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  Nature: New evidence of asteroid impact killing the dinosaurs
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11th Feb 2013, 7:30 AM
The old theory about a huge asteroid wiping out the whole dinosaur population, just got new support, according to researchers. The only survivors of the mass extinction are suppose to be the birds. The most reasonable explanation so far is the impact from an asteroid or comet, that hit the Earth near the town of Chicxulub in Mexico.

The impact created a so called gargantuan crater measuring more than 110 miles (180 km) in width. The explosion of such large object (6 miles, 10 km across), would equal the released energy of 100 trillion tons of TNT or more than a billion times more than the bombs that destroyed Hiroshima and Nagasaki in Japan at the end of the World War 2.

The newest findings suggest that the Chicxulub impact and the extinction of dinosaurs (Cretaceous-Tertiary extinction event also known as K-T) happened no more than 33,000 years apart. Researchers used high-precision radiometric dating analysis of the debris that was brought to the surface by the massive impact. The fact the impact and mass extinction may have been virtually simultaneous in a bigger scale of time supports the idea that the meteor or android impact indeed was the reason that dinosaurs no longer roam our lands.

More here: http://www.livescience.com/26933-chicxul....

changed: mat (11th Feb 2013, 3:58 PM)
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