The skull of the ancient dolphin Nihohae matakoi, which had jutting out teeth at the end of its snout, on a black background A bizarre predatory dolphin that lived 25 million years ago and had long, ...

Surprisingly, that honour goes to a tiny, almost eel-like creature that lived long before either of those beasts, known as ...

Have you ever wondered if slugs can smile — or if they even have teeth? Their smooth bodies and simple appearance might ...

Ichthyosaurs were the main predators of the oceans millions of years ago. Like reptilian dolphins with a mean streak, they grew between 10 and 43 feet long and had a long snout armed with viciously ...

Given their huge size, there is no question as to why hippopotamuses are one of the most feared mammals. Apart from their bulky appearance, they also have an odd-looking mouth that features huge, ...