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.

This video explores how Mosasaurus evolved into a marine predator so dominant that it effectively “broke the game” of prehistoric ocean life. Scientists highlight the creature’s immense size, ...

Breakthroughs, discoveries, and DIY tips sent six days a week. Terms of Service and Privacy Policy. Nearly 70 million years ago, mosasaurs were the stuff of ...