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Science 21 January 2005:
Vol. 307. no. 5708, p. 335
DOI: 10.1126/science.307.5708.335a
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News of the Week

PALEONTOLOGY:
Fossil Count Suggests Biggest Die-Off Wasn't Due to a Smashup

Richard A. Kerr

According to the latest fossil evidence, published online this week by Science (www.sciencemag.org/cgi/content/abstract/1107068), the Permian-Triassic extinction resulted from a protracted crisis rather than an impact.

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