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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8answers
1k views

How Would I Make an Oceanless World Feasible?

The planet I'm thinking of is of similar size and distance from its star relative to Earth, but it lacks oceans, instead consisting of one massive continent with a huge mountain range (reminiscent of ...
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4answers
63 views

How fast do you need to throw a wooden stick for it to be lethal with bare hands? [closed]

how hard does one need to throw (With bare hands) in order for a lowly stick to become lethal ? Also taking into account distances, both close and long distances. Finally how much strength would be ...
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8answers
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How can we catch an invisible man?

Some Background The government is really, really good at catching people as we learned here and here. But as logic would dictate, there is always someone better. In this case, an invisible man. ...
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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 ...
9
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4answers
368 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 ...
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2answers
76 views

What would happens if a human was compressed to the shape and size of a volley ball?

Imagine a device that forms a spherical electromagnetic barrier around an average human, and rapidly shrinks until its approximately the volume of a volley ball. What would be the aftermath other than ...
2
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1answer
78 views

What could have been the history of a world where programming skills are considered to be basic literacy?

Sometimes I hear from other professionals, "it has become impossible to talk to IT professionals, what they talk it sounds like gibberish". There are lots of efforts for better connecting to ...
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2answers
92 views

What might a world look like where basic programming skills are as common as literacy today? [closed]

In the other related question, I am exploring how might a world like ours develop to a world where programming skills are considered to be basic literacy. Currently, possibly less than 1% of world ...
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2answers
66 views

I need a spacecraft to be pulled into the sun’s gravity!

So, as I understand it, the spacecraft would need to move in the opposite direction to the orbit. Are there any calculations I could make to attach a clicking-tock onto this? If the spacecraft were ...
4
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0answers
44 views

Could the MUTO wing structure work in any way?

The male MUTO creature new godzilla movies has a very peculiar wing design: despite having leathery wings, those don't connect to the side of its body, but to two support "rods" that seem to come out ...
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0answers
45 views

Could ocean and wind currents form on a tidally heated body

The moon is similar to earth but orbits around a gas giant, the sun has ended its life cycle and so the only energy received on the moon comes from tidal interactions heating its core. On earth and ...
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3answers
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can spacecraft heat be 'vented' with entangled particles?

Basically, the title. Trying to figure out how reasonable stealth in space would function, and while I have mitigated it, I am looking for methods to improve it. But mainly, is creating a sort of heat ...
4
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3answers
160 views

Evolution of flying skulls?

We may all have some familiarity with winged skulls - from Avenged Sevenfold's album covers to bikie shirts. However, for my science-fiction/horror story, I am curious about how these creatures would ...
14
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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? ...
2
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4answers
50 views

How could Ice Spikes naturally occur?

Working on a medieval setting I thought of the idea of a biome similar to Minecraft Ice Spike Plains where this ice structures naturally occur. These structures in particular are tall and sharp towers ...
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 ...
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4answers
396 views

How fast could you run a human brain?

Accelerating a person's perceived sense of time is a fairly common subject in science fiction, and to keep a long story short, I was wondering just how far you could stretch time out when you're ...
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23answers
11k views

What scientifically would make it possible that certain large bodies of water be impassable?

What scientifically would make it possible that certain large bodies of water be impassable while others that seem very similar are able to be navigated? This is not what I am attempting to do, but ...
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0answers
49 views

How would a Universe-wide species operate [closed]

Let’s say in the far far FAR future, humanity has colonized the entire universe. Technology allows for faster than light travel, immortality, the building of megastructures, e.t.c. Now, humanity will ...
17
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10answers
4k views

Could Byzantines bridge a deep strait separating 2 continents?

In my book series, there are 2 main continents on the planet Aurea: Koumaris and Louzi. There is a spot here where the 2 continents come very close to touching, separated only by about 2,500 feet (760 ...
24
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14answers
8k views

A Society Built Around Theft?

Would it be possible for a stable society to be built around the concept of theft as a positive action, and thievery as a virtue, while still having theft be technically illegal, but having the ...
3
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5answers
2k views

Building an interstellar starship during transit

Would it be feasible to have an interstellar vessel be constructed in flight after smaller sections are boosted up to speed? The idea here is about using laser sails which would be easier to use with ...
37
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7answers
9k views

How many years could notebook computers and phones be stored in a closed bunker/vault and still operational when found?

The idea is for some people in a post-apocalyptic future to find these bunkers/vaults and be able to turn on the computers and charge the cellphones. How many years could the equipment last if they ...
2
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1answer
96 views

Stability in Lowering a Space Elevator

First question on stack exchange I’ve been lurking and learning for years and finally decided to pose a question for a novel I’m working on. Given the appropriate advances in material sciences and ...
22
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5answers
3k views

Realistic fantasy slimes

Foreword: I'm aware of the limitations of the square-cube law involved in sizing an animal up, as these limitations have been relentlessly stressed in every discussion of realistic fantasy creatures. ...
4
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1answer
175 views

Can an animal develop a facial disk through muscle and bone alone?

In some birds especially owls, we can observe a structure called facial disk, which is mainly composed of feathers and helps to direct sound to their ears. While being more common in owls, adding up ...
1
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1answer
127 views

How big does a pelican type creature need to be to carry a grown up human inside its mouth and still fly?

as the title, my question is how big a pelican like creature with its pouch mouth need to be in order to carry grown up human and still fly. since as far as i know hollow bone is to fragile for human ...
6
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1answer
92 views

What would be the an avarage and/or realistic population density be for an medieval based city?

I'm currently building a world for a medieval based D&D campaign (i know super original) and I'm trying to make my cities as realistic as i can. Right now I'm planning on making a city in the ...
6
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3answers
108 views

Biology behind a monster that is able to remain invisible

This is a post-apocalyptic setting I'm working on. The world has been overrun by invisible monsters from another parallel universe. They can be heard and smelled, and they can form claw prints on the ...
2
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1answer
85 views

Anatomically Correct Diclonius

The Diclonii are an evolutionary offshoot of modern homo sapiens from the Elfen Lied series. Most Diclonii can get distinguished from humans thanks to small bone and cartilage horns resembling cat ...
2
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2answers
187 views

Anatomically Correct Cockatrice

In short summary A cockatrice is is essentially a a two legged dragon that has the head and body of a rooster, it also has a serpentine like tail and either has feather like wings or webbed like ...
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0answers
47 views

Titles and honorifics for a female-only, quasi-Islamic society [closed]

I'm trying to write a female-only, quasi-Islamic society. By society, I mean something between a Masonic lodge and an order of chivalry. The closest thing, in fiction, to what I'm aiming for is ...
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3answers
119 views

Does the humanoid body plan necessitate sapience to be viable? [closed]

in most science-fiction stories that include alien races, said aliens have a roughly humanoid appearance (being an erect bipeds). now while it's likely that the vast majority of sapient life (beings ...
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4answers
4k views

How does a society domesticate the hippo?

Hippo's are one of natures most efficient food > weight animals, making them perfect for food. Additionally they are arguably the most dangerous land mammal, meaning they are hard to domesticate, very ...
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9answers
5k views

Alice has been shrunk! Will she notice?

Situation: Someone (let's call him Bob) is playing games with someone else (let's call her Alice). Bob used his shrink ray to reduce Alice in size by about 40% (for the purpose of this question, don'...
3
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0answers
54 views

With dunkle-like Jaws, how long could the neck be?

The Apex predator of the Sea of Grass biome from planet Andromeda is mostly bipedal, but capable of facultative quadrupedalism, it has long limbs, powerful claws on its hands and is roughly the size ...
34
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17answers
4k views

Could plants spread their seed to other planets?

Assume a plant was engineered to cope with a wide range of different environments, and to have seeds that were capable of traveling through and surviving both the depths of space and re-entry into ...
1
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1answer
155 views

If I removed the gold from my phone [closed]

So I have a rather short question: what would happen if all the gold disappeared from my phone? Now, I know, most likely it would just stop working. But precisely, what would we see first? Would ...
8
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4answers
945 views

is it possible for creature to have loose jaw like snake but also has enough bite strength to bit off big chunk like most predator or human do?

I want to create a glutton creature that can open its mouth wider than the prey item like snakes do, but also can bite through that big hard object and even chew it; this creature doesn't swallow prey ...
1
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0answers
69 views

Triceratops cart load

I'm designing a world where people and dinosaurs exist at the same time. I'm making it realistic (in the sense that it is more like Jurassic Park and not like The Flintstones). Supposing you could ...
3
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2answers
122 views

Can Magic Enhance the use of 19th Century Firearms?

The setting is a post-apocalyptic Earth, a few hundred years after a "world-ending" war. What remains of humanity is beginning to emerge from Fallout-esque shelters, but (more importantly) magic ...
27
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12answers
5k views

Without modern electronics, how could you determine your longitude, latitude, and altitude while lost deep underground?

Brief setting notes: it's a "basically earth" type situation, a spinning ball of rock in space with the same size and gravity and atmosphere and magnetic fields and everything else. The main ...
3
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13answers
4k views

Why would a very advanced Transhumanist Civilization ever need to have a military or wage wars?

My Setting First of all, let's define what a very advanced transhumanist civilization is in my setting: 1- Post-scarcity civilization (Kardashev level II or even III) where everyone has abundance in ...
6
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1answer
358 views

How practical would war boars be?

along with horses Orcs have also bred giant Boars which they ride it battle. these war boars have been bred to be the size of Entelodont with larger tusks and I was wondering in what field might ...
39
votes
8answers
6k views

What light colors/bulbs should be used inside a spaceship?

I've noticed in recent scifi shows/movies such as the Expanse or Star Trek that the lighting inside spaceships have two characteristics: Punishingly blue lighting Dark/dimmed miscellaneous lighting ...
4
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3answers
172 views

Would it be logical for races to have their own colonies to preserve their cultures post-Apocalypse?

In my story, Earth was destroyed and about 19 million survive (from races and cultures from all over the world) and go to a new planet as their new home. At the start of my Sci-fi book, it's set 125 ...
55
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11answers
16k views

Is a man-eating plant realistic?

Carnivorous plants live in nutrient-poor, highly lit habitats, such as bogs or rocks. For example Earth's biggest carnivorous plant, Nepenthes rajah, lives on mountain-tops with high concentration of ...
15
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6answers
2k views

2 elbowed forelimbs: advantageous or detrimental?

On plain Pilar forest biome of planet X, you have mostly 3 types of vertebrates: those who burrow under the ground those who run through the widely separated trees those who live above ground level, ...
3
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2answers
143 views

Harvesting Energy from Gas Giants

In my world, humans live on a moon of a gas giant that has extreme weather conditions. They also: have crystals that can store energy. possess the ability to make floating islands (on which they can ...
6
votes
1answer
90 views

Temple fell down sinkhole in mining area, toxic gases

My temple was built near a kaolin surface mine, which is itself topping an old deep mine (where they used to mine radioactive metals, rare earths and possibly other miscellaneous, if need be). This ...

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