New Sky Nature series Whale With Steve Backshall, sees Steve, 50, have a heart-stopping encounter with a killer whale off Norway's Arctic coast.

Despite the name “killer whale,” there’s only one well-documented instance of a wild orca attacking someone — Hans Kretschmer, who was bitten on the leg while surfing in California in 1972.

Killer whales are known for their intelligence and power, even an inclination to sink yachts. Now, research is showing how they take down prey that few other animals can. Orcas in Mexico's Gulf of ...