Majority Of Earth's Water Likely Not From Comets
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It was once thought comets may have delivered the water on Earth, but the chemical signature of comet water does not match that of the water found on Earth. If not from comets, how did Earth get its water?
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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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