It is an archaeological enigma which last week a team of experts professed to have resolved: if and how the ‘bluestones’ at Stonehenge were excavated and transported from Pembrokeshire by our prehistoric ancestors.

The team of archaeologists and geologists – led academics from University College, London, said they definitively confirmed two sites in the Preseli Hills – Carn Goedog and Craig Rhos-y-felin - had been quarried for two types of stone.

It was suggested the stones were first used in a local monument, somewhere near the quarries, that was then dismantled and dragged off to Wiltshire.

But the assertions on how the stones were removed and transported, apparently leaving evidence so-called “engineering features,” have been branded “all wrong” by another team of earth scientists, in a conflicting report published today.

In a peer-reviewed paper published in the Archaeology in Wales journal, Dr Brian John, Dr Dyfed Elis-Gruffydd and John Downes say there are “no traces of human intervention in any of the features that have made the archaeologists so excited”.

The group does not accept the idea of a Neolithic quarry in the Preseli Hills and says the supposed signs of ‘quarrying’ by humans at Craig Rhos-y-Felin were entirely natural.

They also believe that the archaeologists behind the report may have inadvertently created certain features during five years of “highly selective sediment removal”.

“This site has been described by lead archaeologist Prof Mike Parker Pearson as ‘the Pompeii of prehistoric stone quarries’ and has caused great excitement in archaeological circles,” says the report.

“The selection of this rocky crag near the village of Brynberian for excavation in 2011-2015 was triggered by the discovery by geologists Richard Bevins and Rob Ixer that some of the stone fragments in the soil at Stonehenge were quite precisely matched to an unusual type of foliated rhyolite found in the crag.

“This led the archaeologists to conclude that there must have been a Neolithic quarry here, worked for the specific purpose of cutting out monoliths for the bluestone settings at Stonehenge.”

But Dr John is increasingly convinced that the rhyolite debris at Stonehenge comes from glacial erratics which were eroded from the Rhosyfelin rocky crag almost half a million years ago by the overriding Irish Sea Glacier and then transported eastwards by ice towards Salisbury Plain.

In his paper written with Dr Dyfed Elis-Gruffydd and John Downes, he says: “It is suggested, on the basis of careful examinations of this site, that certain of the “man made features” described have been created by the archaeologists themselves through a process of selective sediment and clast removal.

“An expectation or conviction that ‘engineering features’ would be found has perhaps led to the unconscious fashioning of archaeological artifices.

“While there appears to be no landform, rock mechanics or sedimentary evidence that this was a Neolithic quarry site devoted to the extraction of bluestone orthostats destined for use at Stonehenge, or for any other purpose, we would accept the possibility that there may have been temporary Mesolithic, Neolithic or later camp sites here over a very long period of time, as in many other sheltered and wooded locations in north Pembrokeshire.”

Commenting on the research paper published last week, Dr Brian John added: “The new geological work at Rhosyfelin and Stonehenge is an interesting piece of ‘rock provenencing’ – but it tells us nothing at all about how monoliths or smaller rock fragments from West Wales found their way to Stonehenge.

“We are sure that the archaeologists have convinced themselves that the glacial transport of erratics was impossible. We are not sure where they got that idea from.

“On the contrary, there is substantial evidence in favour of glacial transport and zero evidence in support of the human transport theory. We accept that there might have been a camp site at Rhosyfelin, used intermittently by hunters over several millennia. But there is no quarry.

“We think the archaeologists have been so keen on telling a good story here that they have ignored or misinterpreted the evidence in front of them.

“That’s very careless. They now need to undertake a complete reassessment of the material they have collected.”

Further excavations of the quarries are planned for 2016.

Author: Rachael Misstear | Source: Wales Online [December 14, 2015]

Rope-way, Thames, London

In London constantly are under construction the most modern infrastructural objects of type of new Wembley Stadium or the Big London Eye, but there never was a rope-way. However this city lack will be fast eliminated. The Mace Group has declared the intention to construct the 1st cable car in London.
Today, the capital of Great Britain actively prepares for 2012 Summer Olympic Games. All forces and all city resources are thrown on creating an infrastructure necessary for this grand action. And, if artificial clouds, most likely, are not constructed — the rope-way will appear in this city by next summer.

Legendary Mace Group Projects

Mace Group company is known in London thanks to infrastructural projects of a new formation. It has erected already mentioned big wheel the London Eye, the London City-Hall (residence of Administration of the Greater London), skyscraper «Shard London Bridge» and many other architectural objects. Thus, in a year, in the track record of Mace Group will also the first rope-way in London.

One station of this new kind of the London transport will be on the Greenwich Peninsula near huge entertainment complex «O2». The second — on other party of Thames, around the central input in the British Museum. The length of this cable car: about 1 km. There are suspicions that a cable car will use, first of all, not as public transport, and as tourist way.

The world's attention is now on Proxima Centauri b, a possibly Earth-like planet orbiting the closest star, 4.22 light-years away. The planet's orbit is just right to allow liquid water on its surface, needed for life. But could it in fact be habitable?

If life is possible there, the planet evolved very different than Earth, say researchers at the University of Washington-based Virtual Planetary Laboratory (VPL) where astronomers, geophysicists, climatologists, evolutionary biologists and others team to study how distant planets might host life.

Astronomers at Queen Mary University in London have announced discovery of Proxima Centauri b, a planet orbiting close to a star 4.22 light-years away. The find has been called "the biggest exoplanet discovery since the discovery of exoplanets."

Rory Barnes, UW research assistant professor of astronomy, published a discussion about the discovery at palereddot.org, a website dedicated to the search for life around Proxima Centauri. His essay describes research underway through the UW planetary lab -- part of the NASA Astrobiology Institute -- to answer the question, is life possible on this world?

"The short answer is, it's complicated," Barnes writes. "Our observations are few, and what we do know allows for a dizzying array of possibilities" -- and almost as many questions.

The Virtual Planetary Laboratory is directed by Victoria Meadows, UW professor of astronomy. UW-affiliated researchers include Giada Arney, Edward Schwieterman and Rodrigo Luger. Using computer models, the researchers studied clues from the orbits of the planet, its system, its host star and apparent companion stars Alpha Centauri A and B -- plus what is known of stellar evolution to begin evaluating Proxima b's chances.

Relatively little is known about Proxima:

• It's at least as massive as Earth and may be several times more massive, and its "year" -- the time it takes to orbit its star -- is only 11 days

• Its star is only 12 percent as massive as our sun and much dimmer (so its habitable zone, allowing liquid water on the surface, is much closer in) and the planet is 25 times closer in than Earth is to our sun

• The star may form a third part of the Alpha Centauri binary star system, separated by a distance of 15,000 "astronomical units," which could affect the planet's orbit and history

• The new data hint at the existence of a second planet in the system with an orbital period near 200 days, but this has not been proven

Perhaps the biggest obstacle to life on the planet, Barnes writes, is the brightness of its host star. Proxima Centauri, a red dwarf star, is comparatively dim, but wasn't always so.

"Proxima's brightness evolution has been slow and complicated," Barnes writes. "Stellar evolution models all predict that for the first one billion years Proxima slowly dimmed to its current brightness, which implies that for about the first quarter of a billion years, planet b's surface would have been too hot for Earth-like conditions."

Barnes notes that he and UW graduate student Rodrigo Luger recently showed that had modern Earth been in such a situation, "it would have become a Venus-like world, in a runaway greenhouse state that can destroy all of the planet's primordial water," thus extinguishing any chance for life.

Next come a host of questions about the planet's makeup, location and history, and the team's work toward discerning answers.

• Is the planet "rocky" like Earth? Most orbits simulated by the planetary lab suggest it could be -- and thus can host water in liquid form, a prerequisite for life

• Where did it form, and was there water? Whether it formed in place or farther from its star, where ice is more likely, VPL researchers believe it is "entirely possible" Proxima b could be water-rich, though they are not certain.

• Did it start out as a hydrogen-enveloped Neptune-like planet and then lose its hydrogen to become Earth-like? VPL research shows this is indeed possible, and could be a viable pathway to habitability

• Proxima Centauri flares more often than our sun; might such flares have long-since burned away atmospheric ozone that might protect the surface and any life? This is possible, though a strong magnetic field, as Earth has, could protect the surface.

Also, any life under even a few meters of liquid water would be protected from radiation.

Another concern is that the planet might be tidally locked, meaning one side permanently faces its star, as the moon does Earth. Astronomers long thought this to mean a world could not support life, but now believe planetwide atmospheric winds would transport heat around the planet.

"These questions are central to unlocking Proxima's potential habitability and determining if our nearest galactic neighbor is an inhospitable wasteland, an inhabited planet, or a future home for humanity," Barnes writes.

Planetary laboratory researchers also are developing techniques to determine whether Proxima b's atmosphere is amenable to life.

"Nearly all the components of an atmosphere imprint their presence in a spectrum (of light)," Barnes writes. "So with our knowledge of the possible histories of this planet, we can begin to develop instruments and plan observations that pinpoint the critical differences."

At high enough pressures, he notes, oxygen molecules can momentarily bind to each other to produce an observable feature in the light spectrum.

"Crucially, the pressures required to be detectable are large enough to discriminate between a planet with too much oxygen, and one with just the right amount for life.

As we learn more about the planet and the system, we can build a library of possible spectra from which to quantitatively determine how likely it is that life exists on planet b."

Our own sun is expected to burn out in about 4 billion years, but Proxima Centauri has a much better forecast, perhaps burning for 4 trillion years longer.

"If Proxima b is habitable, then it might be an ideal place to move. Perhaps we have just discovered a future home for humanity. But in order to know for sure, we must make more observations, run many more computer simulations and, hopefully, send probes to perform the first direct reconnaissance of an exoplanet," Barnes writes. "The challenges are huge, but Proxima b offers a bounty of possibilities that fills me with wonder."

Proxima Centauri b may be the first exoplanet to be directly characterized by powerful ground- and space-based telescopes planned for the future, and its atmosphere spectroscopically probed for active biology. The research was funded by the NASA Astrobiology Institute. "Whether habitable or not," Barnes concludes, "Proxima Centauri b offers a new glimpse into how the planets and life fit into our universe."

Author: Peter Kelley | Source: University of Washington [August 30, 2016]

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]

The destruction at the ancient city of Palmyra symbolises the suffering of the Syrian people at the hands of the terrorist group known as Islamic State (IS). Palmyra was a largely Roman city located at a desert oasis on a vital crossroad, and “one of the most important cultural centres of the ancient world”. Its remarkable preservation highlighted an intermingling of cultures that today, as then, came to stand for the tolerance and multiculturalism that pre-conflict Syria was renowned for -– tolerance that IS seeks to eradicate.

Early in the conflict, the area was heavily fortified. Roads and embankments were dug through the necropolises and the Roman walls, and the historic citadel defences were upgraded. Yet the terrorists occupied and desecrated the city from May 2015, systematically destroying monuments such as the Temple of Baalshamin, the Temple of Bel, seven tower tombs, a large Lion goddess statue and two Islamic shrines. They ransacked the museum, tortured and executing the former site director Khaled al-Asaad in search of treasure to sell. According to satellite imagery analysis the site was heavily looted throughout it all.

Now the city has been recaptured, the first damage assessments are underway, and Syrian – and international – attention is already turning to restoration. This work will be greatly aided by the Syrians who risked their lives to transport the contents of the Palmyra museum to safety. The last truck pulled out as IS arrived, with bullets whizzing past.

Even as they were displaced, Syrians have worked to keep a detailed memory of the city alive. Syrian artists created artworks depicting the destruction. In a Jordanian camp, refugees made miniature models of the city and other cultural sites, even measuring out the number and position of Palmyra’s columns from photographs.

The international community is also playing its part. Groups like UNOSAT, the UN’s satellite imagery analysts have used satellite imagery to monitor the damage. On the ground, Syrian-founded NGOs like APSA have linked with universities to assess the site. Groups such as NewPalmyra and Palmyra 3D Model are using the latest technology to create open-access 3D computer models from photographs.

Others have gone even further. The Million Image Database Project at the Oxford Institute for Digital Archaeology distributed cameras to volunteers across the Middle East to collect 3D photos of sites. As well as creating 3D models, they will recreate full-scale artefacts, sites, and architectural features using their own cement-based 3D printing techniques. This will start with a recreation of the arch from Palmyra’s Temple of Bel, due to be unveiled in London in April 2016.

Ethics of restoration

As well as being used for research, education and enjoyment, this technology could recreate (and perhaps ultimately restore) what IS has destroyed. 3D printing can be done in any colour of shapeable material, and can be as obvious – or as unobtrusive – as desired. The group is also exploring using computer-guided tools to quickly carve their models into stone.

It wouldn’t be the first time such large-scale restoration has been undertaken. Historic central Warsaw, for example, was destroyed during World War II, and was almost completely reconstructed and is now a World Heritage site. Reconstruction is costly, but might be accomplished more quickly and cheaply using new digital techniques, showing the world that Syria values its cultural heritage.

But many argue that 3D printing fails to capture the authenticity of the original structures, amounting to little more than the Disneyfication of heritage. They also point out that the fighting is still ongoing: 370,000 Syrians are dead, millions are displaced, and perhaps 50%-70% of the nearby town has been destroyed. Given the pressing humanitarian needs, stabilisation alone should be the priority for now.

Rebuilding also fails to redress the loss caused by the extensive looting of the site, focusing only on the dramatically destroyed monuments. Perhaps most importantly, its worth asking whether returning Palmyra exactly to its pre-conflict state denies a major chapter of its history? There needs to be a wide-ranging discussion on the priorities for the immediate future and the nature of any future reconstruction.

As has happened after previous conflicts, there may need to be a memorial as a testimony to those beheaded in the arena, or tied to columns that were detonated, or to the former site director executed in trying to protect this site that was so important to him. These stories, and many more, are a part of Palmyra’s, and Syria’s, history.

One thing is clear: while Palmyra may hold great significance to the world, the final decision should belong to those who have lived alongside it, cared for it, managed it, fought for it, and protected it for generations: the Syrian people.

Author: Emma Cunliffe, University Of Oxford | Source: The Conversation [March 31, 2016]

Archaeologists have uncovered a stone grinding tool in southern Italy which shows signs it was used to make flour that was boiled into gruel or baked into bread.

The discovery, which predates the dawn of farming, suggests that stone age man's first cultivated meal may have been a bowl of porridge made from grains growing wild and is the earliest known instance of human consumption of oats.

The find was made by a team led by Marta Mariotti Lippi at the University of Florence in Italy who made analysed starch grains found on the artefact.

They found evidence that the stone's creators also heated the grains before grinding them, perhaps to dry them out in the colder climate of the time and make the grain easier to grind and longer-lasting.

This multi-stage process would have been time consuming, but beneficial, while turning it into flour would have been a good way to transport it, which was important for Palaeolithic nomads.

Evidence of porridge consumption in Scotland dates back to 4,000 BC, when oats and other grains began to be cultivated by the first farmers.

Mariotti Lippi’s team hopes to continue studying ancient grinding stones to find out more about the stone age plant diet.

The stone was found in the Grotta Paglicci, Apulia, which was home to stone age hunter gatherers between 34,000 and 32,000 years ago and contains mural paintings, depicting horses and handprints. Images of goats, cows, a serpent, a nest with eggs, and a hunting scene have also been found engraved on bone.

Archaeologist Matt Pope, of University College London, said that the find shed light on the diet of early humans and the spread of food cultivation.

He said: “There is a relationship there to be explored between diet, experimentation with processing plant food and cultural sophistication.

“We’ve had evidence of the processing of roots and cattails, but here we’ve got a grain, and a grain that we’re very familiar with.

“If we were to look more systematically for ground stone technology we would find this is a more widespread phenomenon.”

The study is published in Proceedings of the National Academy of Sciences.

Author: Jody Harrison | Source: Herald Scotland [September 08, 2015]

Trekking across the high Canadian Arctic almost 20 years ago, Howie Scher had an unexpected encounter that helped fix the course of his career.

An undergraduate on a research expedition over summer break, Scher was part of a scientific group traveling deep into the Arctic Circle to collect basalt cores for paleomagnetic analysis. But as focused as the team was on finding rocks with magnetic minerals that can help establish where on Earth they had formed, it was stony deposits that had once been very much alive that really caught the team's collective eye.

"We stumbled across a fossil bone bed there," Scher says. "We were pulling out vertebrate fossils--crocodilians, turtles, bony fish--and when we got home we showed them to a paleontologist who told us it was a warm water assemblage. That was a great experience as a freshman in college, and it got me very interested in climate--just seeing how it had been so different in the past than what my experience was near the North Pole, trudging through the snow."

Now an associate professor at the University of South Carolina, Scher has made a career of climate science. He is part of an international team that recently published a report pinpointing the genesis of one of the cornerstones of the Earth's current climate system, the Antarctic Circumpolar Current.

A constant eastward flow of ocean water in the Southern Ocean encircling Antarctica, the Antarctic Circumpolar Current is akin to the Gulf Stream, the current that moves water through the Atlantic Ocean from the tip of Florida, along the east coast of North America, and, by extension into the North Atlantic Current, to the shores of western and northern Europe. The Gulf Stream's transport of warm southern waters northward is why many European countries have more temperate climates than would be expected purely from their latitudes (relatively mild London, for example, lies more than 500 miles further north than Toronto).

But if the Atlantic Circumpolar Current is something like the Gulf Stream, there's a notable difference: it's even bigger.

"It's the largest ocean current today, and it's the only one that connects all the ocean basins," Scher says. "The Atlantic, Pacific and the Indian are huge oceans, but they're all bounded by continents; they have firm boundaries. The Southern Ocean, around Antarctica, is the only band of latitude where there's an ocean that goes continuously around the globe. Because of that, the winds that blow over the Southern Ocean are unimpeded by continental barriers.

"So the distance that the wind can blow over the ocean, which as oceanographers we call the 'fetch,' is infinite. And fetch is one of the things that determines how high the waves are, how much mixing goes on in the oceans, and ultimately what drives surface ocean currents. With infinite fetch, you can have a very strong ocean current, and because this particular band of ocean connects all of the world's oceans, it transports heat and salt and nutrients all around the world."

In a paper recently published in the journal Nature, Scher and his team make the case for just when this massive ocean current first started flowing. One straightforward obstacle in the distant past was the arrangement of continental masses. Antarctica and Australia were part of a single super-continent, Gondwana, and began to separate about 83 million years ago, so the Pacific and Indian Oceans couldn't have been in contact near the South Pole before then.

It was much later than the initial separation of Australia and Antarctica that deep ocean currents could flow between the two continents, though. Paleoceanographers have identified a transition, the opening of the Tasmanian gateway, a deep-water channel between Tasmania and Antarctica, as being a necessary part of any large-scale, sustained flow on the order of the Antarctic Circumpolar Current.

Using novel information about the separation of Antarctica and Australia, Scher and his team developed a tectonic model that showed that the Tasmanian gateway first developed at least 500 meters of depth some time between 35 and 32 million years ago.

From geochemical analyses of sediment core, however, they concluded that the channel opening to that depth wasn't enough to get the Antarctic Circumpolar Current flowing. The Pacific Ocean is in contact with much younger rock than the Indian Ocean, Scher says, which leads to a distinguishing concentration in each ocean of one isotope of neodymium that has a half-life longer than that of the solar system.

By measuring neodymium isotope compositions incorporated into fish teeth fossils in core samples, the team was able to establish that eastward current flow between the Pacific and Indian Oceans didn't begin until about 30 million years ago, some 2 to 5 million years after the Tasmanian gateway opened.

Taking both geophysical and geochemical data into account, they conclude that although the Tasmanian gateway was wide enough to accommodate a deep current, the gateway was located too far south to be in contact with the mid-latitude trade winds, which are the driving force for today's eastward-flowing Antarctic Circumpolar Current.

Instead, when the gateway first opened, water initially flowed westward, the opposite of that today, in keeping with the prevailing polar winds located at the more southern latitudes.

Only as both continents, and the gateway between the two, drifted northward on their tectonic plates over the next several million years did alignment with the trade winds come about. That reversed the current flow, to the east, and the Antarctic Circumpolar Current was born.

"It's the global mix-master of the oceans--that's a quote from Wally Broecker [of Columbia University's Lamont-Doherty Earth Observatory], and that's what it's been called by oceanographers for 50 years now," Scher says. "The Antarctic Circumpolar Current is the world's largest current today, it influences heat exchange and carbon exchange, and we really didn't know for how long it's been operating, which I call a major gap in our command of Earth history. It was a cool outcome."

Author: Steven Powell  | Source: University of South Carolina [August 25, 2015]

The Department of Antiquities, Ministry of Transport, Communications and Works, announced that an ancient clay figurine has been repatriated to Cyprus from the United Kingdom. The clay figurine depicts a horse and rider/warrior and dates to the Cypro-Archaic period (approximately 700 BC).

The figurine was identified by the Department of Antiquities on the website of a London-based antiquities dealer’s shop. Following a request by the Department of Antiquities and the Cyprus Police, the shop handed over the figurine to the London Metropolitan Police, which in turn, returned it to the Department of Antiquities in July 2016.

The figurine was part of Mr Christakis Hadjiprodromou’s registered private collection that was kept in his house in Ammochostos (Famagusta) prior to the Turkish invasion in 1974. As a result of the invasion, Mr Hadjiprodromou’s residence was pillaged and his collection was looted, with its objects being scattered around the world.

Source: Press and Information Office, Ministry of Interior, Republic of Cyprus [August 06, 2016]

Type of entry: Billboards & Street Furniture;
Category: Travel, Transport & Tourism;
Product/Service: EXPEDIA CITY BREAKS;
Agency: OGILVY & MATHER LONDON, UNITED KINGDOM;
Gerry Human (Executive Creative Director);
Laura Rogers (Copywriter);
Trevallyn Hall (Art Director);
Keita Sagaki (Illustrator);
Trevallyn Hall (Typographer);
Brigette Martin (Art Buyer);
Stephen Hillcoat (Account Supervisor);
Andrew Warner (Advertiser's Supervisor);
Grant Mason - Traffic Manager (Other Credits).

Virgin Atlantic Airways Economy Class

Virgin Atlantic offers travelers non-stop flights from Joburg to London. The ad from Y&R South Africa had to be quick and effortless, just like flying with Virgin Atlantic.

Category: Travel, transport & tourism;
Client: Virgin Atlantic;
Agency: Y&R South Africa;
Country: South Africa;
Chief Creative Officer: Graham Lang;
Executive Creative Director: Rui Alves;
Creative Director: Bibi Lotter;
Art Director: Rowan Foxcroft.