Oh so is this why I can't function properly without 8 hours of sleep?
"A new study suggests that the amount of sleep you need may be written in your genes.
A team of researchers has found a genetic mutation that appears to allow some people to get by on less sleep than others. The team found the unusual mutation in a mother and daughter pair who appear to sleep less.
Sleep is essential to life, and not getting enough can cause problems. Studies show that sleep-deprived individuals have trouble performing everyday tasks, such as driving a car.
"Normal people need eight to eight-and-a-half hours of sleep," says Ying-Hui Fu, a neurologist at the University of California at San Francisco who led the study. By contrast, the two people with the mutation seemed to need just five or six hour's rest each night. The work appears in Thursday's issue of the journal Science."
Read the rest here...