Evidence Found for Planet-Cooling Asteroid 12,900 Years Ago

The dust refuses to settle on a debate about whether asteroid impacts caused one of Earth’s most famous cold snaps 12,900 years ago.

The latest evidence in the contentious discussion comes in the form of pieces of bedrock from Quebec, Canada, that seem to have been blasted out as far as Pennsylvania. “I’d say there’s evidence of an impact happening, for sure,” says Mukul Sharma, an isotope geochemist at Dartmouth College in Hanover, New Hampshire, and co-author of a study published this week in Proceedings of the National Academy of Sciences.

Gravity variations much bigger than previously thought

A joint Australian-German research team led by Curtin University's Dr Christian Hirt has created the highest-resolution maps of Earth's gravity field to date - showing gravitational variations up to 40 per cent larger than previously assumed.

Using detailed topographic information obtained from the US Space Shuttle, a specialist team including Associate Professor Michael Kuhn, Dr Sten Claessens and Moritz Rexer from Curtin's Western Australian Centre for Geodesy and Professor Roland Pail and Thomas Fecher from Technical University Munich improved the resolution of previous global gravity field maps by a factor of 40.

Milky Way Gas Cloud Causes Multiple Images of Distant Quasar

For the first time, astronomers have seen the image of a distant quasar split into multiple images by the effects of a cloud of ionized gas in our own Milky Way Galaxy. Such events were predicted as early as 1970, but the first evidence for one now has come from the National Science Foundation's Very Long Baseline Array (VLBA) radio telescope system.

The scientists observed the quasar 2023+335, nearly 3 billion light-years from Earth, as part of a long-term study of ongoing changes in some 300 quasars. When they examined a series of images of 2023+335, they noted dramatic differences. The differences, they said, are caused by the radio waves from the quasar being bent as they pass through the Milky Way gas cloud, which moved through our line of sight to the quasar.

The Milky Way Supernova You've Never Heard Of

Every year astronomers see hundreds of supernovae erupt in other galaxies, but from such great distances these stellar explosions look only like bright dots. Researchers therefore prize the few supernovae that past observers witnessed in the Milky Way, where telescopes can scrutinize the wreckage. Since the year A.D. 1000, skywatchers have seen five of our galaxy's stars die in brilliant explosions. Now a new distance determination to the most mysterious of these is yielding new insight into its nature.

What is a Wormhole?

 A wormhole is a theoretical passage through space-time that could create shortcuts for long journeys across the universe. Wormholes are predicted by the theory of general relativity. But be wary: wormholes bring with them the dangers of sudden collapse, high radiation and dangerous contact with exotic matter.

Wormhole theory

In 1935, physicists Albert Einstein and Nathan Rosen used the theory of general relativity to propose the existence of "bridges" through space-time. These paths, called Einstein-Rosen bridges or wormholes, connect two different points in space-time, theoretically creating a shortcut that could reduce travel time and distance.

Какое химическое оружие, возможно, было применено в Сирии?

В том, что в Сирии было применено химическое оружие, сомнений у экспертов уже практически не осталось. "Поначалу это были лишь подозрения, но то, что нам теперь довелось увидеть, может быть объяснено только использованием боевых отравляющих веществ", - считает токсиколог Ральф Трапп (Ralf Trapp), видный эксперт в области химического и биологического разоружения и многолетний консультант ряда международных организаций, включая ООН и Организацию по запрещению химического оружия (ОЗХО).

The Sacale of the Universe

Висячие сады «выселили» из Вавилона

Археолог Стефани Дэлли из Оксфордского университета представила свидетельства тому, что Висячие сады были построены на территории древней Ассирии. Об этом говорится в книге Дэлли «Тайна вавилонских Висячих садов» («The Mystery of the Hanging Garden of Babylon»), которая готовится к публикации. Обзор книги представляет The Guardian.

Результаты исследований Дэлли указывают на то, что одно из семи чудес света Древнего мира было построено в 7 веке до нашей эры в столице Ассирийского государства, Ниневии — в пятистах километрах от Вавилона. Сады, по мнению археолога, являлись частью дворцового комплекса, который соорудил царь Синахерриб.

The streets of 'Britain's Atlantis' seen for the first time in centuries: 3D scans reveal the 'drowned' medieval town of Dunwich

British researchers have revealed the street of a lost medieval town dubbed 'Britain's Atlantis', for the first time.

The team from the University of Southampton used advanced 3D scanning to reveal the port town of Dunwich.

Present day Dunwich is a village 14 miles south of Lowestoft in Suffolk, but it was once a thriving port – similar in size to 14th Century London until coastal erosion left it 10M underwater.

Digitizing history: 82,000-manuscript collection Vatican Library goes online

Project to open rare and valuable collection to the world is finally up and running.

Little things slow down the process of putting 40 million pages of ancient manuscripts in the Vatican Library online: gold or silver in the illuminations, bindings that disintegrate if you open them, getting the synergy right.

“It is important to realize if there is gold or silver in a manuscript. That requires a very particular process because the light will be different,” said Luciano Ammenti, who is in charge of IT at the Vatican and the project to digitize the storied library’s 82,000 manuscripts.