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.

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33 views

What are some reasons that rocket artillery is impractical in my world?

Under what set of circumstances does rocket artillery and missile technology become impractical but not impossible (i.e. moon missions are doable, but mass-produced ICBMs or anti-ship missiles are not)...
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Would a gigantic meteor impact in the Strait of Gibraltar create a peak-ring crater, or at least a complex one?

Background: A peak-ring crater is a sub-type of complex crater (an impact crater in which the impact wave rebounded from the rim of the crater and pushed up a mountain in the middle) where, instead ...
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Would a meteor blowing up the Strait of Gibraltar 2 million years ago kill all of humanity's ancestor species?

Let's say that, 2 million years prior to the present day, a meteor impacts roughly in the middle of the Strait of Gibraltar. It is large enough and strikes at sufficient velocity to create an impact ...
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2answers
44 views

Earth mages in modern war?

Is there a place for earth mages in modern war? Mages' range: 50 meters Abilities: Beginner level Launching boulders Earth walls Sinkholes (they can be closed after their creation) Intermediate ...
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7answers
2k views

Would a “Hunting Horn” be feasible in a realistic world?

Meet the "Hunting Horn" from Capcom's "Monster Hunter" franchise. While the source video games undoubtedly take liberties, the idea of a large, handheld instrument that plays ...
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1answer
110 views

Whale-sized electric eel shock?

How does an electric eels shock change if it were the size of a whale? The problem I'm trying to elucidate is how a larger voltage from a much larger creature would change the range, power and ...
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3answers
158 views

Via what mechanism could a humanoid entity regrow multiple sets of teeth throughout its life?

I am not asking what the consequences of this would be, nor what kind of humanoid entity might evolve such a thing - simply how it would be possible.
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1answer
99 views

How to submerge a 35x45x25 building in water? [closed]

Context: I’m writing a true crime fiction (I think that’s the genre) story about a serial killer known as “The Electric Eel.” Their M.O. is targeting victims while they’re in water and electrocuting ...
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6answers
158 views

In what way could a moon change phases according to the month?

Let’s say that a planet has multiple moons, and because I don’t want to type “a planet” many times, let’s call the planet Stan. One of these moons changes phase (“phase” being the best word for it, ...
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7answers
2k views

What are some sociological or military justifications for localized nuclear warfare?

I'm not talking about world-ending, global-scale thermonuclear war, nor about massive salvos of missiles being fired at countries by other countries. I'm talking about, say, a few divisional-level ...
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0answers
87 views

Effects of magic on stellar evolution

I believe it'd be foolish to assume that magic wouldn't affect astronomical phenomena like stellar evolution, But since I'm not smart enough to create the equations for a new fundamental force, I have ...
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1answer
104 views

What are some substances that paralyze voluntary muscles in the human body but not involuntary ones, and do not cause any harmful side effects?

The title says it all. I'm not looking for things like curare, where it shuts down the lungs - I need something that basically turns people into ragdolls but otherwise leaves them unharmed. If such a ...
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2answers
50 views

How much energy would a hypothetical organism require to regenerate mild to semi-moderate trauma via pluripotent stem cells?

So, we have this heavily-altered human that can regenerate from stem cells. Let's say that they suffer a "flesh wound" - in this case, let's say an ugly stab wound through the hand with a ...
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3answers
381 views

“Refolding” muscle proteins [closed]

How does this concept check out?. A genetically-altered (i.e. raised from birth) human with muscle proteins that have been developed, "folded" (i.e. the way muscle fibers interact with one ...
6
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4answers
452 views

Could an alien creature with an exoskeleton naturally including lead levels roughly twice as high as iron in human bones get natural RAD protection?

The title is my question. I'm writing a short story and I'm considering have the aliens develop radiation weapons for use against humans and I'm trying to figure out a way that they could be both ...
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6answers
315 views

Realistic travel times for a horse drawn cart in a medieval empire?

So I have a rather large late medieval feudalistic empire that is roughly about the size of South America top to bottom in terms of its radius. Road networks are typically well-maintained between ...
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3answers
172 views

Could my Vampires exist? [closed]

Contrary to popular belief, vampires are not undead humans, but a species of giant hematophagous bats. Some basic characteristic of my vampires include: They mostly consume blood, sometimes human ...
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2answers
523 views

Is a super-Earth with the same gravity as Earth possible?

I'm helping a friend construct a fictional planet for a project, and we've run across a problem. He's looking to create a planet nearly identical to Earth, except only larger. It would need to have ...
3
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1answer
109 views

Planet enabling societies evolving separately and suddenly comming into contact

I'm working on a planet design which makes it feasible for several human-like societies to emerge and evolve separately, up to a point where they are capable to interact with one another directly with ...
4
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4answers
168 views

How to justify the rediversification of tracked cannon armed vehicles

While there are currently many frontline combat vehicles. (MBTs, IFVs, ATGM Carriers, etc.) Out of all of them the MBT (Main Battle Tank) is the only tracked cannon armed vehicle that remains, ...
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8answers
1k views

Dead man switch that would resist a nation-backed offensive

JE is a famous man that has an extensive amount of information incriminating the powerful of this world. He would like to ensure that an "unfortunate accident" does not happen to him by ...
25
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10answers
4k views

Is it possible for the soil of a desertic exoplanet to be so copper rich that its surface is mostly covered in green-blue deserts?

Here on Earth, Mars and most of others if not all terrestrial planets in the universe, iron is their most common metallic element because iron is in general the most common metal in the universe. Here ...
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3answers
217 views

How realistic are my neurons?

I am writing a book about anatomically plausible superhumans ( a new artificially created form of man ), which, in addition to incredible physical strength, should also be distinguished by incredible ...
7
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6answers
580 views

Would this be a plausible way of safeguarding against an AI whilst being conducive to a Cassette Futurism aesthetic?

The bottom line, of this question, is that I'm quite fond of the cassette futurism (WARNING! TV Tropes link) aesthetic, and want at least some of it in my world. I'm reluctant to shoehorn it into my ...
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3answers
188 views

What would a therapist be able to do with the ability to read people's dreams?

My urban fantasy setting has, among other things, succubi and incubi. They have all of the traditional traits you'd expect (wings, the ability to change their appearance, superhuman sex appeal ...
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1answer
147 views

How to hide a continent? [duplicate]

In one of my settings, there is a continent about the size of South America in this general area: It's almost uninhabitable except for the natives and animals, is there a way to conceal this from ...
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2answers
180 views

Could a creature use its tail to move on land?

Here is my humanoid creature. It is just 4'11 while standing on its legs, but I have not figured out how long the tail should be, other than its longer than the entire rest of its body. Most of the ...
6
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8answers
1k views

Setting Relative Coinage Values

Lets say you had a state, technologically around the mid to late classical era, using a hard coinage. There are four types of coins: The smallest coin is a paulum. The second smallest is the radix, ...
2
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5answers
361 views

Plausibility of tank-borne infantry in a world with very short sight ranges and rare, awful radios

This question takes place in the same setting as that of this post (tl;dr: the world is bathed in thick magic fog, the naked eye can't see past a hundred meters, an M4's effective range is 50 meters, ...
3
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1answer
64 views

Can a solar powered biological stationary giant snake exist?

The Moon Jungle is known for its enormous trees with dense vegetation and fauna. However, there is a path where no tree or bush ever dares to block the way of day or moonlight. In this path stands ...
11
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1answer
150 views

Can ferrets substitute for cats as mousers?

House cats are among the oldest domestic animals on Earth. They basically followed domestication of cereals in the Middle East; mice infiltrated human habitation to eat the stored grain, and cats came ...
4
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3answers
194 views

Can my plant produce hormones that cause ultra-violent behavior?

A human without hormones or pheromones could be compared to something more like a plant, tool, or simply a reactionless amalgamation of cells without purpose, fears, and emotions. Such a person wouldn'...
5
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1answer
120 views

How many notes can devils play with their horns?

Everyone knows the trope of horned humanoids with a pointy tail on their back and two horns in their head. ''It's just not a person with a tail and two horns, it's something completely new and inhuman!...
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8answers
540 views

What would be the appearance and color of a deep, pure and vast liquid CO₂ ocean as viewed from space (ignoring the atmosphere's influence)?

So far I had no luck trying to find the visible absorption spectrum of CO₂ anywhere, all I get is the far infrared absorption spectrum and stuff like that. If you just search "what color is ...
3
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3answers
197 views

How would a plant like entity use animals?

The land is covered in structures of green coloring. Some look like igloos and some have veins pulsating and moving slowly with membranes which seem to almost be breathing the way lungs do. Some of ...
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4answers
196 views

growing and farming metals

Is there any biological or environmental factor stopping animals or plants to be farmed for their metal absorbing qualities? Consider we are also counting creatures created through selective breeding, ...
2
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3answers
155 views

Is it possible in the real universe for a planet to develop a thick Octaoxygen atmosphere?

I know how weird this question sounds and how the answer to it is probably NO at first glance, but I don't know enough about octaoxygen and oxygen to be 100% sure about the answer being NO and ...
5
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6answers
1k views

How could a living biological sword survive a spaceship crash and then isolation for millennia?

A sword with a blade made of metal, or the least, it looks metallic, shiny and clean. A sword as old or probably older than our civilization, it has writings on the blade, never seen before, never ...
3
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3answers
735 views

How can an armed group travel to and attack a rival group in another country?

I have a world where the different countries feature various types of organized groups, some are criminal groups (mafia type organizations) and others are non-criminal but they are both armed and ...
2
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1answer
127 views

Cutting off a chunk from the north [closed]

I want to make a map of a completely made-up world; the main issue is the island of the elves. According to their history, a piece of land floated away from the north, and then the "water people&...
8
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2answers
127 views

How would I make an arsenic laden spore deadly?

The creatures on this world tend to favour arsenic as a replacement for phosphorous in their biology. There's an overabundance of it in the ground soil, and very little phosphorus. The equivalent of ...
4
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3answers
215 views

Feasibilty of Chainmail in 12th Century Medieval Settings

This question is inspired by a comment in this video that the official war historian of the Battle of Cresson describing 140 knights attacking an army of 7,000 as "an experience that will turn ...
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7answers
3k views

How to keep a town in the 1960s mostly isolated?

So, the lead up to the story is that a skinwalker drags injured people into the deep forest and nails them to trees before summoning a demon into each of them, leaving them there as parasites who ...
1
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1answer
78 views

faunas of Vivotera part 1: the plausibility of the “Serlano”

so I'm starting a speculative zoology project. It will occur in an alternate earth called Vivotera (from latin of vivus=life and terra=earth), very very similar to our earth except with faunas that ...
5
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6answers
2k views

How can they fight back against an invisible enemy who can alter memories? [closed]

The USA government is at war with some wizards in a broken masquerade scenario. The wizards live among the population, but use magic to make the dwellings invisible. The same magic alters memories of ...
10
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8answers
2k views

Why can gods only incarnate into atrocities? [closed]

When the gods join our presence they are shaped in terrifying ways, the first thing they mention uppon meeting a human are "fear not..." Or "close your eyes,mortals are not strong ...
5
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8answers
2k views

Question about Abortion Survivors and Trauma [closed]

I'm writing a sci-fi novel with some very real scenarios. And this scenario is particularly dark and emotionally charged for a lot of people. If you can read and respond objectively, I'd appreciate it....
2
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1answer
156 views

Could someone survive the post impact earth if they go out of the shelter after a few months?

First of all, sorry if my English is bad. I’m trying to figure out a post-apocalyptic story, so I came up with the so many times recurred asteroid of the size that killed the dinosaurs. Is kind of a ...
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0answers
24 views

Are humanoids capable of breathing in water and on land feasible? [duplicate]

Is it possible to genetically engineer a creature that can breath in air and water? If so, what changes would have to be made assuming the creature was originally a human?
2
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4answers
118 views

Anatomically Correct Dire Bear

Characteristics of the Dire Bear Larger than a normal bear - about ten feet from paws to head whilst on all fours Fur covered in bony protrusions, that act as armour And that's it. Is there a way ...

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