Asteroids: Spark of Life? | Full Documentary | NOVA | PBS

What if violent asteroid impacts actually jump-started life on Earth? Explore a dramatic theory. Imagine a time when Earth was a molten, volcanic wasteland, heavily bombarded by colossal asteroids. We've long feared these cosmic impacts as destroyers of life, but what if they were the key to our very existence? Explore a revolutionary theory suggesting that these violent collisions provided the essential ingredients - water, minerals, and energy - needed for life to ignite on our planet.

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