Marine researchers are studying sharks by attaching tracking devices to them. The goal is to learn more about these predators and their population. A researcher found that a shark's skin is remarkably resilient, even snapping a strong scalpel.

Researchers are catching and releasing various shark species to gather data. They are taking tissue samples and attaching small devices to track the sharks.

Further details about this research are available, including the types of sharks being studied and the methods used to track them.