Killer whales may all look alike, but molecular biology indicates there are at least three distinct species of orca and maybe five or more, researchers reported Thursday in the journal Genome Research ...

Across the world’s oceans, killer whales share the same striking black‑and‑white look yet live radically different lives.

Whatever may be the driving force, killer whales’ use of tools is a remarkable discovery, especially when few animal species ...

Scientists have spotted a subset of killer whales using seaweed to scratch each other’s backs, marking the first known identification of “tool” usage by marine mammals. The “southern resident” killer ...