First electrophysical recording of sleep in a wild animal

In the first experiment to record the electrophysiology of sleep in a wild animal, three-toed sloths carrying miniature electroencephalogram recorders slept 9.63 hours per day—6 hours less than captive sloths did, reports an international team of researchers working on the Smithsonian Tropical Research Institute`s Barro Colorado Island in Panama.

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