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News and Views
Nature 445, 607-608 (8 February 2007) | doi:10.1038/445607a; Published online 7 February 2007
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Palaeoclimate: When the world turned cold
Gabriel J. Bowen1
Abstract
As massive ice sheets grew on Antarctica during the first major glaciation of the Cenozoic era, the northern continents cooled and dried. The coincidence in timing implies that the cause was global rather than regional.
It has been nearly 34 million years since Earth was last free of large continental ice sheets. Before the beginning of the Oligocene epoch, 33.
- Gabriel J. Bowen is in the Department of Earth and Atmospheric Sciences, Purdue University, West Lafayette, Indiana 47907, USA.
Email: gjbowen@purdue.edu
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