It's Okay to Be Smart

The Cosmic Origins of Earth's Water

Season 5 Episode 24 | 4m 14s

Why is Earth is a blue planet? Because it’s covered in water! Where did Earth’s water come from? Of course, water isn’t unique to our planet. The origin of water traces beyond the solar system to the earliest days of the universe. Here’s the story of the galaxy’s H2O.

Aired: 07/24/18

Rating: NR

Video has closed captioning.

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