And most importantly, sleep helps clean "brain junk" (layman terms intended) See http://www.sciencemag.org/content/342/6156/373 http://www.sciencemag.org/conte

And most importantly, sleep helps clean "brain junk" (layman terms intended) See http://www.sciencemag.org/content/342/6156/373 http://www.sciencemag.org/content/342/6156/373