An artistic rendering of a plesiosaur, an ancient marine predator that lived over 150 million years ago. (The Perot Museum of Nature and S) Although plesiosaurs evolved from land-dwelling animals ...

Discovery fuels Loch Ness Monster believers 03:35. The plesiosaur — an aquatic dinosaur once thought to exclusively reside in saltwater — is now believed to have spent much of its time in ...

The 183-million-year-old, 4.5-metre-long plesiosaur fossil, known as MH7, was first excavated from a quarry near Holzmaden, Germany, in 1940 but it was buried in a museum garden to protect it ...

plesiosaur(plee-SEE-uh-sawr)noun. Any marine reptile of the extinct genus Plesiosaurus, from the Jurassic and Cretaceous periods, having a small head, a long neck, four paddlelike limbs, and a ...

The discovery of a giant 100 million-year-old marine reptile’s skeleton in Australia has been hailed by researchers as a breakthrough that may provide vital clues about prehistoric life.

It is the oldest plesiosaur ever found. The fossil shows that, as predicted, plesiosaurs evolved in the late Triassic and survived the mass extinction that ushered in the Jurassic era 200 million ...

Mr. Marx and colleagues analyzed three soft-tissue skin samples, each about the size of a fingernail, from a flipper and the tail of a 183 million-year-old long-necked plesiosaur specimen.

The bones of a baby plesiosaur have been recovered from an Antarctic island, scientists reported Monday. In life, 70 million years ago, the five-foot-long animal would have resembled Nessie, the ...

The plesiosaur is long extinct, but thanks to a biomechanical engineer, it has been reincarnated — as a robot. This new so-called “robosaur” reveals the secret behind the animal’s odd but ...