Imagine swimming in the open ocean and suddenly coming face to face with a monster larger than any shark alive today. Faster than a speeding boat and armed with crushing jaws filled with razor sharp ...

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 ...