Mosasaurs are marine reptiles akin to lizards and snakes rather than dinosaurs. They are believed to have appeared about 98 million years ago and to have swum by moving their tail fins from side ...

Mosasaurs were not dinosaurs. Instead, they are more closely related to snakes and large lizards like the Komodo Dragon.

In real life, many of the dinosaurs vary in size and are often covered in feathers, but a few of them actually don't look that different. The Mosasaurus is really "marine lizard that's more ...