Millions of years ago, the megalodon shark was one of the scariest creatures to ever lurk in our seas. And even before that, the mosasaurs reigned supreme, terrorizing every ocean creature in sight.

The curious minds at What If imagine an epic battle between a Megalodon shark and a massive Mosasaurus, exploring which prehistoric predator would dominate the oceans.

Maximilian Scott, a volunteer at The Academy of Natural Sciences of Drexel University and recent Masters degree graduate from the University of Manitoba, will discuss “The social ecology of mosasaurs ...