Many scientists have studied sleep and why it is that we devote so much of our time to sleeping. New evidence from a recent study by Maiken Nedergaaed and colleagues at the University of Rochester in New York has refreshed a long-held hypothesis that during sleep the brain cleans itself. The scientists studied mice to find that sleep allows fluids to easily run through the brain and clean out metabolic toxins, essentially cleaning the brain of garbage. Check out this video from D News about the study and it's findings. http://www.youtube.com/watch?v=0o2yyO0JAes Make sure you get your sleep so you can dump the junk from your brain!