Ever wonder why sharks have so many differently shaped teeth or why they keep regrowing throughout their lives? Dr. David ...

When you think about sharks, the first thing that might come to mind are huge jaws filled with rows of deadly-looking teeth. But shark teeth come in many shapes and sizes. They can tell us how these ...

Rare megalodon shark teeth are up for auction in Saint John, N.B., with bids already reaching over $1,100. The fossils are up ...