The correlation between obesity and inadequate sleep has been known for some time.  But does one cause the other or are they coincidental?  It’s also known that inadequate sleep increases hunger, an effect I can attest to from my memories of medical training.  I always ate more than usual on the days following nights spent in the hospital. So people who don’t sleep enough feel hungrier and presumably eat more than people who get enough sleep.  Is that the only mechanism connecting poor sleep to...