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 ...

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 ...

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 ...

Megalodons were the biggest sharks on the planet. Recent studies show how these apex predators reached lengths of 50 feet with heads the size of cars.

Researchers have dated vertebrae from a massive prehistoric shark thought to have ruled the waves off northern Australia back ...

The biggest, most formidable shark to have ever roamed the ocean may have been even larger than previously thought, according to a new study. The research, published Sunday in the journal ...

The ocean depths are full of mysteries and monsters. But some of its greatest secrets and behemoths lie not beneath the waves ...

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 ...

Otodus megalodon, the biggest shark of all time, has long captured the imaginations of paleontologists and the public alike. Scientific fascination spawns from the sheer enormity of their fossilized ...

Just how big was a megalodon? There is much disagreement within the scientific community regarding the most famous extinct ...

The Discovery Channel has been in deep chum all week over opening their annual Shark Week with a special called Megalodon: The Monster Shark Lives. Those looking to tune in to see an exploration of ...

A new study proposes that the massive ancient shark was built more slenderly than a great white. But not all paleontologists agree. This illustration of megalodon may be wrong. The ancient predatory ...