Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [sleep]

For questions about the state most animals enter for several hours every night to recharge their minds and bodies.

72
votes
16answers
5k views

Random body shuffle every night—can we still function?

Imagine a world where every time you wake up you wake up in a randomly selected body from among the bodies that were asleep at that time. There are some limits—the body should be in at most a roughly ...
5
votes
3answers
183 views

What is the optimal sleep scheduling strategies for a 24h sleep cycle on a 48h day planet?

I have a planet with days that is exactly two times longer than in real world. I'm trying to find out the best time to sleep if people still need as much sleep as they do even if they are on a planet ...
12
votes
3answers
1k views

How can an evil spirit take control of a human body during REM sleep?

I have a friend who is a really nice guy. The problem is that he was born as a half demon. While he looks completely normal, he possesses a spirit inside him called "Amon". This being forces him to ...
10
votes
4answers
1k views

Ways other than sleep to restore cells/neurons

So I have a planet with multiple species on it. My planet is tidally locked. I know it is generally thought a tidally locked planet couldn't harbor life because of the extreme temperatures, but my ...
5
votes
2answers
147 views

2 weeks day, 2 weeks night, how would the sleeping pattern of the planet's dominant species work with a 28 'day' Day?

Okay, so I have this binary planet system. The main planet a bit bigger than earth with a size appropriate moon-planet. Both are habitable and with a humanoid species that evolved there. But, I know ...
0
votes
1answer
88 views

How could the invention of cheap stasis pods affect people? [closed]

I am interested in the idea of creating a story around a world where cheap stasis pods exist. So stasis costs would be a fraction of normal living costs. So people that are poor could choose to spend ...
1
vote
1answer
127 views

Might it be possible to work while sleeping without significant long term health complications?

One aspect of the world I'm conceptualizing is that some employees might opt to work while in a medically induced coma, or work at night while they sleep by using brain implants that induce a type of ...
2
votes
2answers
105 views

How would a humanoid need to change to sleep upside-down?

Related: What parts of the human body would be negatively affected by sleeping upside down? I have a character (a regular human in structure) who, for his own reasons, decides to act bat-like and ...
6
votes
2answers
257 views

What parts of the human body would be negatively affected by sleeping upside-down?

I have a character (who is human) who, for his own reasons, decides to act bat-like and sleep hanging upside-down. Handwave the feet/attachment issue. Which parts of a human body would be affected ...
2
votes
7answers
3k views

How long do slaves work each day?

In my imaginary world the main character's country has fallen and they now live as slaves. The conquering country is cruel, and treat the slaves so badly that basically everything that they do to the ...
7
votes
8answers
2k views

1 in 10,000 people no longer need to sleep. Would different laws need to apply to them? [closed]

Tomorrow, 0.01% of the world's population will wake up and no longer need to sleep. (Some of these Awakened people may then be incapable of sleeping any more, but that's incidental). To give a rough ...
0
votes
1answer
201 views

Could Alice's hair send people to sleep without just knocking them out?

So recently I asked this question about Alice, the tips of whose hairs (body and head hairs) could (in that question, not this question) paralyze or poison people. I thought: what if her hairs only ...
19
votes
17answers
6k views

How would a superhero who needs to fall asleep to use his powers fall asleep during battle?

The Dreamer (a.k.a. The Sleepy Psychic by his teammates and enemies alike) has telepathic powers. The problem is that, while extremely useful, he can only use them whilst sleeping. My question is, how ...
1
vote
3answers
181 views

Would it be possible to make a container that induces sleep?

I had a dream the other night about an alien invasion. In this dream, I was one of the first people to be aware that the aliens had landed, and of course I wanted to warn others. The aliens were ...
8
votes
4answers
266 views

Realistic underground shelters for long time hibernation for mainly humans

Short variant of question: I have few big natural caves (really big). I want to transform it into shelters capable of keeping ~2.000.000 humans in hibernation, sleep, suspended animation or other ...
1
vote
4answers
603 views

Alternative to cryogenic sleep / deep hibernation?

In a not-so-distant future, around 2300, mankind finally find a way to keep the body intact over hundred of years, allowing a limited number of humans to travel over hundreds of years in order to join ...
7
votes
3answers
515 views

An animal that puts its prey to sleep

Hunting is dangerous; even for the predator, hunting can result in death. There have been countless example where a predator was killed by what was supposed to be prey. Animals have evolved many ways ...
1
vote
2answers
157 views

Trying to make a dreamscape/dreamworld with real-world inspirations…? [closed]

I am trying to craft a story around the idea that, when we dream, we actually access another indeterminable plane of existence, a kind of repository into which the dreams and thoughts of all living ...
-2
votes
2answers
2k views

Effects of totally sleeping vs. just closing your eyes [closed]

Will totally sleeping (closed eyes, unconscious) have the same effect physically with just lying in bed and just closing your eyes even if you're still conscious?
13
votes
10answers
8k views

What if our planet had only daytime?

What if our planet was always lit so that there would be no nighttime? Assume that the scenario is like this, where A is the planet and B and ABb are the stars. And they are all aligned so that it ...
2
votes
4answers
883 views

Effect of 32 hour days?

What would the effect on humans be of a 32 hour day rather than 24 hours? It would be a pretty much even split of 16 hour days, 16 hour nights. The people would have previously been on a spaceship for ...
3
votes
1answer
197 views

The Sleepless City

Basic Question: What about happen if scientists discovered a way to prevent or dramatically reduce our need for sleep? Let's say we have a normal earth with current technology, but with one major ...
7
votes
12answers
1k views

What would cause a city to sleep during the day and work at night?

It's a sprawling city, similar to that of Whiterun (capital of Whiterun Hold in Skyrim) with about 1500 inhabitants. Assume medieval-level technology and weapons, and also assume that the city is ...
10
votes
8answers
947 views

Handling a Dream-Invader Prisoner

Our hapless friend –let us call her Alice – has a prisoner – Bob – and a problem. Here's the situation: for reasons that are too long to detail here, she must bring the ...
10
votes
5answers
1k views

Can a sapient species evolve that needs little or no sleep?

Humans sleep more then nearly any other creature (true sleep, not low-activity like cats and sloths), and are some of the only true sapient species on earth. Many other intelligent, or nearly sapient,...
18
votes
13answers
3k views

Social effect of pill which defers need to sleep

Nobody knows why do we need to sleep. So, I am thinking of inventing handwavy pill, which "cures" our need to sleep. However, it does not cure it forever. If taken as prescribed, you can defer your ...
3
votes
2answers
179 views

How would we thrive on a planet whose rotational period is different than Earth's?

Here, atmospheric pressure/composition, temperature, and gravity won't be considered; let's assume that all of those are the same as on Earth. Would we "rest/stay awake" however long or short it ...
9
votes
2answers
548 views

The end of sleep

In the year 2041, scientists have come up with a genetic modification that obviates the need for sleep in humans. The procedure is harmless, cheap, and has no harmful side effects. The result: you get ...
6
votes
3answers
1k views

Effect of longer day/night cycle on human sleeping patterns

So in a setting I'm developing, a moon orbits a gas giant once every four days. It naturally is tidally locked to the parent body. Halfway through the day part of the cycle there is a two hour solar ...
19
votes
9answers
1k views

If a species didn't sleep how else would they “recharge”?

Humans (and most animals) sleep. The reasons aren't really clear but most people believe: We have to sleep because it is essential to maintaining normal levels of cognitive skills such as speech, ...
31
votes
9answers
5k views

Sleeping on planets with very long days

Consider a planet where a day, that is to say the amount of time a specific (roughly equatorial) point is in sunlight is much longer than on earth. A humanoid race has evolved on this planet. You can ...