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New Estimation of Meteorite Impacts Tuesday, April 15, 2008 - Ehud Rattner Home >> Headlines >> Space   
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Scientists have developed a new way of determining the size and frequency of meteorites that have collided with Earth. Their work shows that the size of the meteorite that likely plummeted to Earth at the time of the Cretaceous-Tertiary (K-T) boundary 65 million years ago was four to six kilometers in diameter. The meteorite was the trigger, scientists believe, for the mass extinction of dinosaurs and other life forms. (source: nsf.gov)
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