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Fearsome Sharks of Today Evolved When Ancient Oceans Got Hot

July 08, 2024

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More than 100 million years ago, scientists say, warming seas and reduced oxygen may have sent some sharks higher into the water column, where they evolved to be fierce and hungry.

Jeanne Timmons | NYTimes Science | Disclosure

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Fearsome Sharks of Today Evolved When Ancient Oceans Got Hot

More than 100 million years ago, scientists say, warming seas and reduced oxygen may have sent some sharks higher into the water column, where they evolved to be fierce and hungry.

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