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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.

8
votes
4answers
533 views

Feasibility of deceleration by collision

There are many hypothetical systems for bringing spacecraft of the near-future up to speed, some of which may attain some relativity-bending velocities. However, these systems, to achieve such high ...
15
votes
7answers
2k views

Would ground-based vehicles become obsolete in the age of space combat?

I'd think the future combat of planetary invasion (as in conquering, not destroying) would use space fighters/gunships with infantry for CQC support. Realistically, in a universe where interstellar ...
2
votes
2answers
104 views

How would an exiled ruler take back their throne and re-establish reign? [closed]

In the story I'm plotting, the ruling monarch is overthrown and imprisoned on the basis of colluding with an invading force that's already encroaching the country's boarders. There are letters to ...
-1
votes
3answers
135 views

Storing people in space

In the future, personal Cryonics (in the hope of cure or immortality on re-awakening)) have become enormously popular. However there is a storage problem. There just isn't enough space for all the ...
7
votes
4answers
214 views

Natural uncovering of desert ruins

My world has a semi-nomadic people that inhabit a vast sandy desert. Underneath this desert lie the ruins of an enormous metropolis -- a city that was abandoned tens of thousands of years ago. In the ...
1
vote
0answers
67 views

If a civilization lands on a new planet and comes into contact with native tribes, how would their language change over time? [closed]

So around 13,000 years ago, a group of refugees from a planet with Greco-Roman culture and technology were kicked off of their planet by what were essentially space vikings (space travel is done via ...
0
votes
7answers
254 views

How deep can an ordinary human completely bury themselves armed only with a shovel?

In my society, honour is all important. A condemned criminal can recover his or her family's honour by burying themselves alive as a form of suicide. My question is: How deep can an ordinary human be ...
4
votes
3answers
314 views

Egypt and Israel. Would ever ally with each other?

So in my settings set 40 years in the future I plan to have Egypt and Israel in an alliance that sees them slowly (and I mean slowly) merge into a single nation. Now my question is if this can happen ...
14
votes
16answers
6k views

Selling food to the enemy

The castle is under siege. The inhabitants are running out of food but have plenty of gold. The attackers have food supplies but need money to keep them coming. Does it make sense for the attackers ...
10
votes
3answers
244 views

How long would it take people to realise some rabbits are sapient?

Set in modern day, a small warren of rabbits randomly achieve sapience in an unremarkable, rural countryside. These rabbits become capable of thinking and self-reflection, as well as advanced ...
5
votes
6answers
159 views

Does a large population make sense in a galactic society with automation tech?

So I am writing a Sci-Fi novel where humans are currently spread out over 440 Star systems ( ~ 2000 Light years). There has been several breakthroughs in Automation technology and all manual labor ...
19
votes
12answers
2k views

What is the best design for docking onto a rotating space-station?

In the distant future, space-stations use centrifugal force to emulate gravity, effectively being a cylinder (or something similar like a wheel) spinning around a central axis at high speeds. A ...
48
votes
12answers
7k views

How many Santas are required?

Since it's that time of year again, we need to look further into Santa's delivery mechanisms. We've discovered over the years that Santa is breaking a few laws, ignoring minor matters like IP laws ...
2
votes
3answers
154 views

Can tribal humans survive in a world with dinosaurs [closed]

So I want to write a novel set in a primal world with Dinosaurs. The humans live in tribes with stone tools. Unfortunately, I am not sure if they can survive at all in such a setting. is it possible ...
0
votes
3answers
256 views

Would an aristocratic government be feasible in a sci-fi story?

So I am interested in doing a kingdom building novel in a sci-fi universe. I was thinking of having a English aristocratic government. With the king at the top and various nobles ( Dukes, Earls, ...
2
votes
3answers
210 views

What's the latest we would notice the gravitational effects of incoming super massive black hole?

Assuming we are unable to see the black hole via any way such as gravitational lensing, accretion disc or whatever. This is hand wave approach just to make my setting work, due to this answer which ...
23
votes
6answers
6k views

How to make a person of color time traveller survive in the middle ages

The story centers around a group of people that get lost during in the woods and -for no apparent reason- suddenly find themselves in 13th century Europe (the Netherlands, to be precise). They don't ...
9
votes
2answers
232 views

Is this station design likely to cause balance or vertigo issues?

This is a follow up to a previous question that I thought should be a new question instead of just discussing in the comments of that one. This is an idea for a space station on the surface of Eris ...
10
votes
8answers
3k views

So much smoke that the suns rays never get through?

In my book I have a city which is constantly dark. The sun doesn't reach it. This is because it's a city of waste, so all the waste gets thrown into this city and lit on fire every single day, which ...
7
votes
2answers
139 views

Let's float an island on an astrophysical jet

An astrophysical jet is a stream of particles emitted by matter falling into an supermassive star/black hole, travelling at up to 80% the speed of light. A troll with a portal gun (which places ...
5
votes
5answers
425 views

Artificial gravity as an engine

I have seen some people talk about the idea of ships using their magical anti-gravity systems in a story in order to not only give ships a standard floor layout and inertial dampener systems, but to ...
24
votes
8answers
8k views

What would happen to a human body subjected to extreme water pressure?

First of all, I tried to look if this wasn't answered before. Found this and this but neither is exactly what I need. Some Context There's this race of humanoid fish people. They live in cities ...
1
vote
3answers
142 views

How to maintain container temperature for as long as possible?

I have two magical stones. The first one—let's call it fire stone—is a stone that able to increase its temperature equal to that of a normal fire. The second one—as you might already guess, is the ...
6
votes
1answer
167 views

How long would an array of mass drivers take to terraform Mars by transporting CO2 from Venus?

So I've always assumed Mars never had enough available CO2 on-site for terraforming, something that new research seems to have confirmed. But my ideas have always relied on getting CO2 from alternate ...
7
votes
3answers
289 views

How plausible is a civilization, or life, that perceives time in reverse?

Humanity, with modern science, has established that the Big Bang happened 13.8 billion years ago. The universe appeared in a low-entropy state, and for billions of years has been expanding and moving ...
3
votes
6answers
195 views

Would planting trees across an earth-like planet to reduce the CO2 and produce O2, be enough to keep it in balance?

An IPCC report of Oct 8, 2018 indicates - to keep the world temperature rise at or below 1.5 C, we need to reduce our CO2 emissions globally from the 2010 level by 45% by 2030, and a further 55% ...
1
vote
2answers
119 views

Could university accept a child without any formal education? [closed]

My story revolves about a life of a girl that is profoundly gifted even among a family of profoundly gifted. Her father founded a multi-billion dollar company focused on IT security and cryptography ...
4
votes
4answers
1k views

Could an industrial and a post-industrial civilization exist at the same time?

One of the big issues I have run into while building the story I'm currently working on, is the fact that their are multiple nations that exist in an industrial state, while others are far past this ...
1
vote
1answer
70 views

Understanding Climate [closed]

So climate is a pretty confusing subject, I've been searching for a very generalized map of climates. I wanna post it hear for some questions regarding this map http://www.geocurrents.info/place/...
9
votes
15answers
5k views

Is a world with infinite resources possible? [closed]

In my current fictional fantasy-ish endeavor, I have a world with a great war. This war is vast and encompasses all of the known land. Due to magical means, soldiers for the war are 'summoned' from ...
3
votes
3answers
154 views

Could an extremely highly evolved society still live in peace with nature? [closed]

As I've been developing my stories, one major point that has remained constant is the state of the major international powers. One such powerful nation, sahats, is an extremely advanced society. They ...
26
votes
14answers
4k views

How to prevent electronic advancement beyond the early cold war era?

Here are what I wants in my world: Early generation of computer with a bulky size and very limited capability, like the text-based computer in Fallout universe. Limited guidance and detection system. ...
5
votes
8answers
389 views

How likely is it that an interplanetary empire could exist in the future?

I'm building a world with an interplanetary empire (with an emperor as head-of-state), but I wonder how realistic it is for one to even exist. An empire, according to Google, is defined as: an ...
-1
votes
3answers
139 views

Can a teleporter kill by teleporting saliva into the target's brain [closed]

What about pieces of hair, phlegm, mucus, sweat, I want the teleporter to limit his powers only to his body. Even something as ridiculous like tears and faeces. I will even extend it to the food and ...
2
votes
4answers
141 views

Can I make the carbon cycle shorter - by metamorphosis from plant to animal and vice-versa

EDITED to address the above suggestion. See below. Most animals breathe in oxygen and breathe out carbon-dioxide. Most plants take in carbon-dioxide and release oxygen. Waste products from animals ...
3
votes
6answers
474 views

Can one individual be used to repopulate an entire species?

An evil scientist has engineered a plague that would kill anyone with an xy chromosome pair. This plague has systemicatically spread throughout the planet, killing all males within the population. All ...
7
votes
6answers
245 views

How can my dragons use their tongues to control their fire breathing?

Some background you may or may not skip I was daydreaming the other day about how tamed dragons whose magic was somehow harnessed as an energy source by humans could be used as a metaphor for nuclear ...
8
votes
2answers
360 views

Could an alien evolve to speak through its anus?

Humans can speak making precise movements of our tongues, teeth and vocal chords. I want a sentient creature whose carnivorous mouth-parts are completely unsuitable for speech to be able to ...
6
votes
2answers
217 views

How long would a flat Earth last?

As we all know the Earth is flat. Once upon a time a group of explorers set off with the idea of proving that the world was round and that there was a route to the spice islands the other way, but the ...
4
votes
1answer
71 views

Visual Cortex, superficial Brain Implant - Biological feasibility

In another question Everybody has a brain implant. What measures can a criminal take to escape justice? I assumed that a brain implant would be possible in the future for surveillance. In this ...
2
votes
2answers
157 views

Creating a scientist-only country in our world [closed]

Wanting to innovate humanity, a multi-billionaire decided to start a new country. He was able to convince a country in Europe to sell a large portion of their land to him. He then constructed ...
0
votes
3answers
238 views

Zombie infection is worse than imagined: how can humanity survive? [closed]

This plague takes some of the worst from every zombie movie you might have seen and puts it together. It's airborne and can survive for a week in the air, and it is transmitted to humans through all ...
25
votes
7answers
5k views

Is intraspecies genetic incompatibility possible?

I'm creating a humanoid species, roughly based on humans. The difference is that not every opposite sex couple of fertile age could produce offspring. The premise of my story is based of some men ...
41
votes
5answers
6k views

Could you do acrobatics and long-distance running in an ankle-length dress?

So this should probably belong on clothes.stackexchange.com, if there were such a thing, but here I am with a question that I hope is not too complicated or specific for this site. My situation: I've ...
6
votes
7answers
360 views

Would this scheme be profitable?

In the not so distant 2040s the world is heading towards a devastating energy crisis, climate change is slowly beginning to take its toll, and unemployment is on the rise globally. But one corporation ...
8
votes
7answers
429 views

Technologically advanced civilization still using melee armor and weapons

Similar idea to this post, why would an advanced civilization able to create AI/ droids ranging from 'hardshell' (I-Robot (movie) or C3P0) to 'soft' (Bishop (Aliens)) still have use for melee combat, ...
3
votes
3answers
182 views

Best natural armor possible for a fantasy humanoid

In my fantasy world a scholar magician creates a sub-specie of warriors with an optimal natural armor against medieval technology weapons. What would it be like? How can I make it as flexible as a ...
-1
votes
1answer
104 views

What are the side effects to an ability that let's you experience the senses from a memory? [closed]

The ability gives you a photographic memory and let's you perfectly recall any event in his life, and experience all the senses (touch, vision, smell, etc.) from a memory by firing the nerves or ...
8
votes
1answer
180 views

How can professional leagues implement gene enchancement into sports while keeping a balance among athletes?

The year is 2050, and genetic enchancement is now commonplace in society. People can currently opt to improve their bodies through the form of gene packages. These are geared towards increasing ...
11
votes
18answers
3k views

A huge transparent wall permanently separates two civilisations - what can it be made of?

I'd like two medieval societies to be separated from one another by a huge vertical wall. The wall is so high that no-one has succeeded in shooting an arrow (or anything else) over it. It disappears ...