History is full of terrifying beasts that would make even the most ferocious living predators look like cuddly toys. There's the largest prehistoric arthropod, as well as the the giant eagle that ...

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 ...

LAS VEGAS - SEPTEMBER 30: One of the world's largest set of shark jaws comprised of about 180 fossil teeth from the prehistoric species, Carcharocles megalodon, which grew to the size of a school bus, ...

Add Yahoo as a preferred source to see more of our stories on Google. Roaming the ancient seas eons ago, the megalodon shark eviscerated its prey with jaws that were 10 feet wide. Warpaintcobra/iStock ...

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 ...

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 ...

Fossils have a way of captivating everyone, no matter their profession or the species unearthed, but there’s something about Megalodon that grips the imagination like no other. Fossilized shark teeth ...

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

Imagine the seas off Peru, 6 million years ago. A group of long-nosed dolphins swam through the warm seawater, breaking the surface with occasional enthusiastic leaps into the stark sunshine, then ...

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 ...