Sperm whales communicate with vowels
AS READERS OF “The Hitchhiker’s Guide to the Galaxy” will know, humans are only the third-cleverest species on Earth. The first two places go to mice and dolphins. But perhaps Douglas Adams’s comic novel should have included dolphins’ cetacean cousins. Scientists have been studying the complex vocalisations of whales ever since they first discovered the evocative songs sung by humpback whales in the 1960s.
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