These Lemurs Have Got Rhythm. Scientists Have Got Questions

The indri is a lemur, a primate with opposable thumbs; a short tail; and round, tufted, teddy-bear-like ears. They share a branch of the evolutionary tree with humans, but our paths diverged some 60 million years ago. Still, one very striking similarity has stuck around: Indris are one of the few mammals that sing. Family groups create choruses in the treetops of their rain forest home in Madagascar; their voices ringing out for miles. Those songs—which biologist Andrea Ravignani describes as sounding like a cross between several jazz trumpeters jamming, a humpback whale, and a scream—are also the only songs other than those made by humans to be structured

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