The ancient species of shark known as the megalodon (Carcharocles megalodon) was the biggest to have ever lived. Despite disappearing from Earth's oceans millions of years ago, this fearsome predator ...

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 ...

Gigantic extinct sharks have something to tell us from millions of years ago, and paleontologists are only just beginning to unravel that message. In a series of firsts, paleontologists have ...

Imagine heading out for a swim and knowing that a shark the size of a bus could be lurking somewhere beneath the surface. This is not the plot of a science fiction movie. It is what life might be like ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Paleobiologist Dr ...

Faster than any shark alive today and big enough to eat an orca in just five bites: A new study suggests the extinct shark known as a megalodon was an even more impressive superpredator than ...

Picture a fin the size of a surfboard sliding past your boat. Fun to imagine, sure. But when you set daydreams beside the evidence, a clear answer surfaces. The giant shark we call megalodon ruled ...