WASHINGTON, March 2 (Reuters) - Dolphins, porpoises, killer whales, sperm whales and other toothed whales produce an array of sounds - to find prey employing a sonar-like system called echolocation ...

KELLY: It's the song of a humpback whale, a type of baleen whale. COEN ELEMANS: All the baleen whales make extremely low frequency sounds, and it sounds like a bit like humming, like, (imitating whale ...

Scientists photograph the elusive ginkgo-toothed beaked whale, the source of the BW43 echolocation pulse, for the first time.

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Scientists have long struggled to study how whales produce sound. A new paper in the journal Nature paints the most complete picture yet of how baleen whales produce their iconic, haunting calls.

COEN ELEMANS: All the baleen whales make extremely low frequency sounds, and it sounds like a bit like humming, like, (imitating whale sound), something like this. And it's really hard for me to do ...