How the Universe Works S3E6: Weapons of Mass Extinction
- Aired: 2014-08-13
- Time: 22:00:00
- Runtime: 60 minutes
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Overview
Asteroids strike, planets collide, black holes blast out death rays, volcanoes erupt, and ice engulfs the planet. These are the universe's weapons of extinction. They've happened before, wiping out entire species, and they will happen again.