Ever wonder why sharks have so many differently shaped teeth or why they keep regrowing throughout their lives? Dr. David ...

A woman had a close encounter with a shiver of nurse sharks while snorkeling in the Maldives. Footage shows the moment when the bottom-dwelling creatures swam in her space.

Sand tiger sharks, also known as gray nurse sharks, have a deceivingly ferocious ... which allows them to float motionless in the water, seeking prey. They are voracious predators, feeding at ...

What makes nurse sharks deadly? Nurse sharks have their own unique hunting technique, using their powers of suction to literally vacuum up their prey. Even the conch, with its thick shell can't ...

The “surprise” birth of a gray nurse shark in Australia is good news for the endangered predator species. Getty Images/iStockphoto Months after endangered gray nurse shark Mary-Lou was seen ...