News & AnalysisPaleoclimatology

How to Make a Great Ice Age, Again and Again and Again

Science  09 Aug 2013:
Vol. 341, Issue 6146, pp. 599
DOI: 10.1126/science.341.6146.599

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Summary

For more than 30 years, climate researchers have been trying to figure out how slight changes in Earth's orbit could drive the great ice ages. Now the best computer model of the ice ages yet may have found the answer: a rhythmic stretching of Earths egg-shaped orbit around the sun every 100,000 years amplifies the influence of a second orbital cycle.