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Science 22 November 1996:
Vol. 274. no. 5291, pp. 1303 - 1304
DOI: 10.1126/science.274.5291.1303
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Research News

Richard A. Kerr

Everyone has heard that an asteroid or comet slammed into Earth 65 million years ago, but did this impact really kill off thousands of species, including the dinosaurs? For many species, the record suggests gradual, not catastrophic, extinction, so paleontologists have been skeptical. But on page 1360, researchers using statistical analyses of the fossil record suggest that at least one type of sea creature, the ammonites, was indeed snuffed out quickly at the time of the impact.

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Impacts and marine invertebrate extinctions.
N. MacLeod (1998)
Geological Society, London, Special Publications 140, 217-246
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Science. ISSN 0036-8075 (print), 1095-9203 (online)