Scientists have discovered a new marine dinosaur species that grew 43ft and terrorised the seas over 80 million years ago. Tylosaurus rex – T-rex for short – was a massive mosasaur reptile that lived ...

Researchers have described a Japanese mosasaur the size of a great white shark that terrorized Pacific seas 72 million years ago. Extra-long rear flippers might have aided propulsion in concert with ...

Add Yahoo as a preferred source to see more of our stories on Google. A single tooth found among dinosaur bones in North Dakota reveals that some of the largest sea reptiles also ruled ancient rivers.

Four giant flippers, a long tail, and a dorsal fin help a recently classified mosasaur stand apart, warranting a grand title inspired by Japanese mythology. The mythical dragons of folklore that spew ...

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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 ...

For decades, mosasaurs have been understood as among the dominant predators of the Cretaceous seas — marine reptiles that could reach 11 meters in length and patrol the waters of the Western Interior ...

Researchers have described a Japanese mosasaur the size of a great white shark that terrorized Pacific seas 72 million years ago. Extra-long rear flippers might have aided propulsion in concert with ...

At the end of the Cretaceous Period, a type of giant reptile called mosasaurs occupied and dominated oceanic food webs. Mosasaurs had long bodies and were related to both snakes and monitor lizards.