I never feel tired anymore. It's very difficult to fall asleep at night, I'll lie awake at night for hours, often just to give up and get up, having not slept at all. I don't think it's my circadian rythm, because I don't feel tired during the day either. No caffeine, no drugs of any kind. I don't mind, but my family is worried about me.

So what is going on? Have I evolved beyond the need for sleep?