Bone worms (the red animals in this picture) were first discovered in the early 2000s, but these animals are believed to have evolved more than 100 million years ago. Adapted from Fujiwara et al. via ...

Sixty six million years ago, sea monsters really existed. They were mosasaurs, huge marine lizards that lived at the same time as the last dinosaurs. Growing up to 12 metres long, mosasaurs looked ...

Researchers have discovered a huge new mosasaur from Morocco, named Thalassotitan atrox, which filled the apex predator niche. With massive jaws and teeth like those of killer whales, Thalassotitan ...

A sea monster with teeth so sharp they formed a "saw-like blade," swam in the waters of what is now Morocco about 66 million years ago, a new study finds. Miners discovered the remains of this ...

Fossils of a giant killer mosasaur have been discovered, along with the fossilized remains of its prey. At the end of the Cretaceous period, 66 million years ago, sea monsters really existed. While ...