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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.

1
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2answers
43 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
3answers
114 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 ...
3
votes
6answers
363 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 ...
10
votes
9answers
340 views
+50

Standardized building materials across a Roman style empire

I am working on an empire that exists in my world. I want to know if it makes sense for said empire to standardize the materials they use for construction across the empire. In the heart of the ...
0
votes
3answers
93 views

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

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 ...
5
votes
4answers
132 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 ...
34
votes
6answers
5k views

Can a radioactive moon affect life on a planet?

This question is meant as a reality check on this answer to The land grows evil and corrupted ... but why? Radioactive moon in a nearly geosynchronous orbit. It slowly kills or alters all life ...
23
votes
10answers
3k views

Anatomically Correct Werewolves

Could werewolves exist in a realistic world? All that is required for an accepted answer is the ability to change shape over night. Bonus points will be awarded if you can explain a bite spreading ...
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 ...
8
votes
2answers
291 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
167 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 ...
0
votes
3answers
212 views

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

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 ...
2
votes
2answers
130 views

Creating a scientist-only country in our world [on hold]

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 ...
4
votes
1answer
59 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 ...
8
votes
7answers
344 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, ...
6
votes
7answers
325 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 ...
40
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 ...
17
votes
7answers
6k views

Is a solar system around a black hole possible?

Is it possible for there to be a "solar system" of sorts with a black hole and a few suns orbiting around it? Could that system be stable and (if so) would it be possible for some civilization(s) to ...
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 ...
2
votes
2answers
217 views

Could faster-than-light supernova remnants form a star system?

Most current planets, and any inhabitants living on them, are ultimately the product of long-dead supernovas that exploded and sent matter across the universe, where it eventually got caught with ...
7
votes
8answers
1k views

Macro-life, colonisation or continuation?

Larry Niven defines a macro-life civilisation as one that lives in interstellar spacecraft, independent of planetary resources and culture, full time and by implication keeps moving. This could mean ...
-2
votes
0answers
49 views

What event could wipe out all of the life of earth? [closed]

I read that the leaders of Countries around the world are fearing a third world war because it would mean that all life on earth would end because nuclear weapons would be used. Therefore, nuclear ...
9
votes
5answers
902 views

Why would civilizations with advanced technology still use castles?

Despite being awesome marvels and once incredibly important, ever since explosives became a thing, castles have become obsolete. Until now... Imagine two equally advanced civilizations at war. Both ...
11
votes
3answers
350 views

Feasibility of an 'Oxygen Radiation Zone': a non-pressurized natural formation on Mars that provides suitable atmosphere

CONTEXT and INTRODUCTION Humans establish colonies on Mars with slightly more advanced technology than we have today. The Martian colonists lose all contact with Earth. Over centuries, the Martian ...
-1
votes
1answer
87 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 ...
0
votes
7answers
251 views

What are the options to incorporate teleportation in my story in a realistic fashion that adheres to the laws of physics?

I'm currently outlining my science fiction novel which deals with humanity reaching Type 3 civilization status. My goal is to place an emphasis on hard science fiction while featuring fantastic ...
11
votes
3answers
2k views

Anatomically Correct Nuckelavee

As a series of anatomically correct myths, here we have the Nuckelavee. Is there a realistic way that Nuckelavee could evolve? Using Earth or near-Earth biology, how close could I get to the classic ...
3
votes
3answers
143 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 ...
63
votes
22answers
16k views

I don't want to live on this planet anymore

I don't like the direction where mankind is going. We spend more resources to build tools which allow us to watch cat videos than on curing cancer. One day I decided to say enough, and leave this ...
42
votes
14answers
8k views

Can the Aztec Empire learn and reuse Conquistador technology?

In this alternate history, Christopher Columbus makes landfall in Central America, after passing south of Florida and sailing through the Gulf of Mexico, arriving right on the doorstep of the Aztec ...
0
votes
2answers
210 views

What might a giant space bubble be made of?

In one of the most empty regions of space between the galactic superclusters there is a giant space bubble, with a radius of about 1,000,000 light years. Most of this bubble is one molecule thick ...
29
votes
16answers
13k views

Best places to be on Earth when an all out nuclear World War III breaks out?

This is a world building question in a preventative context because those people or countries would be left fully functional while others gone and the safe areas is where the world building would ...
1
vote
0answers
65 views

Creating a world run by corporations [closed]

Recently, CDPR Projekt Red released a trailer featuring a dystopian cyberpunk world more or less run by corporations. To give an example, the most powerful (and expensive) medical services group will ...
8
votes
5answers
659 views

Anatomically Correct Jackalope

The jackalope is a mythical animal of North American folklore described as a jackrabbit with an antelopes horns. It's a popular mythological creature in hill folk culture and it made me ask a question,...
8
votes
1answer
174 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 ...
2
votes
3answers
195 views

A Wider Range of Human Skin Color — But Would The Transition Between Shades Be Natural? [closed]

Long ago, it was thought that the peoples of Europe developed white skin as a means of adapting to the low-level lighting of ice age Europe (an assumption that disregarded why the people of Asia don't ...
20
votes
10answers
6k views

How would a “reversed planet” be able to exist?

I want to write a novel situated in a “reversed planet”: there are two stars orbiting each other, and there is a little spot exactly in the middle of the two that is suitable for life. A normal planet ...
8
votes
7answers
6k views

How could I make a portal to parallel universes as scientifically realistic as possible?

[Edit: I'm not looking for 100% realism. I'm looking for an explanation as realistic as possible, possible with just few exceptions to physics.] [Edit 2: In my imagination these worlds are different ...
33
votes
11answers
8k views

Where is the best place to park your damaged spaceship, longterm?

Your large spaceship is damaged beyond repair. You manage to get it close enough to a planet so that you can release emergency shuttle craft. You have very little control over the ship and won't be ...
7
votes
4answers
252 views

Anatomically correct Panotti

Panotti so called from the Greek words πᾶν and οὖς for "all ears", were a mythical race of people, described as possessing large ears that covered their entire bodies. In the Natural History, Pliny ...
21
votes
5answers
5k views

Anatomically Correct Griffins

As a series of anatomically correct myths, here we have the griffin. Is there a realistic way that griffins could evolve? Using Earth or near-Earth biology, how close could I get to the classic ...
18
votes
5answers
3k views

How would a civilization that has been living on a “cube” Earth differ from one on a “spherical” Earth?

Another question based off of this one here. Let's say on a cube styled Earth-like planet, there was a similar race to humans. If the differences in the planets were minimal (besides, you know, the ...
19
votes
6answers
5k views

Can mountains ever transition abruptly to plains?

I'm trying to write a story where the main characters discover the wreckage of a spaceship in the fields that border their town to the west. To the east, there's the end of a large mountain range. ...
5
votes
7answers
312 views

What is the earliest age an actual baby can use his vocal chords to speak?

I am making a reincarnation novel with all of the protagonist's memories intact from the previous life. So what is the time when the protagonist can actually communicate through speaking?
28
votes
7answers
11k views

Is it possible to perform surgery on your own spine? [closed]

My character has to perform surgery on herself and by herself. She has all the surgery tools and a screen to watch what she is doing. She is in a clean stable environment and there is no risk of ...
13
votes
13answers
2k views

Would a society of simultaneous hermaphrodites have gender roles?

I'm trying to create an egalitarian society on an Earth-like planet, populated by simultaneous hermaphrodites. The hermaphrodites are similar to human women that have both male & female sex organs....
48
votes
13answers
8k views

How to explain centuries of cultural/intellectual stagnation?

I'm moving a ton of people (asteroid miners and affiliated personnel living in the Asteroid Belt) onto a generation ship which will take years to reach its cruising speed of .1c, and which is part of ...
11
votes
6answers
501 views

Ringstadt: Can my mountains be what I need them to?

When the old mining town was founded, nobody did think of this ever growing into much more than a coal-mining town. The deposits of iron-ore, aside from the already developed peat bog to the north, ...
25
votes
17answers
5k views

How can I encourage responsible business practices among necromancers?

I am DONNA TRUMPET, the first female President of the United states reborn, and one of the greatest leaders in world history. I have managed to recently pass the 103rd amendment to our Constitution ...
9
votes
6answers
238 views

How could an agricultural revolution develop in medieval societies inhabiting a tropical environment work?

I'm trying to work on a chapter in my lore but I'm stumped on how agricultural developments could work in tropical settings, and real world examples so far mostly include temperate places, I.e. ...