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A comment on A fifth of Earth’s geologic history might have vanished because of glaciers. Parent comment

Re:A fifth of Earth’s geologic history might have vanished b... by sgt101 on Tuesday January 01, 2019 @03:12PM (#18802009)
Billions for sure - we know because the natural reactor at Oklo 1.7 billion years ago is still very much detected.

https://en.wikipedia.org/wiki/Natural_nuclear_fission_reacto...

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Re:A fifth of Earth’s geologic history might have vanished b... by Ericson2314 on Tuesday January 01, 2019 @09:11PM (#18803723)
Very cool. Glad to learn about that!
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