Where Did Earth's Water Come From?
Description
When trying to figure out why our planet has water, scientists first had to theorize about how water formed in the universe.
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Catch new episodes of HOW THE UNIVERSE WORKS Tuesdays at 10/9c on Science! | http://science.discovery.com/tv-shows/how-the-universe-works/
Watch full episodes:
http://bit.ly/HTUWFullEpisodes
Subscribe to Science Channel:
http://www.youtube.com/subscription_center?add_user=sciencechannel
Check out SCI2 for infinitely awesome science videos. Every day.
http://bit.ly/SCI2YT
Download the TestTube app:
http://testu.be/1ndmmMq
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