Sleep is a naturally recurring state characterized by reduced or absent consciousness, relatively suspended sensory activity, and inactivity of nearly all voluntary muscles. It is distinguished from quiet wakefulness by a decreased ability to react to stimuli, and is more easily reversible than being in hibernation or a coma.
Questions tagged [sleep]
125 questions
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How did people sleep in the past?
Recently I was told by a friend:
People used to sleep in two shifts, one from 8pm to midnight, then wake up for an hour or two, before taking a second sleep shift from 2am to 6am.
He claims that this has been alluded to in books of the time but…
user288447
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Are any animals nocturnal?
Several animals are commonly considered to be 'nocturnal' by nature.
Nocturnality is an animal behavior characterized by activity during the night and sleeping during the day. The common adjective is "nocturnal".1
Some examples include owls and…
Eric B
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Does excessive menthol cause sleepiness?
Does over consumption of menthol cause sleepiness?
I found no substantial sources either to suport or refute this argument. I have heard it from a few sources not perfectly reliable.
I do know that consumption of cough drops does cause.
By over…
700resu
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Why does small amount of night time sleep makes a person more tired when he wakes up?
Assume that you go to sleep at 0:00 am and wake up at 3:00 am.
Why do you feel more tired (compared to your tiredness at 23:59) when you wake up at 3:00 am? Why does sleep makes us more tired in this case? Is there a critical sleeping period for a…
hkBattousai
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Does your wifi router mess up your melatonin which messes up your sleep?
From https://www.kitguru.net/channel/generaltech/larry-alton/3-reasons-to-upgrade-your-network-with-cat6a-ethernet-cables/
If you’re one of thousands of people who suffer from EMF sensitivity,
the ability to get rid of your wireless router is one…
Konerak
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