Fifteen million years ago, now-extinct species of dolphins, whales and large sea cows roamed the world’s oceans, topping the underwater food chain. Yet back then, any one of these creatures could ...

The ocean’s ultimate predator once hunted whales with ease. Here’s why the world’s biggest shark eventually vanished off the ...

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 Meg was shaped more like a whale than the giant great white shark in the Jason Statham movies, suggests new research. Megalodon, the prehistoric ocean hunter, was a "longer, sleeker super predator ...

A shark so rare it was once thought to be extinct was just spotted off the Welsh coast. The Wildlife Trust of Wales captured footage of the angel shark in Cardigan Bay, the first documented sighting ...

Shark biologists now say a lemon shark, like this one, is a better model of the extinct megalodon's body than the great white shark. The megalodon has long been imagined as an enormous great white ...

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The megalodon tooth 7-year-old Foster Frazier found back in June. The tooth is estimated to be over 5 inches long. Photo provided by Tina Frazier. While finding shark teeth on the beach isn’t uncommon ...

Would you ever venture into the ocean if you knew this creature could be lurking beneath you? It's twice the size of a T. rex ...