Baleen is a flexible, keratin-based filtering system that allows whales to feed on massive amounts of tiny prey efficiently. Different baleen shapes and sizes reflect different feeding strategies, ...

Toothed whales use sound to find their way around, detect objects, and catch fish. They can investigate their environment by making clicking sounds, and then decoding the "echoic return signal" ...

Whales are mighty. Blue whales, for example, aren't only the largest animal on Earth, but as far as we know, they're the largest animal that's ever existed on Earth—and that includes dinosaurs.