Sounds interesting. I know the ARMY has conducted numerous experiments on this subject. I have a friend that was a ranking officer and was over seas for quite some time. He told me that his unit slept an average of four hours a night, and was on patrol/working the rest of the time. He said that the first week was really rough, constantly tired ect. But after that the body got used to it and functioned tottaly normally. I'll have to try to find some hard evidence online on this one. I know how many critics are on here and want evidence!