Actully what is stated before is incorrect. The body can survive without sleep. There is no proven beneficial evidence to suggest that humans need sleep to survive and scientists are still not sure of why it is genetically within us that the body makes us feel tired and fall asleep. There has been no concrete reason, no idea e.g. suggesting that sleep is needed for reproduction of cells or something along those lines, it was just an evolutionary trait that kept with us after thousands of years. Sleep is not critical for survival.
