RE: HOW WE KNOW THAT THE EARTH IS CLOSE TO 4.5 BILLION YEARS OLD.

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HOW WE KNOW THAT THE EARTH IS CLOSE TO 4.5 BILLION YEARS OLD.

in steemstem •  7 years ago 

Leaving comments asking for votes, follows, or other self promotional messages could be seen as spam.

Your Reputation Could be a Tasty Snack with the Wrong Comment!

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