What To Do When You Wake Up If You're An Early Riser

Margaret Thatcher was famous for needing only four hours of sleep. That's the popular wisdom, at least; her critics might argue that chronic sleep deprivation explains some of the crazier policies of her latter year. What researchers now appreciate about sleep is that, as your brain tires, it sucks energy (in the form of glucose) away from the areas needed from critical thinking, in favor of those areas that keep you alert. So you can turn up--you just can't think very well. What is striking abo...