Mass Extinction: Life at the Brink
It's death on an unimaginable scale, when a majority of Earth's species quickly die out. It's called "mass extinction," and it's happened at least five times before. Cataclysms, such as supervolcanoes or asteroids, are thought to cause these events, but some experts believe a manmade mass extinction could be next. Is o...
Top Cast
Elizabeth Hadly
Self
Jeffrey Wright
Narrator (voice)
Kirk Johnson
Self
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