Name: Watch Mass Extinction: Life at the Brink
Uploaded: 2014-11-30
Duration: 46 min
Description: 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 thes

Mass Extinction: Life at the Brink

Watch Mass Extinction: Life at the Brink | Where To Watch