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May 20 2013

Cracking the ice code


What happened the last time a vegetated Earth shifted from an extremely cold climate to desert-like conditions? And what does it tell us about climate change today?

John Isbell is on a quest to coax that information from the geology of the southernmost portions of the Earth. It won't be easy, because the last transition from "icehouse to greenhouse" occurred between 335 and 290 million years ago.

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