These majestic sharks gather in their hundreds at huge volcanic seamounts that project out of the seabed. They come here to be cleaned and to find a mate, circling the seamount in a sort of ...

Scalloped hammerheads on the move. NOVA: Are there any reports of hammerheads attacking humans? Klimley: Yes. The U.S. Navy, in fact, once considered the hammerhead the third most dangerous ...