Stack Exchange Network

Stack Exchange network consists of 174 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 [reality-check]

Asks if a given concept is realistic in a given context. Answers should say yes or no, with supporting info. Compare this with the science-based and hard-science tags. This tag should never be the only tag on a question, because this tag frames how a question should be answered, not the topic.

13
votes
5answers
358 views

Feasibility of a Crystal Ecosystem

In my Fantasy world there exists a crevice. Plants and animals made of glittering, iridescent crystalline structures in abundance. The crevice can contain any arbitrary materials that might make the ...
11
votes
7answers
2k views

As a super-natural, how do I really transfer into a school [closed]

Aliens, robots, Biblical creatures disguised as a cute girl transfers into [protagonist] school is a cliche. But, how do I really do it? Assume, Local skin tone, Accent, Mid-class and other ...
-1
votes
2answers
86 views

Explosion-powered low-tech elevator

I am making a world where people live without access to many raw materials, including metals and wood. Among other things they harvest their own dead for a paper analogue. Another thing that is ...
9
votes
3answers
178 views

On an Earth regularly ravaged by solar storms as strong as as the Carrington Event, how would technology advance?

The world I'm thinking of is a large moon of a gas giant. It's fairly Earth-like, perhaps a bit smaller, might be a bit magical, but sits about where we sit around a star very similar to ours, except ...
0
votes
1answer
159 views

A Mosasaur With Gills? [closed]

What if a bunch of mad scientists genetically engineered a mosasaur like creature, but with gills so it doesn't have to surface. Let's say it would be about 60-80 feet long. Would the gills be placed ...
1
vote
1answer
108 views

Two planets with the same orbital period [duplicate]

I have the following star system configuration: All bodies always stay on one line. Star is similar to sun by parameters. "Green" planet is Earth-like exoplanet with 1 earth-year orbital period, ...
5
votes
3answers
194 views

Would it be possible to create tides that fluctuate every 25 days and rise/recede quite drastically. possibly up to a mile

Like the title, my world has drastic tides that complete a cycle in roughly 25 days. is this possible? My limited knowledge of astronomy leaves me pretty limited. I understand that there would have to ...
3
votes
2answers
86 views

If a lake feeding a large river system was suddenly drained, how would it impact the area? [closed]

In my book series, there is a very small planet (slightly smaller than Earth's moon). This is called Planet Squid, and it has a climate and group of cultures very similar to those of sub-saharan ...
23
votes
12answers
8k views

Is it possible to bind multiple ships together on open water?

In Renaissance period, would it be possible to safely bind ships together for extended periods of time? Imagine if there was a fleet of large ships (say, two dozen) that have been traveling over a ...
2
votes
5answers
240 views

Is it possible to hide suicide pills in beverages as beans, fruits, etc to assassinate someone

Adam asks an alleged assassin to drink some of the beverage he had just bought. Assassin did as bid. Adam was shocked. Adam walked away and drank from the cup. He felt something in his mouth, then ...
1
vote
0answers
62 views

Flora and fauna from a darker, foggy planet [closed]

In a previous post, I consulted about the characteristics that a earth-like planet could have, if it's covered by a permanent mega-fog, with a chemical composition similar to water vapor, which ...
7
votes
3answers
1k views

Realistic darkvision?

This question is similar to "How would the human eye need to change in order to see in low light without any changes to physical appearance?", including the apsect of change to the human eye, only the ...
4
votes
3answers
278 views

Designing a mega-fog

Considering some of the answers given in a previous question, I would like to ask what climatic phenomenon would be necessary to generate a mega-fog, thick enough to at least reduce the intensity of ...
5
votes
3answers
187 views

If 50 members of a species were given intelligence, how long would it take to evolve?

On the planet Qualis, about 2 million years ago, their was a species of lizards, called “Quals”. They were about as smart at the common Earth rat, not very smart. They dwelled in the semi-arid regions ...
9
votes
3answers
169 views

Is this planetary moon's calendar possible?

I'm attempting to create a world that has very brutal, hard swinging weather and environments, leaving much of the planet desert-like. The world I've designed is a moon of a gas giant. The Parent ...
8
votes
1answer
147 views

What kind of Gas Giant has a “safe zone” between the radiation from a star and the radiation from a gas giant planet?

This is a progression from my first question, here (if this is too similar to my original question, please let me know of a better way to address this, as I am not getting the answers I need on that ...
2
votes
4answers
158 views

How To Tell a Turtle Sans Shell [closed]

On our Earth, what makes a turtle a turtle is its ribcage widened and fused to create a tough, protective shell. In comparison to other reptiles, alive or extinct, the turtle design has got to be the ...
3
votes
5answers
1k views

Logical explanations for the corpse of a time traveler

Tim managed to create a time machine in secret. Foolishly, he used it on himself, like all good (movie) scientists do and traveled back in time. He thought he configured the machine to five minutes, ...
48
votes
5answers
6k views

Anatomically correct sharknado shark

Raining animals is a rare meteorological phenomenon in which flightless animals fall from the sky. Such occurrences have been reported in many countries throughout history. One hypothesis is that ...
40
votes
20answers
15k views

Why don't Vulcans just take the pills?

I am well aware that this question is on the border between the Worldbuilding and the Sci-Fi site. I decided to post it here, because I am seeking for a general society/worldbuilding answer and "...
7
votes
3answers
227 views

A darker, foggy planet

After many, many attempts on worldbuilding, I decided to go back to an old project of mine. I need to design a planet that, at the same time, is habitable but hostile to human life. I would like ...
21
votes
9answers
6k views

How to police a state with high amount of gun ownership where the police are not routinely armed?

Background In a country with similar demographics to Switzerland, the gun ownership is high for the population (60 - 70 guns per hundred people) while the police force are not armed on a regular ...
6
votes
2answers
195 views

What would a medieval steam locomotive look like?

My question is pretty simple, if the steam locomotive were invented during the middle to late medieval period, what would it look like? We are just going to ignore how it was invented. My guess is ...
13
votes
1answer
230 views

Planet-wide vocalizations: is there a natural limit preventing it?

Premise I recently recalled when the Chelyabinsk meteor crashed overhead in 2013. The pressure wave was immense. The infrasounds, as recorded by nuclear missile detectors, appeared to traverse the ...
1
vote
3answers
284 views

If a character was starved for a long period of time but was able to recover, what would the permanent side effects be?

In my book series, there is a small planet called Eaglypt. On this planet, there is a huge famine because an evil space overlord named Tate magically summoned a sandstorm that choked up the oasis (and ...
4
votes
5answers
228 views

What is the feasibility of a space port?

Let me explain what I mean by space port. I'm playing with the idea that mankind has finally built the space elevator. After the first space elevator was built, the other space elevators were far ...
37
votes
3answers
7k views

Would EMP From a Nuke Stall a car?

In my story a man who works in Military Intel gets early warning that a nuclear attack on his base is inbound. He abandons his post, grabs his wife and kid from on base housing, and books it out of ...
4
votes
4answers
192 views

How to safely drop victims into the Tayan’s mouth?

Beneath the sands of Dalia, their exists a beastly, horrifying creature. The Tayan. The Tayan is an antlion like insectoid creature, that buries itself underground, and waits for prey to fall in its ...
10
votes
5answers
852 views

Can sustainable farming be done in the suburbs in this supernatural post-apocalyptic scenario?

So, here's my situation: my first book revolves around an unknown entity giving modern day humanity an assortment of supernatural powers. Every week a new power is given to everyone on Earth over the ...
29
votes
16answers
13k views

Best places to be on Earth when an all out nuclear World War III breaks out?

This is a world building question in a preventative context because those people or countries would be left fully functional while others gone and the safe areas is where the world building would ...
5
votes
2answers
141 views

What would the size constraints on my creature be?

Context This creature right here is one of the decedents of placoderms that that transitioned from rivers to land. The got onto land during the Middle Devonian and remained isolated from all other ...
7
votes
2answers
221 views

What geological consequences would result from a binary planet system?

Before picking specs, I need to ensure feasibility. Only one of the planets need be Earth-like; in fact, I would prefer if the other planet were rather small and dead, like a moon. The orbits will be ...
3
votes
6answers
1k views

Feasibility of “in situ” ammunition production and salvage

In a (relatively) near future setting, several factions scramble to militarize as civil unrest on their planet turns into civil war. Factories are reprogrammed and prototypes sent to the front, guns ...
5
votes
6answers
714 views

Geoengineering for dummies

My human civilization is facing (much like us) the threat of anthropogenic climate change. For whatever reasons, they are unwilling to take action by reducing the use of fossil fuels and refuse to use ...
0
votes
4answers
175 views

How to manipulate a town to improve it? [closed]

So there's this town of 80.000-90.000 people which grew quickly with the industrialization boom, but nowadays there are no big companies here, nor good opportunities for young people. So the youth is ...
1
vote
1answer
122 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 ...
8
votes
2answers
245 views

Would it be possible to create an artificial iron star?

I ran a quick calculation, and the mass of iron required to form a black hole is on the order of 10^40kg. So, suppose that in my story there is this almost much iron available to somehow be brought ...
-2
votes
4answers
226 views

Why would god-like aliens experience boredom? [closed]

On planet Methuselah, the oldest planet in existence, there exists a race of beings that seem to be, in most definitions of the word, gods. They can form objects out of pure energy, have strength ...
5
votes
5answers
317 views

What is keeping my Terror Bird from being the size of a T. Rex?

Background This is a Terror Bird: Specifically, this is Titanis one of the largest of the carnivorous Phorusrhacidae; it was perhaps 2.5 meters tall and 150 kg. I would like a terror bird that is ...
2
votes
3answers
202 views

Making bricks out of bread

Some kinds of bread get hard as time passes by. These kinds that harden usually stay soft for no longer than a day after being baked. I've once forgotten a loaf of bread for about a week on a shelf - ...
0
votes
2answers
94 views

Foul Smelling Flatulence Flyers

I am trying to flesh out the details of an interesting animal (for D&D) that will both disgust my players while at the same time have them think the animal is a "useful" creature. I want the ...
7
votes
2answers
273 views

Would having ZW sex-determination system have any drastic effects on humans?

I'm trying to make a world where my "humans" have ZW sex-determination system that means sex is determined in the ovum instead of the sperm. Could I just easily hand-wave everything else as being the ...
3
votes
1answer
94 views

Virus-like contagion with limited activity time

I'm looking for ideas for a highly contagious airborne biological weapon (virus, bacteria, other) that would kill its host in a matter of days to a week or so, but that, once all infected hosts are ...
15
votes
9answers
3k views

Can a house cut off from the world still have water for a short time?

Related to this question a bit, the house I'm talking about was swallowed into another dimension along with parts of its garden. The house itself stays completely intact, but the piping is cut off, ...
3
votes
5answers
308 views

Defensive options for a 500km gap with steam trains and fireball mages?

World: The world is 1/4th the diameter of Earth, and there are 2 continents + the poles, like our poles. Esia, 25% of the size of real-life Asia, and Aurope, 25% of the size of real-life Europe. Their ...
5
votes
4answers
182 views

How to provide health care in a rugged, vast and low populated country?

Background In a far flung land, there exists the country of Coldesia. It is large, around the size of the US state of Alaska. Most of the country is covered with either barren mountain ranges or ...
6
votes
3answers
396 views

Plausible materials/chemicals for a sentient blob creature to be made out of

In my book series (link here), there is a blob creature (lime-green in color, has a radioactive glow, is sentient, has a bizarre and uncanny intelligence level (has the emotional intelligence and "...
28
votes
3answers
4k views

How far can you travel on horseback while pushing the horse to the brink?

Wanting to keep my writing realistic, I try to keep distances traveled in the humanely possible range. The current setting is thus: Medieval style world, roads available, they are travelling north, ...
2
votes
2answers
110 views

If one traveled along a Closed Time-like Curve to arrive in a parallel universe/world-line, would the previous universe cease to exist?

This question makes several assumptions: 1) The "Many Worlds" Interpretation will have been proven through future observation 2) CTC's exist within the rotating event horizon of a Kerr black hole 3)...
8
votes
6answers
2k views

Could a medieval planet industrialize/modernize if it was conquered by a more advanced culture for 19 years?

In my book series (link here), Aurea (a planet based on Byzantine Anatolia) is conquered by a group called the Tatians, who have access to technology that would not be out of place in Star Wars (...