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Science 23 June 2000:
Vol. 288. no. 5474, pp. 2143 - 2144
DOI: 10.1126/science.288.5474.2143
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Perspectives

PALEOCLIMATE:
A Causality Problem for Milankovitch

Daniel B. Karner and Richard A. Muller

According to the Milankovitch theory, changes in the incident solar radiation, called insolation, in the Northern Hemisphere provide the driving force for global glacial cycles. In their Perspective, Karner and Muller discuss recent studies of corals from around the world that shed doubt on the applicability of the theory to the termination of the penultimate glaciation. The authors argue that a fresh, unbiased look at the data is warranted.

The authors are at the Department of Physics, University of California, Berkeley, CA 94720, USA. E-mail: dkarner{at}socrates.berkeley.edu; ramuller{at}lbl.gov

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