The origin of Earth’s water

The early solar system was hot and violent–not the kind of place you’d expect water to hang around. But new measurements of lava from Baffin Island, which may contain samples of deep mantle material, suggest that somehow it did. The findings contradict the conventional view that Earth formed dry and got its water later, from asteroids or comets. Learn more in my story for Science.

Sixty million years ago, the mantle plume that now feeds eruptions in Iceland (like Holuhraun, above) brought deep mantle material to the surface, which contains clues about the origin of Earth's water. (Credit:  whereiskelso via Flickr)
Sixty million years ago, the mantle plume that now feeds eruptions in Iceland (like Holuhraun, above) brought deep mantle material to the surface, which contains clues about the origin of Earth’s water. (Credit:
whereiskelso via Flickr)
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One thought on “The origin of Earth’s water

  1. I always found it hard to imagine enough water traveling to Earth via asteroid strikes! It’s one of those bits of information that involves such a large number of events happening that it’s hard to wrap my mind around. It’s interesting to see a new theory emerging, when that one has dominated for so long. Your article was great to read, very interesting and well written.

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