January 11, 2013
Earth's Oldest Rock Has a Mighty Story to Tell
Robert Krulwich, NPR
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.
TAGGED: life, Earth, titanium, zircons