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According to a recent theory, life started at the bottom of the sea, not above ground. |
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A new theory has been put forward, suggesting that life started not above ground but at the bottom of the sea. |
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If the new theory is correct, life started at the bottom of the sea, not on dry land. |
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The theory that life started at the bottom of the sea, not on land, has only recently been put forward. |
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The theory that life began, not on land, but at the bottom of the sea, has only recently been questioned. |