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We may appear to have little in common with sperm whales – enormous, ocean-dwelling animals that last shared a common ancestor with humans more than 90 million years ago. But the whales’ vocalized communications are remarkably similar to our own, researchers have discovered.

Not only do sperm whale have a form of “alphabet” and form vowels within their vocalizations but the structure of these vowels behaves in the same way as human speech, the new study has found.

Sperm whales communicate in a series of short clicks called codas. Analysis of these clicks shows that the whales can differentiate vowels through the short or elongated clicks or through rising or falling tones, using patterns similar to languages such as Mandarin, Latin and Slovenian.

The structure of the whales’ communication has “close parallels in the phonetics and phonology of human languages, suggesting independent evolution”, the paper, published in the Proceedings B journal, states. Sperm whale coda vocalizations are “highly complex and represent one of the closest parallels to human phonology of any analyzed animal communication system”, it added.

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