Jeff Iliff: One more reason to get a good night s sleep

The brain uses a quarter of the body s entire energy supply, yet only accounts for about two percent of the body s mass. So how does this unique organ receive and, perhaps more importantly, rid itself of vital nutrients New research suggests it has to do with sleep. TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world s leading thinkers and doers give the talk of their lives in 18 minutes (or less). Look for talks on Technology, Entertainment