The megalodon is a prehistoric ancestor of the modern-day shark, and just like it preceded the shark, National Megalodon Day precedes Shark Week. National Megalodon Day is June 15.

Researchers in the U.K. have revealed the true size of the megalodon, the prehistoric giant shark of Hollywood fame.

The North Carolina coast is known for many things but, for divers, it is well known as a hot spot for finding giant prehistoric Megalodon teeth.

Great whites have ruled shark movies for decades, but here comes the megalodon. "Meg 2: The Trench" spotlights an intimidating prehistoric predator.

Is it possible for the megalodon, a massive prehistoric shark, to return after 3 million years? For a few minutes, researchers with the Atlantic Shark Institute thought just that.

Millions of years ago, a shark that would dwarf even the largest of its modern relatives plied the waters of the earth. Called the megalodon, the creature could grow to almost 60 feet in length ...

The prehistoric shark megalodon became extinct more than 2 million years ago. Findings of a new study now suggest that a supernova may have led to the extinction of the marine behemoth.

This monstrous prehistoric shark was more than twice the size of a great white, and now a new detailed analysis has found just how big it really was.

A new study has found that the Megalodon shark was actually not like a gigantic great white shark. The prehistoric megatooth shark was a more slender shark than previous studies have suggested.

After witnessing students come up with widely variable estimates for megalodon size, Victor Perez reviewed the longstanding calculations. He eventually helmed a study modeling the extinct shark ...

The megalodon shark once ruled Earth's oceans. Now, a fossilized tooth from the extinct apex predator has been found by a man on a beach who was walking his dog.