The Human Body
If you sleep 8 hours a night, how many years in total will you spend asleep over a 78-year lifespan?
Answer
26 years
That's a full third of your life unconscious — including roughly 6 years spent dreaming. Staying awake is so dangerous that Guinness World Records stopped accepting 'longest time without sleep' attempts in 1997.
Source: Sleep Foundation; Guinness World Records via NPR
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