Do We Sleep to Clean Our Brains?

American scientists think they've discovered the function of sleep: to clear molecular buildup in the brain in what Guardian science reporter Ian Sample calls a "rubbish disposal service."

http://www.truthdig.com/eartotheground/item/do_we_sleep_to_clean_our_brains_20131018?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%253A+Truthdig+Truthdig%253A+Drilling+Beneath+the+Headlines