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Low-down on a rhythmic high

Changes in the amount of solar energy reaching Earth account for certain climate cycles at high and low latitudes. Surprisingly, the effects of a high-latitude cycle evidently reached into the tropics.

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Figure 1: Global climate change from 5 million years ago to the present.


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Billups, K. Low-down on a rhythmic high. Nature 427, 686–687 (2004).

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