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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Self-propagating radiation that turns humans into walking radio towers that are part of a 'collective unconscious'; feasible, or no?

A little background... I have a story idea revolving around "Agent ROY-G-BIV" (the name is a reference to the 7 colors of the rainbow), a self-propagating form of electromagnetic radiation ...
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5 votes
9 answers
2k views

Helmet that shoots lasers?

I have a character who wears a high-tech helmet with a high-powered laser mounted on it. Basically, the wearer “stares” at a stationary victim, and the laser is activated. The laser would take a short ...
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14 votes
10 answers
7k views

What would be the cost of living in a country where only millionaires and billionaires are allowed to live?

I am imagining a small country with a relatively small population; say around five million people, where by law everyone living there needs to be a millionaire or a multimillionaire/billionaire. So ...
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3 votes
6 answers
189 views

Can the actions of another entity remain truly inscrutable?

Inscrutable Impossible to understand or interpret. Here on Worldbuilding SE, I see quite a few questions and more answers that mention the inscrutability of the actions of intelligent non-human ...
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2 votes
1 answer
101 views

plausibility check : this kind of mushroom [closed]

context : in this world with small gravity and strong wind, airbone plants thrive. this planet too have thick clouds covering so underneath it is almost dark or rainy. the thriveness of airbone ...
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  • 1,658
-3 votes
2 answers
174 views

Possible population levels in a Kardashev Type 2 Scale civilization

Acording to Futuretimeline a type 2 Kardashev society could be achieved around the year 3100 when science is advanced enough to allow the creation of a Dyson Sphere and due to its size it could house ...
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4 votes
6 answers
2k views

Why would a language created by humans lack both the /s/ and the /z/ consonants? [closed]

In my story, there are a strange species from the Homo genus: hematophagous humans often called vampires (their scientific name is Homo haematophagus) (so, they are still humans, just not Homo sapiens)...
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5 votes
6 answers
3k views

How Can I Justify the Existence of Dragons in My Realistic Post-Apocalypse Fantasy Setting? [closed]

Recently I have given myself an interesting challenge: To create an interesting fantasy world that does not have conventional "magic." In this setting I'm writing, our entire civilization ...
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12 votes
9 answers
871 views

Could the movement of animals and plants be used by a future civilization to figure out that it isn't the first civilization?

I noticed that when it comes to the idea of humans going extinct, and how human civilization could be detected by future civilizations, a lot of the ideas for how human civilization could be detected ...
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-4 votes
2 answers
277 views

Origins of the Feudal Lords of America?

I have a political science problem in my story. I reduced this to a simple binary choice to prevent opinions, abiding by the perfect question checklist. If this question is confusing, I am on chat ...
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26 votes
18 answers
6k views

In a cyberpunk world where corporate upper class citizens can work virtually through implants, why would they build corporate mega-skyscrapers?

In my story, the upper class have augmented reality chips in their brains. What would be the point of physically going to work? Why would a corporation have incredible cyberpunk-style mega-skyscrapers ...
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1 vote
0 answers
88 views

A genetic disease that makes humans have much more brown fat than the average human being

I wonder if the disease I invented is realistic or a total fiction. In my story The Transcendence of Adolescence, there is a 17 years old homosexual (or lesbian if you want) transgender woman named ...
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3 votes
2 answers
117 views

Is a universal land and launch spacecraft theoretically possible?

Nearly every science fiction story features a craft which lands on a planet, allows egress to the surface, and then leaves the planet. Logistics is almost never a part of the story. In considering ...
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1 vote
4 answers
193 views

How realistic would for Canada to become richer and wealthier than the United States because of climate change and global warming?

I believe that global warming could make Canada one of the most fertile land areas for agriculture and one of the countries with the most stable climates. So would be realistic that climate change ...
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2 votes
1 answer
80 views

Feasibility of this population of surviving dinosaurs

We assume the following for this scenario: There is a kind of surviving non-avian dinosaur. They live primarily in Congo Basin. They evolved from a smaller, omnivorous kind. They fill multiple niches ...
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  • 1,658
9 votes
4 answers
1k views

What will exactly happen if a small amount of iron from the sun's core were teleported to the Earth's surface?

It is obvious that the surrounding area will become extremely hot, but I want to know other consequences if enough iron to make a sword were to be teleported to earth. Would it be possible to make a ...
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4 votes
1 answer
385 views

A genetic disease that makes humans unable to produce adrenaline

I wonder if the disease I invented is realistic or a total fiction. In a white drama/lighthearted tragedy (the opposite of black comedy/dark humour) web-series for a teen audience in mind I want to ...
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2 votes
2 answers
136 views

Would an O'Neill Colony in earth orbit need to rotate around an axis parallel to the Earth to keep people from feeling major weight changes?

I calculated that if an O'Neill cylinder were allowed to rotate around an axis that pointed away from Earth (or anywhere in a plane that is perpendicular to Earth) that the variation in experienced ...
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15 votes
4 answers
1k views

Using a Musical Instrument to Repel Wildlife

I have a setting where a nomadic man lives alone in a forest. Presume the wildlife is similar to a typical subtropical or temperate forest. I had the idea that before he sits down to cook, he would ...
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6 votes
5 answers
183 views

Fantasy world of seven Realms based on the rainbow

I invented a fantasy world which primarily consists of 7 Realms, six based on the six colors of the rainbow (the consensus is that indigo isn't really a color), red yellow green blue orange violet, ...
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-2 votes
1 answer
90 views

Can a button cell battery power car cigarette lighter (in the shape of a ring)?

Is it possible to make a fake golden ring which can light a candle on the push of a button and power it with button cell battery (either coin cell or watch button size)? I have a fraud guy trying to ...
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3 votes
5 answers
246 views

Does an Undead Kingdom where the Lower Class live near the surface while the Upper Class lives underground below them make any sense?

I'm working on a story where all the characters are various Undead (we're talking typical D&D Ghosts, Wraiths, Zombies, and Skeletons, albeit with sentience) that all live together in the highly ...
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  • 1,177
7 votes
2 answers
83 views

Realistic Intake Food Required To Maintain Healing Factor

So, to start out with. I've got a character with an alien biology and has an accelerated healing factor. Nowhere near the likes of Wolverine, or Deadpool but better than a regular Humans and allows ...
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15 votes
8 answers
4k views

How would a secret tunnel be kept entirely secret?

The world this is set in is located in a valley and doesn't allow anyone to leave. They are very strict about this so there are many watchtowers along the top of the valley sides, and soldiers ...
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  • 497
4 votes
4 answers
443 views

Reality Check: Are these aliens feasible?

I'm working on a Space Opera novel featuring a group of aliens that call themselves Species 0001. Here's what you need to know about them: They are a species of squid-like aliens that evolved on a ...
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  • 1,177
4 votes
1 answer
54 views

Day/night cycle and tracking celestial positions in S-type binary star system

I know this has been asked before but I'm going to pose the question again under slightly different circumstances and with a more specific goal. I'm trying to work out the details of how the day/night ...
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15 votes
6 answers
3k views

Are jumping ships feasible? (Not jump drives, but ships that jump)

As mentioned above this is not about jump drives, this is about ships that physically jump. Writing science fiction, trying not to handwave too much, so I want to check if this is a feasible tech. ...
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2 votes
4 answers
115 views

XO of a naval cruiser leads an internal investigation

In a future space navy setup, a Long Duration Mission cruiser experiences a mysterious death while in deep space. A member of the crew mysteriously dies while at their station and causes a series of ...
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  • 885
4 votes
7 answers
2k views

XO Commanding a cruiser

My universe uses a lot of parallels to modern and World War Era navies. With that, I am trying to make a plausible space navy operating several centuries from now. The particular ship for this ...
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  • 885
3 votes
1 answer
116 views

Two planets - "exchange orbit" scenario - Does it cause earthquakes?

I have an earth-like planet with a roughly earth-like orbital period, that is in a stable co-orbital scenario with another largish body. Similar to Janus and Epimetheus but planets rather than moons. ...
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  • 131
14 votes
2 answers
985 views

Feasibility of an "albino" in a species that has color-changing capabilities?

I have an alien I am designing and I want there to be an individual to be a play off of my main character (who is albino.) The aliens are, unknown to the human settlers, an enigmatically intelligent ...
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  • 657
2 votes
2 answers
175 views

Could a molecular cloud turn the Sun into a killer star?

Let's say an unknown cloud enters the Solar System and begins manipulating the Sun, destabilizing the magnetic fields. Could it end up causing the Sun to emit gamma ray bursts to render the system ...
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  • 1,168
6 votes
2 answers
283 views

What would my phylogenetic tree composed of sixteen Homo species look like?

In my world, there are sixteen human species (mammalian species from the Homo genus): Anatomically modern humans (no explanation is necessary); Marine humans/Merfolk (they have a seal-like blubber, ...
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5 votes
2 answers
137 views

Why would a language have three rhotic phonemes?

In my world, there is a mammalian species from the Homo genus called "ogres" (their scientific name is Homo obesus) (they are still humans, just not Homo sapiens) (Homo obesus means "...
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7 votes
1 answer
111 views

Figuring out the precise location of Earth a certain amount of time ago

Movement is relative, but I've read that an ex-NASA scientist has quantified the speed of Earth hurtling through space to be 1.3 million mph, using the Cosmic Microwave Background as a frame of ...
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3 votes
2 answers
102 views

Does anything exist to serve as tissues for my organolithium biology?

The key concept of my storybook world is vast and sweeping incompatibility with all things terrestrial. But that is only the backdrop, it is not my question (before we head out on too many tangents). ...
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  • 5,864
4 votes
4 answers
405 views

How does a whistle language written with latin script work?

so for context this kind of alien possess no vocal cord to make sound like human had instead, they communicate by making sounds akin to whistle,chirp,and clicks. this kind has no native writing ...
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  • 1,658
4 votes
1 answer
163 views

Are heated roads feasible? [closed]

In the 22nd century fusion energy is as cheap as dirt. A populist politician proposes building of heated roads that will automatically melt all snow and ice during winter. What are the drawbacks of ...
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9 votes
6 answers
878 views

A variable-ammo post-apocalyptic projectile-weapon

Needlessly long names aside, how would this weapon work? Made from scratch with junk scavenged from a 21st century world, post nuclear apocalypse. Assume nothing was specifically preserved, only the ...
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  • 373
12 votes
4 answers
876 views

Plausibility check : a planet with tropical poles

is this planet plausible? the planet is the third planet from its star. by size smaller than Earth. the planet has no moons. the only habitable areas are rings around the poles. in the pole, there's ...
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  • 1,658
6 votes
3 answers
191 views

how plausible is this exomoon?

(this is doublet of my previous question, so I did a little improvement on it) -my exomoon is around size of venus, but a little bit smaller. is very windy, so windy in fact filter feeders thrives in ...
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  • 1,658
10 votes
4 answers
2k views

Why would a language created by humans lack the /j/ semivowel and even the /i/ vowel?

What I mean is the /j/ sound (as in English "yellow" and French hyène) (hyène means hyena) is the most common semivowel around the world. This phoneme is highly conserved in Indo-European ...
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3 votes
3 answers
158 views

Plausibility check : an habitable exomoon

Is this moon plausible this moon is a little bit smaller than our moon it has thick atmosphere. so much so that floating algae thrive in the wind. the moon is not too close to its planet nor it's ...
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  • 1,658
8 votes
10 answers
3k views

Could my Anti-Regeneration spear technology work against this creature?

My story (set in the far future) has a bear-sized monster with a tough shell. The human settlers fighting it realize their ballistic firearms are not effective in killing it; though they may pierce ...
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  • 1,340
5 votes
2 answers
127 views

What preparations are needed for putting a scientific explorer base on another planet?

In my book, a group of scientific explorers want to put a base on the planet so what would I need to make that possible? The planet is a super-Earth but has lower gravity than Earth. The ship they use ...
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26 votes
10 answers
5k views

Can a habitable world rain glass?

Requirements: There is a solid surface. Somewhere on the surface, the temperature exceeds 2,230 C, such that pure silica vaporizes. Elsewhere on the surface, the temperature is at most 25 C, such ...
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2 votes
4 answers
174 views

How would an entire static city that floats on the water be designed? [duplicate]

I'm writing a sci-fi story which includes what I'm naming "buoyant cities". They're cities that can house about 150,000 people, with fully functioning electricity, plumbing, waste management,...
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5 votes
4 answers
633 views

How to design a realistic school with coed rooms?

I am trying to design a "progressive", every high schooler's dream high school/boarding school where grades 9-12 attend (but could make it just the more senior years if that would work ...
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  • 522
7 votes
3 answers
389 views

Advanced Soldiers using Echolocation/Sonar?

My story takes place on a dark, dusty planet full of canyons and tunnels. The atmosphere is compositionally similar to Earth’s, but it is too dark and cloudy for humans to see properly. The humans ...
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  • 1,340
3 votes
3 answers
242 views

Replacing heavy cranes with airships for alien city building? Pros/cons?

We are doing construction on an alien world with unbreathable air This creates a very big problem for a growing city which needs to expand. Workers cannot go outside safely for long periods. Goal: ...
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