In "Dangerous Animals,' Jai Courtney plays an Australian tour guide who steers you out to sea and lets you swim the sharks.

Some doubted the species ever existed at all. But the Endangered Wildlife Trust says two of its researchers have found and ...

A classic example of phoresy, the remora uses a modified fin that latches onto larger animals like a suction cup. Here three remoras (Remora brachyptera) ride a Chilean devil ray (Mobula ...