Our study shows that fossil shark teeth are more resistant to these types of changes due to their outer enamel-like surface. Remarkably, fossil shark teeth are also incredibly abundant.
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.
Great whites get all the glory, but bottom-dwelling sharks bring plenty to the table. Here, we're looking at some of our favorite seabed shark species.