Shark sex is a bitey business, with males grasping females with their teeth during the act. The resulting wounds are helping scientists to figure out when and where sharks are doing the deed.

They produce teeth continuously ... NOVA: Do sharks have to roll over to bite? Gruber: No way, Jose! Sharks have a unique, loose jaw suspension that allows them to raise their snout and loosen ...

Meyer said Wednesday that there are “no meaningful protections” outlined in the bill because fishing for sharks is already rare in Hawaii and that the waters here already provide an adequate ...

Although mating has never been scientifically observed, scars on female sharks suggest that males use their teeth to hold onto while mating. Based on their estimated growth rate, length and number ...

Greenland sharks have narrow, pointed upper teeth and broader, squared teeth on the lower jaw. Holding large prey in position with their upper teeth, they roll their head in a circular motion ...

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.