Question

How long can someone survive without sleeping?

Answer 1

A person can go 3 weeks without sleep

Answer 2

It has even been said that one could survive for three times as long without food as one could without sleep. Indeed, one of the better known experiments on this subject, found that depriving rats entirely of sleep resulted in their death, or near-dying state, within 11-32 days (Everson et al. 1989).