In a geological moment about 66 million years ago, something killed off almost all the dinosaurs and some 70 percent of all other species living on Earth. Only those dinosaurs related to birds appear to have survived. Most ...
Earth Sciences
Apr 4, 2013
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About 66 million years ago a mountain-sized asteroid hit what is now the Yucatan in Mexico at exactly the time of the Cretaceous-Paleogene (K-Pg) mass extinction. Evidence for the asteroid impact comes from sediments in the ...
Earth Sciences
Mar 26, 2013
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(Phys.org) —It's has been know that massive increases in emission of CO2 from volcanoes, associated with the opening of the Atlantic Ocean in the end-Triassic Period, set off a shift in state of the climate which caused ...
Earth Sciences
Mar 22, 2013
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(Phys.org) —A fireball that appeared over the Sri Lankan province of Polonnaruwa on December 29, 2012 was a meteorite containing algae fossils, according to a paper published in the Journal of Cosmology. A team of researchers, ...
(Phys.org)—Even comparatively small meteorite impact craters may have played a key role in the origin and evolution of early life on Earth, according to a researcher at The University of Western Australia.
Space Exploration
Feb 26, 2013
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Planetary Defense is a concept very few people heard of or took seriously – that is until last week's humongous and totally unexpected meteor explosion over Russia sent millions of frightened residents ducking for cover, ...
Space Exploration
Feb 25, 2013
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The first firm details of the 15 February asteroid impact in Russia, the largest in more than a century, are becoming clear. ESA is carefully assessing the information as crucial input for developing the Agency's asteroid-hunting ...
Space Exploration
Feb 19, 2013
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An asteroid measuring up to 20km across hit South Australia up to 360 million years ago and left behind the one of the largest asteroid impact zones on Earth, according to new research published today.
Space Exploration
Feb 15, 2013
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(Phys.org)—The asteroid Vesta, which exists between Mars and Jupiter, is one of the largest in the solar system—it is also considered to be a protoplanet because it has a core, mantel and crust. Now, a research team made ...
While many assume that a comet or asteroid impact killed off the dinosaurs, the actual dates of the impact and extinction are imprecise enough that some have questioned the connection. UC Berkeley and Berkeley Geochronology ...
Earth Sciences
Feb 7, 2013
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