Based on its whimsical name, it’s easy to assume that the cookiecutter shark is cute and gentle. However, nothing could be further from the truth. In fact, the name “cookiecutter” doesn’t refer to the ...

Tiny sharks have long been blamed for the eerily perfect circles carved into the skin of whales, dolphins and even submarines, but until recently the details of how they pulled off this surgical ...

In the deep ocean, far from sunlight, a small shark has been quietly carving perfect circles of flesh out of animals many times its size. For decades, those neat, crater-like wounds on whales, tuna, ...