A huge meteorite hit Australia 2 billion years ago. Did it lead to life as we know it? | liammannix
But it’s a very unusual lump. On one edge, the granite has formed columns, a typical sign of cooling rock. Cut into it and you’ll find the granite riddled with long spidery lines like a shattered car windscreen.
Inside each crystal is a tiny amount of uranium. Uranium decays into lead at a constant pace. Know how much uranium and lead a rock has and you know its precise age. There are several theories why, including volcanoes belching carbon dioxide into the atmosphere and warming the planet.
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