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What's the world record for not sleeping?

11 days and 25 minutes The longest time a human being has gone without sleep is 11 days and 25 minutes. The world record was set by … American 17-year-old Randy Gardner in 1963.

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The longest time a human being has gone without sleep is 11 days and 25 minutes. The world record was set by American 17-year-old Randy Gardner in 1963. Others including Finland’s Toimi Soini and the UK’s Maureen Weston and Tony Wright have since claimed to have beaten this time, but none of them were studied as closely as Gardner. Without close monitoring it is difficult to verify these claims. The effects of sleep deprivation are well documented, with symptoms including irritability, taking longer to make decisions, and cognitive rigidity, in which individuals can only think about things in one fixed way. Other side effects include loss of motivation, higher blood pressure, paranoia, memory issues, mood changes, visual problems, hallucinations and difficulties with speech. Gardner’s record was observed by William Dement, who noted that Gardner experienced many of these side-effects, including an impairment of his cognitive and sensory abilities. He didn’t consume any stimulant drugs to keep himself awake, but did have people around him to distract him from falling asleep. When the experiment ended, Gardner had been awake for 264 hours and 25 minutes. He then had 14 hours of sleep before waking up to use the bathroom. We have no verified examples of anyone staying awake longer than Gardner, and we still don’t know for sure how long human beings can survive without sleep. The long term side effects of a lack of sleep can be serious. Lab rats deprived of sleep die within a month, and people with the rare hereditary disease fatal familial insomnia (ffi), who lose the ability to sleep, can meet the same fate within three months. So will your body eventually force you to sleep if you don’t go to bed on time? Anyone attempting to stay awake for long periods of time will likely end up slipping in and out of “microsleeps” – seconds of sleep that occur without you noticing them, often with your eyes open.

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Can humans sleep underwater?

Animals like marine mammals exhibit unihemispheric sleep because they have to come to the surface to breathe. You can't truly sleep underwater when you need to breathe air. This means that half their brain gets to rest while the other half remains alert.

savethemanatee.org - How Manatees ""Sleep""

How Manatees “Sleep”

It’s more accurate to say that manatees rest, for up to 12 hours/day. Animals like marine mammals exhibit unihemispheric sleep because they have to come to the surface to breathe. You can’t truly sleep underwater when you need to breathe air. This means that half their brain gets to rest while the other half remains alert. Humans, on the other hand, sleep bihemispherically. Only a couple of studies have been done due to the invasive nature of the required procedure and the impropriety of conducting such tests on protected species. But it does make sense that manatees would exhibit unihemispheric sleep since they need to come to the surface every 20 minutes, requiring motor function and a wakeful state to do so.

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Read How Do Marine Mammals Sleep In The Oceans? at Biosphere Magazine.

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