January 11, 2013

Earth's Oldest Rock Has a Mighty Story to Tell

Robert Krulwich, NPR


AP Photo

It's hard to imagine how this teeny little rock — it's not even a whole rock, it's just a grain, a miniscule droplet of mineral barely the thickness of a human hair — could rewrite the history of our planet. But that's what seems to be happening.

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TAGGED: life, Earth, titanium, zircons

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