Where did Earth's water come from? This ancient asteroid family may help us find out

I don't think we know our water inventory. I think there is much more water in earth's crust than in the oceans. And that water is super-heated. Earth is saturated with water.
 
May 1, 2020
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I don't think we know our water inventory. I think there is much more water in earth's crust than in the oceans. And that water is super-heated. Earth is saturated with water.
I agree, but there may have been so many more asteroids in the past that are not today and are joined to the Earth.
 

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