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Explosions in Space May Have Initiated Ancient Extinction on Earth.

04/08/2005 07:00AM

Explosions in Space May Have Initiated Ancient Extinction on Earth.

Scientists at NASA and the University of Kansas say that a mass extinction on Earth hundreds of millions of years ago could have been triggered by a star explosion called a gamma-ray burst. The scientists do not have direct evidence that such a burst activated the ancient extinction. The strength of their work is their atmospheric modeling -- essentially a "what if" scenario. <b>NOTE: French, German, Italian, and Spanish translations follow...</b>


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