Mega-Disasters-Gamma-Ray-Bursts

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Scientists at the University of Kansas believe gamma ray bursts were responsible for a great mass extinction on Earth 450 million years ago. The gamma rays strip away the ozone layer and generate chemical smog, producing a widespread chill that grips the Earth. More

2014-03-18

Added Mar 18, 2014  

Channel Science & Technology

Duration 44:56   |   views 5442


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