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For years I've read the oceans were seeded by comets and meteorites through the eons of the earths formation. Now it looks as if that theory is outdated.

https://www.nbcnews.com/science/science-news/ancient-meteorites-suggest-earth-s-oceans-didn-t-come-space-n1238462
Edited by Morlock
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21 hours ago, Morlock said:

Morlock,

For decades it has been known that the deuterium heavy water ratio of comets and meteorites did not match Earth's oceans.  It seems clear that most of all water on Earth is primeval in spite of all of the TV hype.  Yes, comets and meteorites have contributed some, but more like just a few percent at best.

billpeters

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The first thing that comes to my mind when this subject comes up is that water is a product of combustion.

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19 hours ago, billpeters said:

Morlock,

For decades it has been known that the deuterium heavy water ratio of comets and meteorites did not match Earth's oceans.  It seems clear that most of all water on Earth is primeval in spite of all of the TV hype.  Yes, comets and meteorites have contributed some, but more like just a few percent at best.

billpeters

I guess I'm just not as up to date on this as I thought I was. 

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