Life reconstruction of the plesiosaur Polycotylus latippinus giving birth to a single, large young, based on fossil evidence from the Upper Cretaceous (80 million years ago) of Kansas.

Plesiosaurs were a diverse group of marine reptiles that thrived during the Mesozoic era, particularly in the Cretaceous period. They are characterized by their unique body shapes, which typically ...

An artist’s interpretation of a Jurassic plesiosaur. Fossils from a plesiosaur discovered in West Texas are the only fossils from a Jurassic vertebrate found and described in the state.

A “pellet” found in a plesiosaur fossil unearthed in Kagoshima Prefecture indicates the prehistoric creature regurgitated indigestible parts of its prey, much like modern birds and alligators ...

Among them was the fearsome plesiosaur, a marine reptile with a long neck and four large flippers that ruled the ancient seas ...

Experts spent 16 years working to extract and restore the 3.2m-long (10.5ft) plesiosaur skeleton. It has been nicknamed Raffle after Tracey Barclay's dog who first spotted the vertebrae in rocks ...

It was found near the site where a plesiosaur fossil was unearthed in 2004, the board of education announced on Aug. 26. A research team said the two fossilized species are some of the oldest in ...

The creature, a prehistoric plesiosaur, had a long neck, thick body, and four powerful fins which it used to propel itself through the water. The discovery is welcome news for researchers who had ...