginning of extensive further observations, both with current instruments >[5] and with the next generation of giant telescopes such as the European Extremely Large Telescope (E-ELT). Proxima b will be a prime target for the hunt for evidence of life elsewhere in the Universe. Indeed, the Alpha Centauri system is also the target of humankind's first attempt to travel to another star system, the StarShot project.

Guillem Anglada-Escudé concludes: "Many exoplanets have been found and many more will be found, but searching for the closest potential Earth-analogue and succeeding has been the experience of a lifetime for all of us. Many people's stories and efforts have converged on this discovery. The result is also a tribute to all of them. The search for life on Proxima b comes next..."

>Notes

>[1] Besides data from the recent Pale Red Dot campaign, the paper incorporates contributions from scientists who have been observing Proxima Centauri for many years. These include members of the original UVES/ESO M-dwarf programme (Martin Kürster and Michael Endl), and exoplanet search pioneers such as R. Paul Butler. Public observations from the HARPS/Geneva team obtained over many years were also included.

>[2] The name Pale Red Dot reflects Carl Sagan's famous reference to the Earth as a pale blue dot. As Proxima Centauri is a red dwarf star it will bathe its orbiting planet in a pale red glow.

>[3] The detection reported today has been technically possible for the last 10 years. In fact, signals with smaller amplitudes have been detected previously. However, stars are not smooth balls of gas and Proxima Centauri is an active star. The robust detection of Proxima b has only been possible after reaching a detailed understanding of how the star changes on timescales from minutes to a decade, and monitoring its brightness with photometric telescopes.

>[4] The actual suitability of this kind of planet to support water and Earth-like life is a matter of intense but mostly theoretical debate. Major concerns that count against the presence of life are related to the closeness of the star. For example gravitational forces probably lock the same side of the planet in perpetual daylight, while the other side is in perpetual night. The planet's atmosphere might also slowly be evaporating or have more complex chemistry than Earth's due to stronger ultraviolet and X-ray radiation, especially during the first billion years of the star's life. However, none of the arguments has been proven conclusively and they are unlikely to be settled without direct observational evidence and characterisation of the planet's atmosphere. Similar factors apply to the planets recently found around TRAPPIST-1.

>[5] Some methods to study a planet's atmosphere depend on it passing in front of its star and the starlight passing through the atmosphere on its way to Earth. Currently there is no evidence that Proxima b transits across the disc of its parent star, and the chances of this happening seem small, but further observations to check this possibility are in progress.

This research is >published in the journal Nature.

Source: European Southern Observatory (ESO) [August 25, 2016]

The Greek government has finally acknowledged that the British Museum is the lawful owner of the “Elgin Marbles”. That, at least, is the logical conclusion of the recent news that Greece has dropped its legal claim to the Parthenon Sculptures.

The surprise announcement came only 48 hours after Amal Clooney and the team at London’s Doughty Street Chambers sent the Greek government a 150-page report admitting that there was only a 15% chance of their success in a British court, and that Greece should consider pursuing the claim at the International Court of Justice. However, quite understandably, the Greek government has decided that what Clooney is really saying is that they have no case.

The Syriza government is keenly aware that British courts are recognized the world over for their experience in resolving international disputes, including those involving British interests and institutions. So, quite reasonably, the new Greek government has concluded that an international court will probably not reach a different conclusion. Nikos Xydakis, culture minister, has therefore announced that Greece will drop its legal claim and pursue “diplomatic and political” avenues instead.

This is unsurprising, as — contrary to the widespread misconception — there was nothing illegal about the way in which Lord Elgin saved the Parthenon Sculptures from acute ongoing destruction. The mauling had started when the Greek church smashed up a large number of the ancient temple’s carvings in the fifth century. The Venetians then blew up chunks of the building in 1687. And in the 1800s, when Lord Elgin arrived in Athens, the occupying Ottomans were grinding the sculptures up for limestone and using them for artillery target practice.

Elgin had intended to commission casts and paintings of the sculptures, but when he saw firsthand the ongoing damage (about 40% of the original sculptures had been pulverised), he acquired an export permit from the Ottoman authorities in Athens, and brought as many as he could back to safety in Britain. It was a personal disaster which bankrupted him, but it has meant that, since 1816, the British Museum has been able to share with its visitors some of the best-preserved Parthenon Sculptures in the world.

What is usually missing in the emotion of the Elgin Marbles debate is that the British Museum is a universal museum, which tells the story of humanity’s cultural achievements from the dawn of time. In this, the work of the Ancient Greek department is world leading, and part of a network of museum classicists — including those from the New Acropolis Museum in Athens — who work together collaboratively, sharing their knowledge and passion for the classical world with the widest possible public.

Coincidentally, the British Museum (the nation’s largest tourist attraction) is currently hosting a once-in-a-lifetime exhibition of Greek sculpture, drawing on its own collection and generous loans from other museums all over the world to showcase the evolution of ancient Greek ideas about beauty and the human body. In this breathtaking visual story of the march of classical ideas about aesthetics, the Parthenon Sculptures take their place, contributing eloquently to the state of sculpture in the golden age of Athenian carving under Pheidias.

The overarching misconception we need to get over is that museum objects belong uniquely to the country in which they were created. If that was so, the world should empty out its leading museums of the foreign artefacts they have purchased or been donated. Athens would be no exception in this, and would be required to return their extensive collections of Egyptian, Chinese, Islamic, and South American art.

Of course, it is an absurd idea. The world is manifestly enhanced by museums and their depth of specialised knowledge. They are, above all, educational places that enrich us all. The fact that half the surviving sculptures from the Parthenon can be seen in Athens, with the remaining half split between London, Berlin, Munich, Würzburg, Copenhagen, the Vatican, and — thanks to the British Museum — the Hermitage in St Petersburg earlier this year, ensures that the widest possible audience is able to experience for themselves the unique and bewitching ability of fifth-century Athenians to convert rough stone into warm, living flesh.

Another page has turned definitively in the story of the Parthenon Sculptures. The idea that Lord Elgin or Parliament did something illegal has finally been dropped, and not before time. Now the debate can proceed in a less antagonistic manner, and everyone can acknowledge that it is a question of politics, not looted artefacts.

As the world has recently discovered from the tragic destruction of Assyrian art at Nimrud, Mosul, and elsewhere in the Middle East, the planet’s heritage does not last unless someone looks after it. And so far, in the case of the Parthenon Sculptures (and indeed its holdings of Assyrian sculpture), the British Museum continues to do the world an enormous service

Author: Dominic Selwood | Source: The Telegraph [May 14, 2015]

The first eukaryote is thought to have arisen when simpler archaea and bacteria joined forces. But in an Opinion paper published in >Trends in Cell Biology, researchers propose that new genomic evidence derived from a deep-sea vent on the ocean floor suggests that the molecular machinery essential to eukaryotic life was probably borrowed, little by little over time, from those simpler ancestors.

"We are beginning to think of eukaryotic origins as a slow process of growing intimacy--the result of a long, slow dance between kingdoms, and not a quick tryst, which is the way it is portrayed in textbooks," says Mukund Thattai of the National Centre for Biological Sciences in India.

The eukaryotic cells of plants, animals, and protists are markedly different from those of their single-celled, prokaryotic relatives, the archaea and bacteria. Eukaryotic cells are much larger and have considerably more internal complexity, including many internal membrane-bound compartments.

Although scientists generally agree that eukaryotes can trace their ancestry to a merger between archaea and bacteria, there's been considerable disagreement about what the first eukaryote and its immediate ancestors must have looked like. As Thattai and his colleagues Buzz Baum and Gautam Dey of University College London explain in their paper, that uncertainty has stemmed in large part from the lack of known intermediates that bridge the gap in size and complexity between prokaryotic precursors and eukaryotes. As a result, they say, the origin of the first eukaryotic cell has remained "one of the most enduring mysteries in modern biology."

That began to change last year with the discovery of DNA sequences for an organism that no one has ever actually seen living near a deep-sea vent on the ocean floor. The genome of the archaeon known as Lokiarchaeum ('Loki' for short) contains more "eukaryotic signature proteins" (ESPs) than any other prokaryote. Importantly, among those ESPs are proteins (small Ras/Arf-type GTPases) critical for eukaryotes' ability to direct traffic amongst all those intercellular compartments.

The authors consider the available data to explore an essential question: what might the archaeal ancestor of all eukaryotes look like? "If we could turn back the clock and peer inside this cell, would its cellular organization have been like that of an archaeal cell or more eukaryote-like?" Dey says.

As the closest known archaeal relative of eukaryotes, Loki helps to answer that question. The researchers say that the ESPs found in Loki are unlikely to work in the same way they do in eukarytoes. That's because Loki doesn't appear to have enzymes required for ESP association with membranes or key building blocks of the membrane trafficking machinery.

"However," Baum says, "the genome can be seen as 'primed' for eukaryogenesis. With the acquisition of a number of key genes and lipids from a bacterial symbiont, it would be possible for Loki-type cells to evolve a primitive membrane trafficking machinery and compartmentalization."

The researchers predict that, when Loki is finally isolated or cultured, "it will look more like an archaeon than a proto-eukaryote and will not have internal compartments or a vesicle-trafficking network." But its morphology and/or cell cycle might have complexities more often associated with eukaryotes.

Baum and Dey say they now plan to explore the basic cell biology of the related archaea Sulfolobus acidocaldarius, first isolated from an acidic hot spring in Yellowstone National Park.

"We believe it will be very difficult to crack the mysteries of eukaryogenesis without first understanding the archaeal cell biology," Dey says. "We are currently developing tools in the lab to study the cell cycle and cellular morphology of Sulfolobus at the single-cell level under the microscope. We would also love to catch a glimpse of Loki."

Source: Cell Press [June 16, 2016]