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1 Planet Earth is a living planet. Even solid rock, unmoving as it seems, has an exciting life of its own. But rocks live in geologic time. Their lives span billions of years. We humans can barely glimpse the living Ear
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Document Date: 2015-06-19 13:21:29
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1 Planet Earth is a living planet. Even solid rock, unmoving as it seems, has an exciting life of its own. But rocks live in geologic time. Their lives span billions of years. We humans can barely glimpse the living Ear