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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Tungsten carbide sword: Will it work? [duplicate]

Ever since steel was created, it has been the go to material for swords since antiquity and into the modern era (for actual replicas and not wall hangers). Of course while being effective it is also, ...
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3 votes
3 answers
165 views

What is the realism level of never needing to defecate? [duplicate]

So I was thinking about making a 'artificial', 6 inch tall, humanoid creature that not only never really makes feces/urine, but is able to pretty much eat grass(or any other plants humans cannot ...
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4 votes
7 answers
549 views

Can you create an implant that detects a person's thoughts and feelings?

Is it possible to put, on a mentally ill person, a surveillance implant that detects said person's emotions and thoughts? This 'chip', 'implant' or other monitoring machine should be able to monitor ...
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2 votes
2 answers
141 views

Could a coalition of powerful corporations protect itself from a hostile neighbour?

This is an alternative Earth-like world, which has just entered the rough equivalent of Cold War. The primary contenders are the large quasi-socialist country with a strong command economy, opposed by ...
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6 votes
4 answers
155 views

What would cause this specific method of reproduction to become prevalent?

I have a class of animals in my world that have a bit of an unusual method of reproduction. Members of this class produce pod-like eggs. These pods are buried in the ground to incubate until the first ...
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  • 2,141
8 votes
9 answers
1k views

Could Short-Range Fighters Realistically Return?

I am shooting for a futuristic image of fighter warfare (similar to the depiction in Star Wars). As jets and long-ranged targeting have developed, aerial “turn-fighting” and short-range dogfights ...
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  • 1,280
4 votes
1 answer
67 views

Seasonal Weather in a Forest with Polar Night

I'm investigating the feasibility of a world where there are taiga forests located far enough north to experience a significant polar night, say, no civil twilight for at least a few months. Inside ...
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3 votes
5 answers
1k views

What would be a realistic length of minimal compulsory military service for a modern country's occupants?

I have a world in which several neighboring countries are in an ongoing long term military conflict. The style of conflict fluctuates between a cold war USSR vs US, current North vs South Korea and ...
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  • 522
3 votes
1 answer
85 views

Is radiation from collisions with interstellar material a serious threat to occupants on a system sized ringworld?

I want to know if living on a ring-world with an outer velocity of 1200km/s would be survivable by humans or would you get baked from the constant collisions with stray hydrogen and space dust? I'm ...
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1 vote
1 answer
160 views

Could möbius ring shaped devices deflect or possibly redirect bullets?

As a rule, my sci-fi has no force fields. This is interesting, because every type of shielding that would normally have no mass are restricted to be physical devices. The most notable I'm working on ...
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9 votes
6 answers
2k views

Can a supersized collection of tethered large space structures exist?

I wanted to create a main destination/headquarters for each galaxy in my story but a single planet or megastructure didn't seem grand enough. My idea is to have a vast number of structures from ...
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3 votes
1 answer
118 views

Would this be able to glide?

On my planet there is a fish that acts as a pollinator. It has 2 fins, one on each side. When it jumps from the water both it’s fins spilt into two revealing a web of skin. The reason it does this ...
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7 votes
2 answers
160 views

Verifying Habitability/ Feasibility of my Conworld

Right, lets try this again. I'm making a planet for a book I'm writing. I want to know if the planet I outline here is scientifically probable, able to support life, and what the climate would ...
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5 votes
6 answers
499 views

How to Make the Two Stars of a Circumbinary System Look like One

For context: say I have a planet in a P-type orbit around a pair of binary stars. One's a K-type and the other is a red dwarf (M-type). I want it to be such that, planet-side, it looks as if there is ...
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0 votes
3 answers
117 views

To what extent is mass required for electricity and memory retention?

I'm sorry if this this question doesn't meet the complexity standards, but my understanding of electricity is rather basic. Here goes! Memories are stored through rapidly firing neurons, but to what ...
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2 votes
2 answers
93 views

civil and industrial applications of large amount of linear force?

What are some civilian or industrial applications of a large amount of linear force. I.e. if a magical symbol was inscribed on a piece of paper the next physical object that touches the symbol would ...
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  • 411
8 votes
4 answers
870 views

Hand-to-Hand Combat with Exoskeletons

My story has generally humanoid, human-sized creatures with insect-like exoskeletons. Assuming their joints and bone structure work as closely as possible to their internal-skeleton counterparts (and ...
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  • 1,280
5 votes
1 answer
101 views

How would this atmosphere change the way weather works and therefor biomes

Is it possible to have a mostly jungle and swamp like planet with these characteristics: The planet is a mostly water with high amounts of oxygen much like the Carboniferous period on earth. 2 suns ...
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0 votes
1 answer
107 views

Monetary system(or the abscense of it) in an economy where AI and robots have eliminated most jobs [closed]

Where the mejority economic socaity robot have the cloused and personal car 30 ton e.g. tracking
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6 votes
2 answers
125 views

Aliens Using Both L and R-Amino Acids or Sugars - are they possible?

It's fairly common to see discussion of different chirality for amino acids and sugars whenever people ask for advice on plausible alien designs or biochemistry (e.g.: metabolizing left-handed sugars ...
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2 votes
3 answers
248 views

On a world that is ravaged by Carrington Events, is there any way for the inhabitants to develop electricity?

Inspired by the question On an Earth regularly ravaged by solar storms as strong as as the Carrington Event, how would technology advance? On a world that is ravaged by monthly Carrington Events, it ...
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14 votes
4 answers
3k views

How can an ocean of sea water behave like honey without changing the chemistry?

I am imagining a world where liquid water can exist outside our solar system and share a similar chemistry with our ocean, say there is traces of sodium chloride in water (not the heavy water kind). I'...
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3 votes
1 answer
93 views

Giant realistic Prototaxites like fungi in a hot climate

My planet is very similar to earth around 359 to 299 million years ago. years ago. It’s mostly covered in deserts, jungles, swamps, temperate forests, and their variants. (The Carboniferous period The ...
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22 votes
4 answers
6k views

Why would Dune sand worms, or their like, be attracted to even the smallest movement?

The sand worms in Dune are gigantic creatures. Confirmed sizes reach up to 450 meters long. And in the wiki it says "Some people believe that worms from 700 to even 1000 meters existed in the ...
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6 votes
1 answer
157 views

(TW: Strangling) Would this character actually have any difficulty breathing?

((Alright, so! I don't even know if this is the right place to ask, but I hope to hear your thoughts. Sorry for the morbid topic and thanks in advance!)) In a comic I'll eventually draw, there's this ...
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4 votes
2 answers
127 views

Thunderstruck and tesla beetles: Are they feasible?

I my game project, "The Von Neumann Project," you play as an android attempting to colonize a hostile alien world, and turn it into into a thriving factory planet. One of the many odd and ...
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2 votes
2 answers
155 views

Sprinting Downforce on Titan

Since Titan has high air pressure, but low gravity, could settlers there wear wings or other methods of downforce (passive or active) on their suits/clothes to keep themselves grounded while they run? ...
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  • 1,280
3 votes
5 answers
559 views

How would a rebel group best utilise ww2 era planes/equipment against a modern state/dictatorship? [closed]

For context: Modern United States, UK and several other countries have been taken over by a totalitarian dictatorship plotting to revive a Lovecraftian god(This happens later, does not affect this ...
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3 votes
4 answers
146 views

What would make a species of sentient starfish rationally and ethically choose between sexual and asexual reproduction? [closed]

Starfishs or seastars have sexes( they are either male or female) but they can reproduce both sexually and asexually. The latter is possible using fission or fragmentation. In this planet there is a ...
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6 votes
4 answers
153 views

Flash Flooding on Titan?

From what I’ve researched, Saturn’s moon Titan is believed to have a methane cycle throughout its seasons. Particularly, during the winter season, methane rain falls, filling Titan’s lakes and rivers. ...
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  • 1,280
2 votes
4 answers
760 views

Realistic combat AI [closed]

The idea of combat robots is simple, they are robotic soldiers that don't eat, don't sleep and don't rest, but they never touch the issue of the AI they employ. The AI of a combat robot must meet the ...
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0 votes
1 answer
109 views

Anatomically correct amphisbaena

Amphisbaena is a creature from greek mythology. It is a snake, with another head at the end of its tail. I have a world in which I'm adapting various dragons to be scientifically viable. I've already ...
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3 votes
1 answer
49 views

Can a creature who uses anguilliform swimming swim in an up and down motion like cetaceans?

I am working on a xenobiology biosphere project, and I have a clade of creatures who evolved in the wetlands. They are disconnected entirely from life on our world, although they follow the same ...
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7 votes
1 answer
549 views

Can a hydraulic system also serve as a battery?

Hydraulics commonly use mineral oil or water to provide the pressure needed for mechanical movement, which is good but the liquid just sorta sits there not doing anything else. So I though “why not ...
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4 votes
1 answer
186 views

Weather for a dense-atmosphere water world

In this answer, I describe a low-density water world with a surface gravity of 1g and a surface atmospheric pressure of 20 ATM. The air temperature at the 1 ATM altitude (naively, assuming a ...
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4 votes
3 answers
222 views

Would merfolk kept in captivity suffer from lack of oxygen?

In my story, in the midst of a human-merfolk war, merfolk are captured by humans, and are periodically de-scaled (they grow back) to sell their colorful scales as jewelry. In these farms, the merfolk ...
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  • 2,441
0 votes
4 answers
162 views

Everyday life in a country/society where intentional homicide is not a crime [closed]

In this hypothetical society, intentional Homicide (murder) is not a crime but society can develop normally and people carry out normal lives. I believe this could be possible because I read that ...
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4 votes
5 answers
1k views

Evolutionary pressures for carnivorous elves

In a fantasy world I am creating, there exists a race of elf-like hominids that exist along side other races in this world. Note the "elf-like" portion as while they do have: Pointy ears (...
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  • 3,209
4 votes
1 answer
118 views

Design of a scythe bicycle?

In ancient times, scythe chariots were all the rage. Sporting meter-long blades, they were a terror for primitive warriors. I presume that means that, unlike in bad Hollywood movies, the scythes ...
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  • 18.5k
0 votes
5 answers
191 views

Is it realistic and legal for someone who lives remotely in the UK to have a private mobile repeater?

Edit: Question has been edited due to confusion and details have been clarified on why they need a mobile signal. I'm currently writing a short story and have the idea that someone that lives in a ...
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2 votes
2 answers
115 views

Interstellar Space Travel via Time Travel

Building upon the questions from @States Time travel from stationary position? and @Travis Time travel from stationary position?, would it be possible to travel to other star systems within our galaxy ...
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2 votes
2 answers
100 views

Brain-Controlling Bacteria

As a Star Trek fan, I’ve been fascinated about the concept of the Borg and how they have used nanotechnology to assimilate every valuable species. They not only incorporate their technology into their ...
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  • 677
3 votes
3 answers
85 views

Could the differences between day and night on this desert planet allow for strictly nocturnal condensation?

Here's the basic gist of this (debatably) habitable Earth-like desert planet: Size: Same as Earth Rotation: 30 hours (three extra hours of daylight followed by three extra hours of night) Revolution:...
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  • 14.4k
0 votes
1 answer
128 views

Implanted device in human body that can transmit over long distance

Previously linked question (which is closed but already has answers). Say we have a type of implanted device in human body (say, ear) used to communicate over a distance. I am thinking about a ...
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  • 87
6 votes
4 answers
507 views

Moon hit strong enough to put it in a slow spin?

I’m building a world nearly equal to earth; i need a catastrophic event that make the moon start spinning breaking the tidal lock, a really slow spin, like 500 years for a full spin. i thought about a ...
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3 votes
1 answer
65 views

Could vulcanic activities make polar regions more inhabitable?

My basic idea is a polar region in a planet that, for whatever* reason, has a obscene amount of geothermic activity. The question is, will this be enough to create a micro-climate large enough to ...
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  • 2,140
4 votes
2 answers
230 views

Collect powers from human body via miniature implantation

How much energy can we draw from miniature implanted device that collects energy from human body? The goal is to design a type of implanted device in human body used to communicate over a distance, ...
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  • 87
2 votes
1 answer
128 views

Could a supervolcanic eruption in the Phlegraean Fields be triggered by detonating a 1-gigaton nuclear bomb and then fracking the resultant salt dome?

So. There's a group of nutcases in my setting; they are an ages-old, all-powerful secret society, yadda yadda yadda, control massive amounts of the world behind the scenes, have agents everywhere of ...
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  • 9,596
7 votes
4 answers
3k views

How far should a 160 pound android be able to jump vertically and horizontally if they are 12.5 times as strong(can lift 1 ton) as an average human?

So I have this android character that has super-human abilities. I like her durability level, speed, and everything else, but I feel her jump is a bit to short. She can lift around 12 1/2 times, or 2,...
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-3 votes
1 answer
135 views

My alloy plausibility

My armour is able to take temperatures upto 500°c and tensile strength of 17 MPa . It is made with some knowledge of physics and material science. My suit is made of mono-crystalline iron and coated ...
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