Earth's Urinary Water Must Have Come From the Sun

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Scientists have found that some of Earth's water might have come from the sun. The sun is constantly shooting out solar wind, and rocky bodies in our solar system are mostly made up of silicon and oxygen. Some of this water must have come from somewhere else. But it's suggested that Earth has at least some of its hydrogen and water directly from the Sun.

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.

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