Scientifically speaking, why might I be so tired? I want to do so many things, specifically reading science and math books. But I'm pretty much exhausted after about 3 hours. When I try to read I find myself daydreaming about random things and struggling to focus. I'm just a zombie from there. My joints ache, I feel hungry. For some reason I become very energetic at midnight, and become very productive. I usually sleep at about 2 AM. I get 8 hours of sleep. Anyone else deal with this?