Visitors to Antarctic waters got the show of a lifetime when several orcas went on the hunt for a penguin. The video has gone ...

Wild orcas occasionally approach humans and offer us food, according to a new study — but scientists aren't sure why. Researchers have documented dozens of cases of orcas (Orcinus orca), also known as ...

(CNN) — When researcher Jared Towers set up his cameras underwater to observe a pair of killer whales, he saw something strange. She closed her mouth, paused, apparently watching for Towers’ reaction ...