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 ...

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

The length of this humongous shark was a whopping 16 metres and possibly as much as 20 metres. It has been recreated in the video above using the most up-to-date modern science. That's way bigger ...

The ocean’s most formidable cold-hearted killer, the long-extinct giant megalodon shark, may have been warm-blooded – which could have caused its disappearance more than three million years ago.

If you picture a megalodon, chances are you envision what amounts to a gigantic great white shark. The image is understandable, given almost every depiction of the ancient apex predators across ...

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

Releasing a goldfish into the wild can create "an invasive problem that can last decades," the U.S. Fish and Wildlife Service said Brenton Blanchet is a writer-reporter at PEOPLE. He has been ...

A massive "megalodon" of a goldfish caught in Presque Isle, Pennsylvania, is a good reminder of why people shouldn't release their pets into the wild, the U.S. Fish and Wildlife Service says.

Something fishy is going on. A pet store goldfish went from “cute to brute” after it was found in a Pennsylvania waterway – with experts now warning against dumping unwanted fish into ponds ...

Few prehistoric monsters capture the imagination quite like the megalodon. From natural history museums to the silver screen, this colossal shark, which went extinct over three million years ago ...