Researchers believe unusual fossils recovered during offshore drilling may be ancient vomit from Jurassic marine reptiles.

The behavior resembles that of modern fur seals and marine crocodiles, according to a study published by Cambridge University Press ...

The plesiosaur — an aquatic dinosaur once thought to exclusively reside in saltwater — is now believed to have spent much of its time in freshwater, according to a new study. The discovery is likely ...

Among the stranger creatures to roam the earth during the time of the dinosaurs was not a dinosaur at all, but a marine reptile — the plesiosaur. This odd predator navigated Mesozoic Era waters with ...

The mix of features offers new clues to how plesiosaurs navigated prehistoric oceans. The tip of a right flipper of the new plesiosaur fossil, with two scales along the trailing edge. A new study ...

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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 powerful ...

Fossil of a pregnant Plesiosaur, a giant, carnivorous four-flippered reptile that roamed the world's oceans in the Mesozoic Era, together with that of a fetus nearly intact, have been discovered by ...