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

Some 66 million years ago, a city bus-sized terrifying predator prowled a prehistoric river in what is now North Dakota. This ...

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

Giant anacondas grew large early and kept that size for millions of years, surviving climate shifts and habitat changes ...

Wildfires rage, yet many snakes slither on. Here’s how ancient survival tricks may be helping reptiles outlast climate-driven ...

Fossil reveals that a giant Jurassic ichthyosaur, Fossilized fin from a Temnodontosaurus, hunted using extreme stealth 183 million years ago.

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 ...