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Science 27 February 1998:
Vol. 279. no. 5355, pp. 1304 - 1305
DOI: 10.1126/science.279.5355.1304
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CLIMATE:
Sea Floor Records Reveal Interglacial Climate Cycles

Richard A. Kerr

Researchers studying deep deposits of muck on the sea floor have now read a detailed history of climate that extends nearly 2 million years into the past and covers multiple interglacial periods. As one group reports in this issue of Science (p. 1335), the record shows that global climate varies on regular cycles lasting from 1200 to 6000 years, in glacial and interglacial periods alike. It's a finding that offers a mixed message of reassurance and warning about the future of our own climate as greenhouse gases warm the world.

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