Dr. Scott explains the differences between prehistoric sharks and sharks today.

The megalodon is a prehistoric ancestor of the modern-day shark, and just like it preceded the shark, National Megalodon Day precedes Shark Week. National Megalodon Day is June 15. The Discovery ...

Australian teacher finds massive prehistoric shark teeth twice the size of a Great White's The 3-inch long teeth are on display at the Melbourne Museum.

The true size of a gigantic prehistoric megalodon shark that ruled the oceans millions of years ago has been revealed for the first time -- and it had teeth as big as hands, and a fin as tall as a ...

The megalodon is a prehistoric ancestor of the modern-day shark, and just like it preceded the shark, National Megalodon Day precedes Shark Week. National Megalodon Day is June 15. The Discovery ...

Five years ago, “The Meg” met expectations as a fairly entertaining time-squanderer about huge, prehistoric sharks. The trailers for the sequel (new director, more creatures) feature the sight ...

In this episode of Valley 101, producer Kaely Monahan dives both through time and into salt waters to discover the truth about Arizona's sharks — both prehistoric and contemporary.