News of the WeekGeochemistry

Gasping for Air in Permian Hard Times

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Science  15 Apr 2005:
Vol. 308, Issue 5720, pp. 337
DOI: 10.1126/science.308.5720.337a

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On page 398, researchers hypothesize that low atmospheric oxygen late in the Permian period squeezed land animals into smaller, more fragmented areas at low altitudes, inducing extinctions while driving down diversity.