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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62
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23answers
11k views

Why would people bury their dead in tombs when they might become zombies?

This is partly a Skyrim-inspired question, but also relevant to a story I'm trying to flesh out. In this world, magic and necromancy are perhaps not commonplace, but certainly not unheard of. Walking ...
0
votes
1answer
89 views

Feasibility of humanoids with bird heads

Humanity has spread out in the cosmos, colonizing various worlds, cataloging countless creatures, the usual interstellar species activities. One day, however, humanity finds a species that is arguably ...
7
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3answers
2k views

How to control a nanobot swarm

Say you somehow invented 50 thousand nanobots that are the size of medium sized bottle caps. Each are capable of hovering for a limited amount of time but do recharge with both solar energy and plug ...
21
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5answers
4k views

Realistic Unicorns

Contrary to popular belief, Unicorns are not related to horses but instead are descended from the Siberian Unicorn. Over time: their fur became whiter they became slightly smaller they have an above-...
3
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3answers
195 views

What evolutionary pressures would lead to fairies?

Consider this a remake of my Why might a group of insects evolve to resemble humans? post. Fairies are a common trope in fantasy works some characteristics of fairies and their associates are: ...
4
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2answers
199 views

Whats the largest a kraken could get? [duplicate]

Krakens are commonly depicted as being large enough to bring down entire ships: The largest animal ever, the blue whale can reach up to 33.8m (111ft) long but it seems that they've reached the limit ...
1
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1answer
72 views

how might flame retardant feathers work?

male Wyverns collect shiny objects in their dens to attract mates it quite common for Wyverns to get into territorial fight. Now Wyverns are capable of breathing fire but they are also covered in ...
17
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12answers
6k views

Planet with only plant life?

Is it possible for there to be a planet where no animals, only plants existed? What evolutionary reasons would cause this, if possible?
-4
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1answer
215 views

Anatomically Correct Catgirls

This is a submission for the Anatomically Correct Series Valentines days is coming up and what better way to celebrate that than worshiping our lord and savior Elongated Muskrat and his attempts to ...
10
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3answers
395 views

Realistic sea humanoids

bucking the trend of mermaids I've decided to take a different approach with my mermaids. A long time ago a group of Australopithecus diverged from us taking to the sea. some characteristics of these ...
4
votes
3answers
143 views

Creating a plausible Wendigo fever

It is believed that Wendigos are supernatural beings with an insatiable hunger for human flesh, or humans who are selfish and commit cannibalism and while the latter is more accurate, Wendigo fever is ...
8
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2answers
284 views

Anatomically Correct Leviathan

This is a submission towards the Anatomically Correct Series The leviathan, (in biblical terms), is describes as being a colossal serpentine like creature, it’s back is covered in scales that are ...
2
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1answer
107 views

Anatomically Correct Sphinx

This is a submission for the Anatomically Correct Series Egyptian Sphinxs are depicted as lion with a humanoid face. the question I want to know is why might a lion conveniently evolve a human like ...
7
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4answers
174 views

Why would a flourishing land-based civilisation move under-water?

For what reason would a civilisation experiencing an almost golden age in industry and agriculture, experiencing no catastrophic plague almost all move underwater in as such that they live entirely ...
4
votes
1answer
104 views

Could birds conveniently evolve sapience?

Next to angels, various types of bird people are among some of the most common depictions of flying humanoids. Revali from BOTW comes to mind. Could birds (or any other flying animal for that ...
2
votes
2answers
296 views

Could my Wyverns exist?

A long time ago, Yi Qi diverged into three main groups: Cockatrices, Drakes, and Wyverns. Some characteristics of Wyverns include: They are tetrapods/quadrupeds They are covered with feathers They ...
3
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4answers
149 views

Anatomically correct Gigantes

A creature from Greek Mythology; giants with legs that resemble snakes that fought the gods and Heracles in a war (not to be confused with the Titans). Is such a creature possible to make anatomically ...
2
votes
0answers
71 views

How long would it take for dwarves to develop whiskers? [closed]

A long time ago a group of Neanderthals moved into the mountains (becoming the last major stronghold for them), taking residence in the massive cave systems there. Over time they became shorter, being ...
7
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6answers
596 views

What jobs would halflings be suited for in a medieval setting?

A long time ago homo floresiensis split off into two main groups: goblins and halflings. Now, halflings still need to eat, and therefore, they need a job to make money and support themselves. Basic ...
9
votes
1answer
188 views

Could a serpentine dragons exist?

Contrary to popular belief serpentine dragons are not in fact magical or related to the European wyvern but instead are descended from the Chrysopelea. some common characteristics of serpentine ...
3
votes
2answers
74 views

Could a prosimian conveniently evolve sapience?

Prosimians on average are not as intelligent as their simian counter parts with the notable exception being lemurs which live in semi large groups. what I want to know is could a group of prosimian ...
7
votes
4answers
225 views

Ancient 3D Printing

Worldbuilding Stack Exchange. I ask for your aid. In my project, an Bronze-age alien civilization living near the coast has discovered a mollusk that can secrete ooze that later hardens into nacre, ...
5
votes
2answers
94 views

Carbon Monoxide Rich Atmosphere

I want to make an atmosphere rich in carbon monoxide, but as it doesn't stick around for very long, it will need to be replenished. I'm looking for concentrations comparable to those of carbon dioxide ...
4
votes
2answers
155 views

What benefits would a symbiotic relationship with an algae provide to an orc? [closed]

In the story I'm writing, Orcs and Goblins have both conveniently evolved a symbiotic relationship with a type of algae which grows in their skin. I was wondering - what kinds benefits would a ...
5
votes
3answers
263 views

Whats the furthest two hominids could diverge from one another and still be able to produce viable offspring?

In many fantasy stories humans are capable of inter-breeding with different fantasy races. There is a precedent for this happening with neanderthal and Denisovan DNA being found in people of Eurasian ...
8
votes
9answers
2k views

When (if at all) would an arm cannon be practical?

Having a weapon attached to your arm that restricts the use of your hand is a common design trope in sci-fi-themed video games, such as Mega Man or Metroid. They even appear in the Marvel movies ...
4
votes
2answers
88 views

Feasibility of albino lizard people

Recently, I’ve grown curious about this lizard men folklore, which revolves around lizard like beings that have the frame work of humanoids. Now this got me thinking of a more human like reptile ...
4
votes
4answers
214 views

How do I preserve the Megafauna in my world?

Over 100,000 years ago giant megafauna roamed the earth such as mammoths, gigantopithecus, and giant sloths. fast forward to today and most megafauna are extinct (with the notable exception being in ...
8
votes
5answers
153 views

Predatory Mimicry?

Mimicry is a common thing in nature--plants employ mimicry to attract insects, prey-candidate animals employ mimicry to look like more threatening things or to hide. And there are plenty of mimic ...
2
votes
1answer
142 views

One half of my population was eliminated. How do I restore them without causing havoc? [closed]

A few years back, the Evil Overlord magicked away half of the world population - they were effectively locked away in time, for all intents and purposes. Then, against all odds, the Super Team was ...
1
vote
2answers
148 views

Could someone be born mute [closed]

In a story I'm writing, the main character is a mute and I was wondering could someone be either born mute or become mute at a very young age in a medieval setting? Note: magic does not exist in my ...
9
votes
4answers
369 views

What evolutionary pressures would lead to Goblins?

A long time ago homo floresiensis split off into two main groups Goblins and Halflings. Now Goblins are an odd little bunch (here's a rough mock up of what a goblin might look like) and I was ...
7
votes
2answers
231 views

Anatomically Correct Yoshi

This is a submission for the Anatomically Correct Series For 30 years T Yoshi Munchakoopas has been been helping Mario out in many adventures even reuniting him with his brother when they were ...
2
votes
1answer
80 views

Human Acid Blood [closed]

Inspired by this clip, the question arose what today's society would look like if humans (Homo sapiens sapiens) had blood that is so acidic that it eats through all matter. The only exception to this ...
3
votes
1answer
72 views

Reality Check on Forest Placement

I'm trying my hand at this new map-making program and while I know the basics of rivers and mountains, I realized I don't know the fundamentals of where to put forests. I've tried to follow the rules ...
2
votes
4answers
187 views

Would an anti-gravity organ allow kaiju to avoid cube-square problems?

It is (around here, anyway) quite well known that science does not allow the existence of kaiju, mainly because of the cube-square law. bones rip themselves out To my understanding, this boils down ...
3
votes
1answer
278 views

Anatomically Correct Sonic

This is a submission for the Anatomically Correct Series. to celebrate the upcoming Sonic movie I've decided to ask the question of what an anatomically correct Sonic would look like? Based on all ...
25
votes
15answers
7k views

How do I explain the long life spans of Elves?

Elves in fantasy are commonly depicted as having long life spans and that applies to my story as well with Elves on average living between 250 and 270 years. The question is how would this work and ...
14
votes
3answers
1k views

What evolutionary pressures would lead to Orcs?

In my story Orcs, humans, and a bunch of other fantasy races live along side each other and i'm curious as to what evolutionary pressures would to a group of divergent hominids to evolve into Orcs? ...
1
vote
1answer
111 views

If a human body were to break down into simple gasses of its component elements as a means of shapeshifting how much solid matter would be left? [closed]

The setting I am working with has several individuals with shapeshifting powers. To deal with the inevitable “shapeshifters seem to violate conservation of mass while shapeshifting” issue, the rules ...
3
votes
3answers
338 views

Could these trolls exist?

In a world I’m designing, a group of Homo Habilis or even Australopithecus Afarensis migrated into a northern Scotland environment becoming Trolls. These are not D&D trolls, but something else. I ...
0
votes
1answer
99 views

Could the Goliath monster from “Evolve” (the game) feasibly exist

My first quest on this platform was, could the Kraken monster from “Evolve” (the game) feasibly exist, which I planned to follow up with the rest of the playable monsters. Appearance The height of ...
6
votes
2answers
160 views

Feasibility of leaf scorpions

Recently, I’ve taken a small break to establish a story bound universe, so that these questions can actually prove useful in the future Recently, humanity has discovered a vast earth-like planet, ...
3
votes
4answers
216 views

Mountain sized colossal animal--could it survive, and could it move it's body around?

The question is in the title, but I have bolded the main details to reality-check. I hope that makes it easier to read. Details: I had the idea of a fantasy/sci-fi animal that never stops growing, ...
4
votes
1answer
137 views

Could there be a being made of gas complex enough to be sentient?

Basically, could a gas stick together enough to be internally coherent, and act like animal cells? Or is there zero chance of that happening?
9
votes
4answers
168 views

Rejoining body parts: How would it work?

Reattaching severed limbs is a recurring theme in many monsters, but never has it been explained HOW they reattach their appendages. I doubt the neurons would magically realign and begin to function ...
19
votes
11answers
6k views

Is my river map even remotely realistic?

Hello there, it's my first time posting, so I'm sorry if I'm going against formatting. I'm making a continent for a fantasy setting, and have been firstly focusing on geography. This continent should ...
5
votes
1answer
106 views

How to have hollows with complex plant and animal life on a planet

This is a slight continuation of my other post where I was trying to create realistic hollows with weather due to temperature changes due to bio minerals called Hearthstones. I was wondering if plant ...
10
votes
5answers
368 views

How could someone use genetics to place a skin tattoo on their descendants?

Imagine a world quite like our own, except where technology took a different turn. Instead of researching communication, transportation, the cosmos, and the general nature of the universe, scientists ...
7
votes
2answers
241 views

Could people feasibly have gems implanted in their bones?

Incidentally, this isn't for a current project, just curious about an old one. When I was in High School, I started then sort of abandoned a LOTR-esque novel idea. In this world, the elves' main ...

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