A 500-year-old shark, a $7 million study, and a baffling disappearance—what happened? Scientists spent years tracking Greenland sharks, one of the longest-living vertebrates on Earth, in an effort ...

Above a reef deep in the Indian Ocean, a tiger shark is trailed by remoras, which conserve energy by attaching themselves to the shark and feeding off scraps of its prey and parasites on its skin.

Often referred to as “dustbins of the ocean” Tiger sharks are known for eating some strange things and are often thought of as mindless eating machines. But in actual fact, these sharks are ...