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Researchers find origin of 'breathable' atmosphere half a billion years ago
10-28-2007 · EurekAlert!Ohio State University geologists and their colleagues have uncovered evidence of when Earth may have first supported an oxygen-rich atmosphere similar to the one we breathe today. The study suggests that upheavals in the earth's crust initiated a kind of reverse-greenhouse effect 500 million years ago that cooled the world's oceans, spawned giant plankton blooms and sent a burst of oxygen into the atmosphere.
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Keywords: researchers, origin, breathable, atmosphere, half, researcher
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