Shark tooth fossils in sandstone matrix, Lamna obliqua, Eocene Epoch (56 to 34 million years ago), ... [+] Morocco, (Specimen courtesy of Ron Stebler, Scottsdale, Arizona, USA), (Photo by Wild ...

Remarkably, fossil shark teeth are also incredibly abundant. Sharks ruled the earth's oceans for 400 million years, and every individual grows and sheds thousands of teeth in their lifetime.

Three children show and discuss their wobbly teeth. They visit an aquarium and find out about sharks’ teeth before talking about the differences between shark and human teeth. Students could be ...

A "serrated blade" found sticking from a rock in the United Kingdom has been identified as a "nearly perfect" prehistoric shark tooth, experts say. It belonged to a Squalicorax falcatus shark ...