A fossil found in southwest Germany in 1978 has been deemed to represent a new species of marine reptile known as a plesiosaur.

Paleontologists in Germany have described a never-before-seen species of Jurassic marine reptile from 183 million years ago.

In novels like “Moby Dick” or “20,000 Leagues Under the Sea,” monsters exist to aggravate and impinge on human life. Science, folklore, and fiction have villainized deep sea creatures for ...

Sixty six million years ago, sea monsters really existed. They were mosasaurs, huge marine lizards that lived at the same time as the last dinosaurs. Growing up to 12 meters long, mosasaurs looked ...

A gigantic sea monster from the era of the dinosaurs has been discovered and named after a Norse snake. The 24-foot-long creature is a new species of mosasaur—aquatic, carnivorous lizards that ...

Eighty-seven years after an elaborate hoax on the island of Nantucket, islanders recreated the event. A giant sea monster appeared on the island Monday.