What the naturalists did not realize was that Plesiosaurus was not an intermediate form between crocodiles and ichthyosaurs, after all, but a unique and starkly different sort of marine reptile.

A search in the average basement will probably yield old records, a bicycle with deflated tires, maybe even a photo album. But these timeworn mementos generally don’t date back 78 million years, ...

In the dark seas of the ancient world, few creatures were as interesting as the plesiosaur: a long-necked marine reptile with four large flippers. These fearsome predators dominated the oceans in the ...

Plesiosaurs are a group of extinct marine reptiles that lived in the oceans while the dinosaurs lived on land. Find out what plesiosaur fossils have revealed about these animals and how big they could ...

The inflexibility of the plesiosaur neck makes these creatures all the more puzzling. If they were incapable of raising their heads above the water to ambush prey from above and lacked the flexibility ...