Giant mosasaurs, once thought to be strictly ocean-dwelling predators, may have spent their final chapter prowling freshwater ...

Mosasaurs are commonly considered marine reptiles, so finding their remains in a river environment prompted a clear question: ...

Mosasaurs, giant marine reptiles that existed more than 66 million years ago, lived not only in the sea but also in rivers.

Learn how chemical clues reveal a mosasaur was hunting in freshwater rivers as the Cretaceous seaway receded.

Scientists from several countries have determined that mosasaurs, Cretaceous-era marine reptiles, once thrived in freshwater ...

Two individuals of Traskasaura sandrae hunt the ammonite Pachydiscus in the northern Pacific during the Late Cretaceous. Traskasaura sandrae, named in the Journal of Systematic Paleontology, was ...

Scientists have discovered the fossils of a new prehistoric species in Morocco — a bizarre-looking marine lizard considerably larger than a great white shark, which, they say, dominated the seas while ...

A gigantic 8 m long mega-predatory shark stalks an unwary long-necked plesiosaur in the seas off Australia 115 million years ago. Around 115 million years ago, the seas off northern Australia were ...

Scientists have unearthed the remains of a gigantic, 200 million-year-old sea monster that may be the largest marine reptile ever discovered. The newfound creature is a member of a group called ...

Rocks have been found to hold many traces of Earth's ancient history, but usually geologists have to seek them out. Every once in a while, however, these imprints of times past are found by ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. Extinct species are every bit as interesting as those that ...