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Science 27 February 2009:
Vol. 323. no. 5918, pp. 1175 - 1176
DOI: 10.1126/science.1170613
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Perspectives

ATMOSPHERIC SCIENCE:
Tipping Pointedly Colder

Lee R. Kump

Data from multiple ocean basins elucidate an ancient climate transition from greenhouse to icehouse.

Department of Geosciences and Earth and Environmental Systems Institute, Pennsylvania State University, University Park, PA 16802, USA. E-mail: lkump{at}psu.edu

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