I guess this helps explain why I fall asleep in meetings so often.
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.
http://www.sciencedaily.com/releases/2008/05/080513191934.htm
Jon
