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When Earth Was Bombarded by Asteroids

Season 53 Episode 1 | 3m 41s

Four and a half billion years ago, Earth was battered by relentless asteroid impacts powerful enough to vaporize oceans and melt its crust. Despite the chaos, life emerged anyway.

National Corporate funding for NOVA is provided by Carlisle Companies. Major funding for NOVA is provided by the NOVA Science Trust and PBS viewers.
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