A 2-billion-year-old chunk of sea salt provides new evidence for the transformation of Earth's atmosphere into an oxygenated environment capable of supporting life as we know it.
Earth Sciences
Mar 22, 2018
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378
The massive Kaskawulsh Glacier in northern Canada has retreated about a mile up its valley over the past century.
Environment
Apr 17, 2017
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252
Several Palaeozoic mass extinction events during the Ordovician and Silurian periods (ca. 485 to 420 to million years ago) shaped the evolution of life on our planet. Although some of these short-lived, periodic events were ...
Earth Sciences
Aug 25, 2015
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53
(Phys.org)—The Permian geologic period that ended the Paleozoic era climaxed around 252 million years ago with a sweeping global mass extinction event in which 90 to 95 percent of marine life became extinct. It would take ...
Astrobiologists supported by the NASA Astrobiology Institute have assessed the effects of impacts on the crust of the early Earth. The research could help determine whether or not evidence of such violent events in our planet's ...
Space Exploration
Feb 24, 2014
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0
Scientists have, for the first time, demonstrated that climate models are able to simulate past abrupt changes in the Earth's climate – giving more confidence in predictions of future global climate change.
Earth Sciences
Nov 29, 2013
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0
A huge asteroid that wiped out the dinosaurs may not have been the only cosmic event to cause mass extinctions or change Earth's climate. Tiny minerals leftover from many smaller meteorites could provide the geological evidence ...
Space Exploration
Sep 12, 2013
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0
(Phys.org) —They were strange bedfellows in a 250 million-year-old burrow: the sleeping, cat-size mammal forerunner Thrinaxodon liorhinus and the slightly smaller amphibian Broomistega putterilli that crawled in after, ...
Archaeology
Jul 17, 2013
4
0
(Phys.org) —The dramatic geological events that created opal, Australia's national gemstone, have been described for the first time by a University of Sydney researcher.
Earth Sciences
May 31, 2013
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0
(Phys.org) —Titanic forces in the Earth's crust explain why the abundance and richness of corals varies dramatically across the vast expanse of the Indian and Pacific Oceans, a world-first study from the ARC Centre of Excellence ...
Plants & Animals
May 22, 2013
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