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Roaming the ancient seas eons ago, the megalodon shark eviscerated its prey with jaws that were 10 feet wide. Warpaintcobra/iStock via Getty Images Plus Imagine traveling back in time and observing ...

The megalodon went extinct 3.6 million years ago, and is thought to be the largest shark that ever swam the Earth. But the megalodon may not have been as big as once thought, some researchers suggest.

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to [email protected]. When did the megalodon shark go extinct, and why ...