Origins: How did Earth get its water?

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Life as we know it needs water, but scientists can’t figure out where Earth’s water came from. Answering that question is just one piece of an even bigger mystery: “Why are we here?”
This is the first episode in our new three-part series, Origins, about the beginnings and boundaries of life on Earth.
For more, go to http://vox.com/unexplainable
It’s a great place to view show transcripts and read more about the topics on our show.
Also, email us! unexplainable@vox.com We read every email.
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Origins: How did Earth get its water?

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Origins: How did Earth get its water?
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