Rare Shark Spotted In Russian High Arctic, Researcher Freaks Out

After staring at a barren seafloor for nearly three hours, National Geographic's Alan Turchik couldn't believe his eyes when a rare deep-sea Greenland shark suddenly drifted across the screen. (Warning: an excessively long stream of bleeped-out expletives to follow) » 12/17/14 6:20am 12/17/14 6:20am

These sharks are so slow they can only catch you if you're asleep

Greenland sharks live in by far the coldest waters of any shark species. That's bad news for a cold-blooded species, and the best way to conserve their energy is to move as little and as slowly as possible. » 6/24/12 2:00pm 6/24/12 2:00pm