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Science 7 September 2007:
Vol. 317. no. 5843, p. 1310
DOI: 10.1126/science.317.5843.1310
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News of the Week

IMPACT CRATERING:
A Big Splat in the Asteroid Belt Doomed Earth's Dinosaurs

Richard A. Kerr

A chance encounter between two huge chunks of rock in the asteroid belt reached out across 100 million years and 200 million kilometers to snuff out 90% of Earth's marine species, as well as the dinosaurs, 65 million years ago, according to a new analysis.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)