Will you live on 4 hours sleep a day?

My friend told me of a sleeping cycle that you can live on and it takes 2 weeks to adjust. Apparently you sleep every 3 hours for 1 hour and you will survive but if you miss a cycle you die. Hes pretty smart but I thought its impossible because I read your body sleeps in 1 and a 1/2 hour cycles and repeats and it... show more My friend told me of a sleeping cycle that you can live on and it takes 2 weeks to adjust. Apparently you sleep every 3 hours for 1 hour and you will survive but if you miss a cycle you die. Hes pretty smart but I thought its impossible because I read your body sleeps in 1 and a 1/2 hour cycles and repeats and it takes 3 hours for your body to realise your sleeping and start dreaming. So whos right me or him?
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