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How Earth became a giant snowball 700 million years ago

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Harvard scientists say they might finally have the answer to what caused the

Around 717 million years ago, the Earth froze over. The Sturtian glaciation, as this event is known, was no ordinary Ice Age but one so extreme that it caused the Earth to become a giant snowball for at least five million years. How it happened has been a mystery for the ages – till now. In a new study, Harvard scientists suggest that the answer might lie in the way volcanic eruptions caused the Earth's temperatures to plummet.

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Category: Environment

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