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Snowball Earth melting and freezing

Mouse over the preview image and click the play icon to see a flash version of the animations. Download high-resolution animations using links below.

Snowball Earth Melting - Some 600 million years ago geologists believe that the surface of Earth may have been completely encased in ice, a condition referred to as the "Snowball Earth." This is animation represents a "Snowball Earth" melting to its present climate. Present day elevation data as well as continental distribution are used.

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Snowball Earth Freezing - Similar to the animation on the left but with Earth freezing over rather than melting.

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Animations produced by PSI scientist Steve Kortenkamp.

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