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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.

37
votes
23answers
12k views

Make slimes great again, but how?

Slimes are seen as merely base-level enemies which don't really challenge the heroic main character, the Chosen One. My question is how to make slimes incredibly powerful without using magic. They ...
1
vote
3answers
149 views

Can An Adult Be Genetically Engineered? [duplicate]

Would be possible to apply genetic changes (like splicing in a radiation hardening gene) to an adult human? With near future technology, like advanced forms of CRISPR? Or can things like that only be ...
2
votes
5answers
163 views

Is it possible to erase a car's “identity” beyond forensic examination?

Suppose you don't want anyone to know where your car comes from, who's owned it before and even where it was made. Is it possible to make this car "unidentifiable" even after thorough forensic ...
23
votes
10answers
3k views

Realistic geological and chemical composition of an edible planetary surface

We all at some point in our childhoods thought that the moon is made out of cheese. As such, I thought: under what circumstances can a planetary surface form in such a manner that it is edible (and ...
3
votes
1answer
74 views

Reality check: multi-shell worlds and rotation

In the game Septerra Core, it is set on a shell world of 7 different world shells including a core. As per my Matryoshka world that I am building (this world but with full surface coverage on each ...
2
votes
5answers
320 views

Would a Psycho Killer still get a high body count after 40 years in jail? [closed]

Johnny Killspeople is a troubled person who likes to kill people with melee weapons. 40 years ago he went on a spree and brutally killed a lot of people in a small town. After a few incidents he was ...
17
votes
14answers
5k views

Designing a river which does not overflow

... And if it absolutely has to, then such river should overflow in predictable matter. I have a city idea in mind, where such the city has a river contained in an artificial tunnel beneath such city....
2
votes
3answers
164 views

What are some real world examples of mental impairment i can use for my magic system?

My question: What are some real word diseases, disorders, drugs, effects, etc. that interfere with a person's thinking-ability (but do not cause blackout)? I am creating a magic system in which I ...
2
votes
2answers
155 views

Can my mermaids work?

Looking to how I can make Nagas and Mermaids able to exist and evolve in my story, I came across this post which explains how Nagas could evolve from humans: Anatomically Correct Naga In the top ...
2
votes
1answer
90 views

If humans die out would ruins of modern civilization be left in 10,000 to 20,000 years [closed]

I'm making a post apocalyptic story that take place 20,000 years in the future. And I want to know if modern civilization ruins would be around after that. stuff like buildings, signs, ...
7
votes
5answers
226 views

Is it possible for a terrestrial creature to generate lightning?

Question Context: I've been developing insect-looking bipeds that have evolved on a mostly jungle/ocean planet in addition to small, scattered grasslands. This is justified (from what I've read) by a ...
3
votes
5answers
380 views

How could a person survive and then stay alive, even when they are actively decayed?

So, in my world, a scientist (tries to) invents a machine that will recode your cells in a very particular way, making you immortal. He tests it out on a 13 year old male. It goes....extremely wrong. ...
3
votes
2answers
118 views

Can Mollusks Develop Bone Independently?

When one thinks of a shelled cephalopod, odds are high that the first thing to come to mind are the ammonites. They were one of evolution's success stories, thriving from 400 to 66 million years ago. ...
4
votes
3answers
180 views

What are some real world sources of mental impairment that I can use in my magic system? [closed]

What are some real word diseases, disorders, drugs, effects, etc. that interfere with a person's thinking-ability (but do not cause blackout)? I am creating a magic system in which I want to create ...
-2
votes
1answer
119 views

Reasoning on conditions required to argument long term high federal investments in space exploration [closed]

History has shown that the Space Race in the 20th century between US and Soviets has been high enough to motivate US to increase federal NASA budget to [about 4%] of the federal budget 2, compared to ...
5
votes
5answers
202 views

Would subways/trains be adapted to be practical for various fantasy species or would something else be invented?

The title says my question exactly. Also if another mode of general transportation were invented for a landlocked city, what would it be? Below are the specific fantasy species that I am dealing ...
1
vote
4answers
161 views

Biology of hermaphrodite species

How from a evolutionary standpoint hermaphrodite species can exist and have a good genetic diversity, with no self-impregnation? But, this race visually looks more like females, they do have breasts ...
1
vote
1answer
72 views

Is this planet's sulphur dioxide atmosphere feasible?

My planet is highly volcanic, as such the atmosphere is filled with gases put off by the volcanoes: Like Earth Nitrogen also makes up most of Marhdii’s atmosphere at 43%. Also like Earth, Nitrogen ...
0
votes
1answer
63 views

Feasible size for an itinerant military [closed]

The story I'm writing exists in a world technologically equivalent to the late middle ages and is about an itinerant militia that makes their living primarily through hunting large and dangerous ...
13
votes
6answers
2k views

Whence unicorns?

I have a story in a mediaeval setting with no magic. There are elves, but they are essentially just absurdly long-lived versions of humans with pointy ears and somewhat more acute senses. Unicorns ...
4
votes
4answers
2k views

The plausibility of a water canopy [duplicate]

Once I heard a creationist say that the earth once may have had a hydrosphere layer up above our natural atmosphere, which implied that a substantial layer of ice covered the earth and created a ...
4
votes
2answers
539 views

Interstellar “reefs”, plausibility and detection [closed]

Most of the interstellar medium is, as far as we can tell with current technology, pretty empty and most of what is there is in the form of single atoms or tiny particles only a few molecules across. ...
4
votes
2answers
271 views

Why everyone hates the undead? [closed]

After death some might turn into undead by different means of magic. when brough back to life as an undead gaining new sheer strength and magic powers is to be expected while things like sense of ...
7
votes
6answers
3k views

Would a society with two different species that can interbreed be viable?

One species has two genders, like humans, the other has three(essentially male, female, and one without breeding capabilities that first appears as a genetic quirk but quickly becomes more prominent ...
0
votes
2answers
136 views

How to make my map realistic? [closed]

So I'm making a map of my fantasy world (it's got six main continents and it's an earth like planet) and I'm not entirely sure how to make it realistic, and I'm not entirely sure where to start. I ...
2
votes
1answer
103 views

Controlling Nanobots in the Bloodstream as a Form of Torture?

An oppressive government entity roughly 70 years in the future has access to elite--albeit experimental--technology. One such technology is a brain chip that allows its soldiers to control simple ...
9
votes
4answers
2k views

Would it be possible to create a flexible and useful armour with woven metal wires?

Essentially could I make flexible cut proof clothing with flexible metal wire? Or would making the wire flexible require making them so thin that slicing is easy? Edit: naturally gambeson or some ...
30
votes
8answers
4k views

Is it possible to film the meteorite impact that led to dinosaurs extinction? [closed]

A time traveler reporter team wants to film the meteorite impact that led to the extinction of dinosaurs. They are thinking to teleport somewhere on Earth surface 30 minutes before the impact and to ...
6
votes
2answers
223 views

Giant shoulders

Many fictional characters,specially in the anime art have shoulders bigger than any other upper body muscle. Normally the obliques,chest and latissimus dorsi are the biggest muscles in the upper body ...
1
vote
1answer
140 views

What would force the “illuminati” to cull the world? [closed]

Premise This is an uncomfortable topic, perhaps even bordering on distasteful. That being said, the world I have in mind will not be complete unless I can settle on a threshold that the "illuminati" ...
10
votes
5answers
336 views

Reality Check: Discovery of Iron Bloomery without a preceding Bronze Age?

The setting that I am working on has a population of humans living in a place that does not have abundant copper or tin resources, so it is unlikely that they'd discover Bronze. However, bog iron is ...
-1
votes
3answers
135 views

What missile defence system can defend a country from thermonuclear ICBMs? [closed]

I have a fictitious country, let’s call it Democratica, which is a democratic western nation, threatened by a neighbouring communist state (called Sovietania.) Sovietania has a number of Soviet and ...
8
votes
2answers
1k views

Climbing up on running water

I remember playing this game back in 2010-2011, and In minecraft if you found a waterfall you could actually swim it up vertically, it was difficult but possible. Does this apply to real life to, ...
1
vote
1answer
100 views

Would there be any need for a space battle? [closed]

In space fantasy movies, you see huge space-battleships, like Star Wars. You have to think of stuff like that. These battleships: Fight at a close range Mostly laser guns Have smaller fighter ...
33
votes
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 ...
31
votes
16answers
4k views

Why would precursors create devices that can survive and still work after hundreds of years? [closed]

In many stories, there are precursor artifacts that often have miraculous powers. Often, those artifacts are hundreds, if not thousands of years old. But, looking at our own technology, most of our ...
3
votes
3answers
167 views

What happens to the human body when hit by a magic lightning and a frozen arrow at the same time? [closed]

What happens to the human body when hit by a magic lightning and a frozen arrow at the same time? The lightning power is strong enough to shock but not to kill. The point where the ''combined spell''...
8
votes
2answers
262 views

Subtropical Ridges on a Cold Planet?

I am working on the realism of a fictional planet which has an average temperature lower than that of the Last Glacial Maximum (LGM), and possesses a single large supercontinent rather than ...
3
votes
6answers
192 views

How could physical fitness and arcane magic be linked to each other if they operate differently?

Souls are made of chakra, which is the life force of all things. People are born with different levels of chakra that remain the same throughout life. Shamanism is a form of magic that uses your ...
3
votes
1answer
143 views

History without resource driven wars

Usually when a population overgrows it expands in search of new land and if the fields are virgin and empty they become farmland and cities, but if the fields are already occupied and the resources ...
25
votes
13answers
9k views

Could a species with a lifespan of 20 years achieve enough technological progress to reach space?

I'm current planning a story which includes a race of diminutive humanoid aliens, one of whom crash-lands on Earth. They're fully sentient, and have the same average intelligence level as humans. The ...
12
votes
8answers
7k views

Arrow proof medieval glass

In my world, I have ''classic'' knights but with helmets that have transparent visors which are strong enough to protect from arrows. So which material available in medieval times could withstand an ...
6
votes
2answers
1k views

What did shipping/storage crates look like in the Middle-Ages? [closed]

If you search "medieval crate" on google you get 2 things: 3D crates that look suspiciously modern or you get real, chest-like boxes. I'm wondering if the latter is the norm for the time period?
26
votes
7answers
11k views

How can a person be kept alive while being periodically drained of blood?

I have invented a large machine that allows me to create monsters out of blood. These monsters are called golems and are very powerful. My plan is to produce a large number of them to include in my ...
-4
votes
4answers
164 views

Can a land-based organism get to be at least 100 ft. in length and still be plausible?

Basically, I'm trying to see if a land-based creature roughly between 50-100 ft. long could exist on Earth at the moment and still be scientifically plausible. I know that whales and other creatures ...
1
vote
3answers
161 views

Ice Age Cavalry

The history of horse domestication, according to recent research, starts somewhere on the plains of eastern Europe 6,000 years ago. Since then, cavalry had become a major turning point in Old World ...
7
votes
2answers
126 views

Could the TRAPPIST-1 planets have moons?

The TRAPPIST-1 planets are all very close to each other and thus are subjected to strong gravitational forces amongst each other and to the red dwarf they're orbiting. Would it be possible for them to ...
4
votes
2answers
281 views

City defenses against kaiju attacks?

In this series I'm mulling, kaiju have been around since prehistory, turning up off and on right up until modern times. In the near-future of this alt-history, say in the next twenty years (2040ish), ...
0
votes
3answers
1k views

Would simultaneous hermaphrodites wage war?

I have a world where populated by simultaneous hermaphrodites. Which are like human women plus male reproductive organs, penis and testicles. They could father children like human males, and bear ...
6
votes
2answers
275 views

Dragon flight muscles

So, Mark Witton had a lengthy article on why paleontologists think the Quetzalcoatlus northropi could fly. One interesting thing about it is that Witton and Habib think the Quetzalcoatlus had a 90-...