By the time the biologists measured the shark's age, it was already dead. However, it's an incredible discovery. And who knows? Perhaps it has a 400-year-old that's still swimming around somewhere.

Our first prehistoric hunt in a creek loaded with history! Fossils and shark teeth in every shovel full! Crazy fun hunt! Tons of great finds all older that megalodon! Alabama fossils and shark teeth!

As one of the largest predators to have ever lived, megalodon captures people's imagination - and for good reason ... The oldest definitive ancestor of megalodon is a 55-million-year-old shark known ...