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 ...

Killer whales are the only natural predator of baleen whales — those that have “baleen” in their mouths to sieve their plankton diet from the water. More solitary than toothed whales, baleen whales ...

Orcas have long been revered for their intelligence, adaptability, and group-hunting strategies. But one scientific review spanning two decades has revealed a little-known, yet intriguing behavior.