Over time, that name morphed into "killer whales." Scientists don't know whether orcas kill for fun. The marine mammals do some things, like killing and tossing dead porpoises in the air ...

Unlike other predators, orcas sometimes kill for fun. They have been observed tossing seals, hunting in groups, and playing with their prey before the final strike. Orcas have different hunting ...

Discover 10 lesser-known facts about the blue whale, the largest animal on Earth. Learn about its diet, communication, ...