A remarkable discovery in Morocco has shed light on a mysterious ancient marine predator, Carinodens acrodon, a small but ...

"Think Megalodon was terrifying? Meet 10 sea monsters even scarier than the prehistoric giant shark. Dive into the depths to uncover these fearsome creatures. See to Believe uncovers the forgotten ...

This story appears in the August 2010 issue of National Geographic magazine. Thirty-seven million years ago, in the waters of the prehistoric Tethys Ocean, a sinuous, 50-foot-long beast with ...

One hundred and fifty million years ago, dinosaurs ruled the land, but the oceans were dominated by a mysterious sea monster. Meet the pliosaur, the Tyrannosaurus rex of the seas! Now, a giant ...

Scientists discovered ancient marine reptiles that reached unprecedented trophic levels. These creatures exceeded today’s top predators.

Styxosaurus was an elasmosaur, a long-necked variety of the marine reptiles called plesiosaurs. These sea monsters grew upwards of 40 feet (12 meters) long. About half that length was neck, a ...

Palaeontologists say they are in a "race against time" to recover a huge prehistoric sea monster from eroding cliffs on the Jurassic Coast. The 2m-long (6ft) skull of a pliosaur, excavated from ...

A giant inflatable monster was put up at the entrance to Peterborough Cathedral on Friday to mark the new Monsters of the Sea exhibition A giant inflatable sea monster has taken over Peterborough ...