Imagine swimming in the ocean and suddenly spotting a creature larger than any shark, faster than any human can sprint, and more vicious than any predator alive today. Meet the Mosasaurus, a marine ...

A Feb. 21 Facebook video (direct link, archive link) claims to show footage of a Mosasaurus, a water-dwelling reptile that lived millions of years ago. "Extinct Animals Caught On Camera," reads the on ...

Mosasaurus was among the largest and last of the sea-dwelling mosasaurs. Dmitri Bogdanov via Wikimedia Commons under CC0 There hardly was a more fearsome family of seagoing carnivores than the ...