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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3
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3answers
248 views

An alphabet with alternating reading order

I am in the middle of designing a con-lang that features, among other things a letter reading order that alternates by line from left-to-right to right-to-left and back again. My justification for ...
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3answers
112 views

How much deterrence is too much deterrence?

So I have a magic system in which Magic Practitioners cultivate Magic Energy. Grants super strength, regeneration, and the associated powers to make them work. There are nine levels to the system. ...
2
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4answers
134 views

Is it possible to have train but not have guns? [duplicate]

For a setting I'm working on I have an evil empire that I need to be highly connected as opposed to more medieval or earlier states low connectivity. I'm sure Roman roads were great but still we are ...
8
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4answers
2k views

How feasible and capable is a preindustrial land yacht?

This question is based in the desert world described in this question: Can my civilization be totally isolated by deserts? A pre industrial society is adjacent to deserts and mountains to the East and ...
1
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3answers
99 views

Natural continental isolation in the form of a long string of cliffs?

In my worldbuilding there's a planet with a continental population, that was until a certain period of time unknown for the rest of the world. The continent in question is positioned in such a way ...
-2
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1answer
59 views

Is my air pressure system okay? [closed]

Second question here. So in a previous question I got told to make a wind system to determine precipitation, which in turn needs and air pressure system. I've attached two images, the first is when ...
22
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16answers
5k views

How plausible would a self-aware, conscious viral life-form be?

In my story there is a parasitic viral life form which infects multiple species and has the capability to hijack the entire host body as well as communicating with the host. Essential to the story is ...
4
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4answers
477 views

Water wall against naval invasions

Setting: a large sea that can only be accessed through a waterway. The waterway is about 15 by 15 kilometers but blocked off by a giant wall stretching from nearly one side to the other that is about ...
5
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0answers
135 views

Is my topology/are my climate zones alright?

This is my first try at worldbuilding, and I need some feedback. I've filled in what I hope are realistic climate zones, ocean currents and topology for this current state of the world, all done in ...
3
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1answer
56 views

How would the wings of a sphinx or a manticore need to be in order for the creature to fly?

Obviously giving a creature the ability of flight is much more complicated than just sticking wings on any terrestrial animal. The bones and muscles need to be strong enough to lift the large cat-like ...
8
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3answers
380 views

How big would this space station have to be?

Imagine a world very similar to Earth (and about the same distance from its star as we are to our star (it's the planet from my other question). But in another solar system (let's say in Alpha ...
1
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1answer
84 views

Butchering meat from mutant giant rats and lizards?

So, in my world, there was a nuclear apocalypse, which resulted in two new species of animals, radrats (capybara sized brown rats) and geckos (3ft. tall leopard geckos) emerging. About a generation ...
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3answers
100 views

How would mammals in this world evolve to deal with this problem related to sweating?

My world is extremely acidic. Upon contact with liquid water, the acid forms and can lead to several problems that the natives have to face. One of these problems is that the farther from the extremes ...
3
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5answers
450 views

Can my civilization be totally isolated by deserts?

Is it possible for a dry planet similar to Earth* to be inhabited by an indigenous intelligent humanoid species that is restricted to a small area of the planet – perhaps 1000 miles x 1000 miles near ...
3
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2answers
71 views

Decomposers produce acid and depend on (liquid) water to perform their function. Is this world coherent?

About my idea: The decomposers of this world perform the degradation by producing and diluting acid in liquid water molecules. In this world, most decomposers are present in the seas and oceans. ...
6
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4answers
207 views

How dangerous are these density gloves, and other than punching people what are their uses?

In my fictional story I am playing with the idea of a sort of density gloves that can change density while keeping volume the same. Obviously you can punch people with diamond hard gloves with these ...
5
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4answers
108 views

Can facial Nerve damage cause all facial functions to shut down (temporarily)?

So I'm writing a character that cut his face very deep making a big x mark on his face at some point in the past to scare off a couple of thugs. He survived the ordeal, but now it so happens that ...
8
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4answers
467 views

Is my idea of Wyverns realistic?

I am an aspiring fantasy writer, and I wanted to include rideable Wyverns in my world. There will be a magic system in my world, but I still want to make them as scientifically possible as I can. Now, ...
9
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4answers
1k views

Could cats sustain themselves in caves?

An odd question, yes, but a question I am asking anyway. I have a group of feral cats that lives in a cave system. They've lived down here for generations, and survival of the fittest weeded out the ...
3
votes
2answers
122 views

Biologically classifying a gene-spliced creature?

In my world, new wildlife and creatures have emerged due to the presence of radiation, genetic engineering, and have lead to new mutants and dangerous beasts stalking the Wastelands. A scientist in my ...
11
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23answers
5k views

What would cause a heavy military or civil presence on an island with no strategic value?

Let’s say I have an island, similar to the likes of Kerguel in the Indian Ocean, as the island is hundreds of miles away from any mainland, has no immediate resources, a tiny population and no ...
2
votes
1answer
111 views

What would Martian Life be like? [closed]

Basically what I'm asking is how would hypothetical life be able to survive on Mars? Would they need to be created from scratch in some effort to make life on seemingly uninhabitable worlds or ...
2
votes
3answers
238 views

How can giants be incorporated as foot soldiers into a traditional army?

In the hellenistic period, giants are considered gifts and blessings from the Gods, and are honored as minor deities by the culture that they are born into. They measure between 10 - 12ft tall, and ...
28
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25answers
5k views

Why wouldn't magically gifted individuals be forcibly conscripted?

Ok, so this late-medieval fantasy setting in question has magic that isn't available to everyone. A small percentage of the population is magically gifted, and only they can cast spells without the ...
3
votes
1answer
86 views

Strength/muscle mass limit for a human based creature?

So, in my world, I have a species of human-based mutant creatures called "Screamers". Genetically modified Homo Sapiens, these Screamers are one of the most dangerous beasts in the Wasteland....
2
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6answers
506 views

In this universe with these technologies would HUMAN infantry still be useful for the military?

In my previous question about galactic empires the subject of human infantry was not the main focus so it was not discussed properly. And so I think it needs to be covered as I'm really trying to ...
2
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1answer
119 views

Two Interstellar Vessels, passing each other at a fraction of Lightspeed, how would that look? [closed]

so suppose you have two vessels in Interstellar space. One is the ITV Europa while the other one listens to the name ITV Lea Sudux. Europa is flying at 0.5c, so 149896km/s where as the Sudux chills at ...
2
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4answers
237 views

Supplies necessary for subterranean survivors to adapt to the apocalyptic surface?

In my world, there was a brutal nuclear war, killing off a large, large amount of humanity. While the (former) working-class and blue-collar survivors spent a century fighting and scavenging in an ...
3
votes
6answers
1k views

Can a person use plants instead of blood, and what would the consequences of this be? [duplicate]

I have been brainstorming an idea for a kind of human-plant symbiosis, in which a plant has either evolved or been modified to photosynthesize with heat instead of light. This plant may have evolved ...
-4
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2answers
115 views

Does infinite energy being spread evenly amongst infinite volume result in overheating? [closed]

I have an infinite black void. Due to the fact that it is infinite, no matter how much finite energy I dump into it, heat will not continue to accumulate as it is an infinite amount of volume and it ...
2
votes
0answers
66 views

Could there be a humanoid species with blue or multicolored hair? [duplicate]

So i was wondering why dogs and cats for example have a way bigger color variety than humans have when it comes to hair color. Why are dogs and cats so often multicolored, with spots or stripes, while ...
-5
votes
7answers
386 views

Biochemical plausibility of blue(-gray) fur?

I want some critters to have gray-blue fur (specifically, colors like Alice blue, cadet gray and marengo). I know there are blue schemochromes, but I'd prefer getting there by absorption rather than ...
8
votes
1answer
219 views

Is it plausible for my dragon to shoot fire from its rear?

My dragon is not large in size (around the size of a house cat), flightless, and doesn't shoot fire from its mouth, much like in popular culture, but it shoots from its rear. I think it's much safer ...
8
votes
3answers
2k views

Is sapience enough to rise above natural bodily instincts?

Ok, I've been racking my mind on this a while, and I think it might be able to, but I was wanting to get some more viewpoints on this. You see, a couple of my stories involve sapient animals and ...
13
votes
8answers
3k views

Maintaining realism while having giant insects?

In my world, there was a nuclear apocalypse, and the resulting radiation, along with biochemical pathogens, lead to a dramatic increase in mutation and evolution. Now, originally in my world I wanted ...
7
votes
2answers
149 views

Gardening in an Alien Biosphere

Take a world with the same physical characteristics as Earth, but where biochemical development has "rolled the dice" differently in some cases. The simple chemistry are the same compounds ...
2
votes
1answer
61 views

Enhanced Brain Function Due In Utero Drug/Steroid Exposure

Would it be possible to enhance brain function by exposing a person in utero to a given set of drugs? Assumptions: Enhanced brain function: Increased intelligence, Increased memory, etc. At a minimum ...
1
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0answers
35 views

What would the effects of simultaneous heating of the human body be? [closed]

Though this has to deal with a magic system, the 'magic' part isn't relevant. Suppose, due to the magic, the human body heats up at a rate of x watts, for a total of T kilo-joules, what would the ...
7
votes
4answers
185 views

How would a sole superhero on Earth seek therapy?

Imagine you've suddenly awakened to immense powers. But this isn't the Marvel universe, so you're the only human with these abilities. For the purpose of the question let's say these abilities are ...
3
votes
2answers
119 views

How would food not spoiling affect society? [closed]

So in my setting, certain kinds of food do not spoil. To be precise: microbial spoiling is not a thing. Food still spoils due to chemical reactions(eg rancidity in oils and fats). So in what ways ...
6
votes
1answer
167 views

Could a 3+1 dimensional universe have a spacetime curvature that never reduces to Newtonian Gravity?

I was thinking of a universe with 3+1 dimensions, in which the spacetime near a massive body is curved. If this universe was empty of energy and matter then the spacetime geometry would reduce to ...
1
vote
1answer
36 views

Animals, plants, and sleep cycles on a moon with a very long day-night cycle [closed]

Let’s say that this moon is about the size of Earth. Let’s say that our moon has a very long day-night cycle; about an Earth year. During night, would all plantlife die because of the lack of light? ...
13
votes
6answers
4k views

A solar system where a planet is in the center?

Is a solar system where the center is a planet possible? Where would the heat on it and its moons come from? Would life of any kind even be possible? Would everything be pitch-black, or would some ...
5
votes
3answers
146 views

Is a genetically enhanced wolf-based creature realistic?

I had an idea for a creature in my world: the enchanced canine. Basically, they were dogs, mostly German shepherds, that were used by a police organization in the United States. These policemen, ...
7
votes
7answers
1k views

How to artificially accelerate biological evolution of species?

My post-apocalyptic world is to be populated by new creatures such as Giant Geckos, Trihorns, and super-strong giant humans. The setting is a few centuries after World War III takes place, so new ...
7
votes
1answer
192 views

Atmospheric conditions in massive tunnel

Context is an alternate reality where at some point in time, one large tunnel appears on Earth. Both ends of this tunnel are 100m above sea level, respectively located at most eastern equatorial point ...
2
votes
3answers
239 views

Is it Possible to Have Snow-Capped Mountains Directly on a Tropical Beach? [duplicate]

In my world, there is an archipelago that is home to the Coorabar Alps, the highest mountain range in the entire known galaxy (quite a few peaks here surpass 30,000 feet, and they form a plateau on ...
2
votes
1answer
117 views

In This Comparison, Are the Continents Moving Too Quickly?

This is a map of one of my alternate Earths from 233 million years ago in comparison to a map of our Earth today: And this is a map of the same alternate Earth, this time from 100 million years ago, ...
4
votes
4answers
224 views

A world with extremely limited fossil fuels

So this is a slight revision of my earlier idea, of a world that entirely lacks fossil fuels. So basically the big idea I'm interested in is an industrial revolution that fully goes through with the ...
5
votes
2answers
267 views

Is it possible for this creature to evolve?

In my world, I wanted to have a specific type of creature (a human based one) who are called the Sealed. Basically, the Sealed were forced to go underground into a large cavern after WWIII’s aftermath,...

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