>Say you slept 10 hours a day and lived to 100. In other words, you have 14 wakings hours times 100 years. 1400 hours, in other words. Now compare this to sleep

>Say you slept 10 hours a day and lived to 100. In other words, you have 14 wakings hours times 100 years. 1400 hours, in other words. Now compare this to sleeping 6 hours a day and living to 80. In other words, 18 waking hours. 1440 in a year, in this case. True, but what's the quality of life of those zombie-walking hours?