I think that's pretty highly dependent on the individual. There's an article about the surgeon Charlie Wilson who slept around five and the half hours a night a

I think that's pretty highly dependent on the individual. There's an article about the surgeon Charlie Wilson who slept around five and the half hours a night and yet excelled at his craft. Article is at http://www.newyorker.com/archive/1999/08/02/1999_08_02_057_TNY_LIBRY_000018760?printable=true http://www.newyorker.com/archive/1999/08/02/1999_08_02_057_T... You can search for the phrase "He goes to bed somewhere around eleven at night and rises at 4:30 A.M".