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Catastrophe: Season 1, Episode 2

Snowball Earth (Dec 1, 2008)

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Inspired by ideas about nuclear war, a theory that the Earth was encased in ice 650 million years ago has gained popularity in the science community. This program explains how this condition came about, how it ended, the impact on the evolution of animal life and presents the evidence for these conclusions. Written By David Foss  Less

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