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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1answer
30 views

Effects of 75 degrees (Celcius) on human body

Question: How long can a person survive before effects of heat stroke start to affect them. Situation. A person is in a room that is heated up to 75 C (167 F). Let's assume person is naked (so we don'...
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3answers
52 views

Double planet climate

How far would 2 tidally-locked (to eachother) planets need to be from their blue star host to be habitable, but have a cold-weather climate similar to our Ice Age?
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3answers
215 views

Making Dual Wielding Possible-And Effective

Self-explanatory title, right? No? Dual wielding is a common theme in fiction, but according to research is way too impractical; two weapons get in the way of each other, striking with both blades is ...
3
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1answer
62 views

Cooling My Giant Dragon

So I have a giant nuclear powered dragon. This beast is about 2 miles long with an equal wingspan and often spends the majority of its time asleep, passively absorbing nutrients from the air, water, ...
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5answers
1k views

Fire mage vs. magnesium dust attack

The probable results of the below (in my imagination) would be a toss-up between asphyxiation, blindness, and/or molten magnesium in uncomfortable places but I'm not entirely sure. So given this ...
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3answers
142 views

How could a vampire acquire specifically human blood without killing anyone?

I've seen a similar question posted here, but my vampires require specifically human blood. Anything other than human blood or water is disgusting and indigestible to them. Some more notes: Drinking ...
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2answers
172 views

How frequently can I pound my civilization with rocks and expect it to rebuild between?

I have a civilization living on floating reefs on a pure water world (no land other than the reefs). There are creatures on the planet that extract relatively pure metals from the water to use ...
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4answers
158 views

What effect would large tree eating animals have on the ecosystem? Would trees dissapear?

While wood is made up of the same carbohydrates called cellulose, wood is held together by a complex molecule called lignin. This makes wood tough and hard to digest as part of the cellulose remains ...
4
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1answer
71 views

Will my cyber-kraken fry itself with these electromagnetic powers?

I'm currently building a kraken for one of my worlds and wanted it to be a threat to my more tech-savvy protagonists. So, I want to give it some cybernetics. In particular, I want it to be able to ...
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8answers
3k views

How would WW2-level navy deal with my "merfolk"?

The abovementioned fictional race aren't exactly merpeople from fantasy, but I call them like that just for the sake of convenience. Rather, they're semi-aquatic humanoids, who are really good at ...
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4answers
165 views

Suburban areas for megacities?

Lately I have been looking into the concept of megalopolises across several works of fiction and futurology, and I have also been wondering wether or not it would make sense for such urban sprawls to ...
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3answers
129 views

What sort of geopolitical environment would sustain generations of legendary warriors fighting battles everyday?

Background Fans of power metal band "Gloryhammer" might have already recognized from the title of this question that I'm talking about Knights of Crail as described in a song "Hail to ...
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1answer
167 views

do these living expenses make sense compared to the costs of the products?

I have used parts of DnD and Pathfinder but I think that the numbers are out of whack. I know that coins were rare in the middle ages but I am talking about the value of items compared to one another. ...
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3answers
132 views

Motility as Sexual Dimorphism

I was playing around with my planimal idea when it occurred to me that my world could reinvent fish if I simply tweaked the starting point then applied neoteny (i.e., if they grew to maturity while ...
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1answer
106 views

Evaluate whether or not my country concept is realistic

One country in my setting is essentially a bunch of micronations similar to German states during the Kleinstaaterei period - a set of hyper-fragmented, heavily (if non-ethnically) Balkanized, near-...
5
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2answers
94 views

Reproduction via male gonad transfer

A major issue for many earth species is finding a mate when you need one. This problem is particularly acute for species that live in sparse environments (e.g., deep sea benthic zone) and those that ...
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3answers
72 views

Science of attack mechanics [closed]

My alien creature has ability to manipulate oceans enmasse without any magic ,no technology but only a biological method like powerful magnetic field how could it work? what materials is it ...
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3answers
114 views

Plausibility of super powers - conversion of kinetic energy to chemical energy in a body of a creature

My character has ability to absorb and convert kinetic energy of punches ,or anything but only kinetic energy absorbing and convert that into chemical energy .Is this possible in this real world ? ...
2
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1answer
69 views

Is there any possible way for pyrokinesis to have some kind of scientific grounding? [duplicate]

Im currently pondering the idea of a world where pills can be taken to grant temporary pyrokinesis as results of government experimentation. Is this scientifically plausible in the slightest? I know ...
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2answers
82 views

Biological furnace

My organism evolved to burn anything .But it is basically a biological furnace .IT works by incinerating anymatter within it .It could vent emit smoke from its vents like openings .But what could ...
14
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3answers
296 views

A semi-plausible planimal?

Ok, I know the rather annoying mathematics of animals that rely on photosynthesis. But another question got me thinking about this and I had a thought: what if my planimal gets only some of its energy ...
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1answer
101 views

Attack mechanism [closed]

My creature attack was basically generated by releasing a stream of super-cooled and super-heated air at the same time which, when they interact with the addition of a strong gust of wind, generates a ...
2
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2answers
83 views

ATGMs firing smaller missiles to trick active protection system, could it work?

I have a military that needs to get around tanks Active Protection System. (APS). The idea is to have a anti-tank guided missile fire smaller missiles when the big missile gets close to a target. So ...
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2answers
208 views

Covid-19 disappears, how long would it take to notice?

Covid-19; We all know what that is, a contagious pandemic that has caused an immense amount of loss and devastation and has effected tons of people all over the world You are chilling in your cozy ...
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3answers
106 views

Would gauntlets with claws be an effective weapon?

I am coming up with a kind of weapon a supervillain builds himself with fairly modern materials/tech. He uses it as a weapon, but also as a device for lacerating and torturing his victims. I’m ...
6
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6answers
335 views

Do they skip the steam engine?

My travellers are capable of in-system flight and have access to a single ship that they're going to use to move supplies from a moonbase to a pristine pseudo-Earth (a bit like this). They can ferry ...
4
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4answers
339 views

How could a medieval person drug someone to sleep?

My story takes place in a fantasy world with roughly medieval level technology (as is to be expected in that genre). One of my characters intends to spike someone's drink in order to make them fall ...
5
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1answer
94 views

How many habitable planets could our radio signals reach?

Taking into account signal attenuation. If there was anyone there to hear them. Only considering those signals already produced by us on Earth. Assuming the technology we have right now is available ...
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2answers
113 views

Will the management class disappear soon? [closed]

Do you see the management class, in companies, public organizations, politics, all kind of institutions be eradicated and disappear soon ?
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13answers
5k views

How long will it take for a medieval human to adapt to our current world?

Meet Henry, he is a sharp and quick-witted rich young adult from the High Medieval Ages(1000-1347). He can be described as someone with decent adaptability skills, though not much He found a time-...
2
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3answers
124 views

In what emergency scenario would portable backup organs be useful?

Most people seem pretty excited over the idea of artificial blood for infinite blood transfusions. Well allow me to present the concept for portable backup organs or P.B.O for short, because you ...
4
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1answer
53 views

Can electrosynthetic aliens function in this way?

Ok, so I've been running this idea for an alien biosphere through my head for a while now, but i'm debating how plasuable I can make this. Starting from the base, these are sedentary autotrophs living ...
4
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2answers
101 views

Would this idea for "extreme" VR work?

Bob has just invented a fantastic device which, in a nutshell, can apply forces to the fluids in the inner ear. Immediately, he wondered what would happen if he paired this with a VR rig. If a person ...
13
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12answers
3k views

Could an Earth-like world use airships as heavy cargo haulers?

I'd like to have freights transported across my world by airship heavy cargo haulers with some passenger variants as well. Imagine the scene with such airships soaring above the land, floating ...
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2answers
93 views

Could whale-sized creatures propel themselves through the sea by expelling water like a cephalopod?

It's incredible that 80-120 ton animals like blue whales can even swim, though water physics helps them in that regard. This got me wondering if a squids method of propelling itself through water ...
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1answer
78 views

Viability of a jet modelled after a dragonfly?

Insects in the order Odonata have tow pairs of wings that can be moved independently, their compound eyes grand them full 360° vision and their bodies are elongated. They can flap their wings out of ...
1
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1answer
90 views

Would 6 Earths Separated by 60 Degrees Have Day-Night Cycles?

This picture is taken from one of Sean Raymond's Planet Planet articles, Cohorts of co-orbital planets. What the article doesn't explain, however, is the basis for the question. In a solar system in ...
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2answers
69 views

Triassic crocodile alternative [closed]

During the Triassic period there were many different varieties of crocodile related species. The dinosaurs weren't as prominent until after a poorly understood extinct event. If this event hadn't ...
1
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1answer
44 views

Hycean world life questions

https://www.space.com/amp/new-class-habitable-exoplanets-hycean-worlds Hycean worlds are planets 2.5 the size of Earth with huge oceans and lots of hydrogen in their atmosphere. They're probably ...
3
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4answers
116 views

Is it feasible to have a nose prosthetic that doubles as a weapon?

I am thinking of something similar to the way a tactical walking cane is designed, where the handle of the cane can be pulled out to reveal a blade on the other side of the handle. What I am wondering ...
4
votes
3answers
128 views

Could an organism evolve photosynthesis using internal microscopic structures instead of using pigments?

I understand that most animals that look blue don't have blue pigment but instead have microscopic structures that scatter blue light. I was wondering if it would be possible for an organism to ...
2
votes
2answers
168 views

Could this method of controlling the number of children people have work?

Could this method of controlling the number of children people have work? The way this works is that everyone born in the country gets 1 "ticket". Each ticket allows for someone to have one ...
2
votes
1answer
122 views

How realistic is finding ore veins in natural caves?

I used to play World of Warcraft and a few other MMOs for their crafting systems and always wondered what a fantasy RPG with a crafting system would look like with a more realistic distribution of ...
7
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7answers
2k views

Would the successful creation of nuclear powered bombers in the 1950s have had any meaningful impact on the Cold War?

As far as I am aware nuclear powered bombers were the first attempt by the USSR and USA (either unintentional or not) at enhanced nuclear deterrence. Intending to place a nuclear reactor in a plane ...
1
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1answer
124 views

Why a dromaeosaurid would evolve to lose its legs? (to become an Quetzalcoatl/Amphithere)

An amphithere is a dragon from some European mythologies is described as a feathered snake, long body and wings with feathers, so basically can be stretchily compared with some Quetzalcoatl ...
2
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1answer
53 views

Viability of polycephalia, but the extra heads aren't intelligent?

Based on the existance of animals which born with extra heads as the form of parasite twins and the difficulty of justify multiple heads creatures. I was thinking that a possible way to get them as ...
5
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5answers
792 views

All the crew of an airship drop dead, how long does it remain airborne?

I’m currently working on a scene for a book where the heroes stumble across a seemingly abandoned Age of sail airship. After a brief investigation they find that the entire crew seems to have ...
12
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4answers
2k views

Can an average seagull fly with an average-sized(6 inch) action-figure on its back?

Right off the bat, the world/setting that this takes place in is not the pinnacle of realistic, but I do want to have a bit of realism. Anyway, so in this story, really more of an idea,there is an ...
2
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3answers
105 views

Is the orbit of this comet realistic?

I would like to know if the orbit behaviour of this comet is realistic and if not what could be altered to make it so. The setting: The solar system The system is quite similar to our own A single G-...
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1answer
105 views

Core= equals soul= after life is biologically possible

TL:DR Eternals don't die, but if they die they steal the body of another animal Humans are split into demons and eternals. Demons die once, for good, no return, they are souless bodies born to ...

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