Mosasaurs were the apex predators of the oceans during the reign of the dinosaurs, but new research reveals dinosaurs weren't ...

A rare fossil has provided a snapshot of what was an exceptionally unlucky day for a prehistoric sea cow. The now-extinct species of dugong, a manatee-like marine mammal, was swimming in the sea about ...

The remarkably well-preserved skull of a gigantic pliosaur, a prehistoric sea monster, has been discovered on a beach in the county of Dorset in southern England, and it could reveal secrets about ...

Looking out over the Eromanga Sea 100 million years ago, not every ferocious predator would be found under the surface of the water. Instead, one threat would come from the skies. The “long-vanished” ...

Pleurocystitid was a marine organism that existed almost 450 million years ago, long before the first dinosaurs. Scientists have now built a soft-bodied robotic replica of it, which could inspire new ...

The Paleozoic era began 530 million years ago when the Earth woke up from an ice age. This era lasted for 289 million years, ...

Paleontologists in Spain believe they unearthed a new prehistoric sea turtle species that may be among the largest ever, according to research published last week in the peer-reviewed journal ...

In the oceans of earth millions of years ago, danger was never far away and monsters lurked in every shadow. Experience this astounding world by playing as six different prehistoric marine reptiles, ...

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