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A blinding streak of light screaming across the Russian sky, followed by a shuddering...
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Some 250 million years ago, some of the largest, most dangerous reptiles ruled this land.

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Fossils reveal how life’s explosion in the ocean was recreated on dry land.
NOVA  ·  Episode 4012

Australia's First 4 Billion Years: Strange Creatures


After a massive extinction, diverse marsupials came to dominate this isolated continent.

Airing August 8, 2014 at 9 pm on PBS

Original Air Date: 5/1/13

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