Sharks have ruled the Earth’s oceans for 400 million years. Recent research on fossil shark teeth has discovered an ...

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 ...

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 ...