Concepts | Published:

The key to the past?

Nature volume 409, page 289 (18 January 2001) | Download Citation


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  1. 1.

    FURTHER READING The Two-Mile Time Machine: Ice Cores, Abrupt Climate Change, and Our Future (Princeton Univ. Press, 2000).

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  1. Richard B. Alley is in the Environment Institute and Department of Geosciences, Pennsylvania State University, 204A Deike Building, University Park, Pennsylvania 16802, USA.

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