Ill sleep when Im dead

I've often argued that the amount of sleep a person needs and his or her subsequent alertness is more a state of mind than actual physiology. Of course, this is coming from a guy who just slept four hours last night and is feeling just fine, so my opinion is admittedly biased.

But new research seems to be at least leaning in my general direction.

A study from the University of Vermont and appearing in Psychopharmacology this year has found that the effects of caffeine on a person's...