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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Fossil fuels production optimization

I'm sure that a jungle planet would probably have more fossil fuels than Earth, as there'd be a lot more organic carbon, which would get buried underground and converted into fossil fuels. We'd ...
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Binary lung and gill breathing system [duplicate]

With my animation, one of the protagonist's abilities is that she can grow gills that allow her to breathe underwater, while retaining most of her humanoid features, such as lungs to breathe on land. ...
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2answers
42 views

Would it be sensible for a kangoroo-like race with exceptional leaping capability to wear gliding suits for long distance transportation?

My world has this anthropomorphized kangaroo-like race with extraordinary leg-strength + durability that can get around by hopping incredible distances and heights if they so choose. However their ...
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2answers
525 views

Animals with biological radar

Organisms on earth have a wide variety of ways to detect the presence of other objects. Echolocation, electrolocation, vision, etc. One kind they're missing is detection based around bouncing ...
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2answers
60 views

Could a land-based creature use water as a weapon?

Would it be at all possible for a creature to generate or store water and expel it with enough force to repel enemies or hunt? I know there are already fish that do it (archer-fish) but I'm looking ...
11
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8answers
3k views

The Bean Gun. Is it plausible?

Ok, since I'm tHe BEaN dELiVerY mAn, I need an appropriate weapon. I want a (you guessed it) bean gun. I want something that could launch beans at a lethal speed. However, I don't want the ammo to ...
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2answers
353 views

The Toll of An Alien Invasion

In my story, Earth gets invaded by evil aliens. Good aliens provide troops, tech, etc. to fight off the evil aliens, and the invasion is fought off in a month and a half. Here are some major events in ...
2
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1answer
137 views

Would this giant rotating shotgun weapon be effective?

TL;DR; Just a random idea I had, but would a giant rotating shotgun-type weapon be effective? I had this crazy/stupid/possibly-been-done-before/very-dangerous/probably-all-of-the-above idea. I have ...
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0answers
23 views

Is it Possible to Have a Tropical Climate With a Summer Dry Season?

In my book series, the northern coast of one of my provinces is in the tropics and on the western side of its continent. However, because it is mountainous and on a relatively cold sea, I was thinking ...
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2answers
87 views

Could a Hydra take over the world? [closed]

Grim Ripper, a 10 story tall monster hydra which looks like a serpent with nine heads, the head in the middle being the biggest head. If one head is cut of, 2 more heads grow in it's place.The middle ...
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3answers
75 views

Justifiable reason to use a Submachine Gun in the post-apocalypse? [closed]

In my world, I planned on the use of SMGs (Submachine Guns) being common, with weapons like the H&K MP9, MAC-27, and UZI being most common. After doing some thinking though, I realized that in ...
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5answers
848 views

Making a modern day 9mm gun-glaive?

My inspiration and for easier imagining of this glaive-like weapon here is a picture from the Warhammer 40k universe of something very similar. (Picture courtesy of this site click to see larger ...
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1answer
579 views

Mountain inside a “crater” after a meteor impact?

A meteor crashes in a very geologically unstable region of an earth-like planet. A few years later, a person visiting that site will find the following features: A concave depression, of a circular (...
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3answers
192 views

Drop dead disease

Diseases kill people by messing up with some mechanism that is necessary for life. This generally means that they have a progression - for respiratory diseases, you will have difficulty breathing for ...
5
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5answers
419 views

Could the world function as “normal” if the rich, famous, and a certain percentage of each country left the planet? [closed]

My story is about a radio intern who is left in charge of the station after a few ships carrying a chunk of the Earth's population leave while claiming that the ships will be sent back for the rest of ...
3
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3answers
143 views

Possibility of detecting drug taking athletes in a 16 century setting?

The empire hates cheating and manipulation of honest trades or sports. There is an explosion of sports and athletic events and all that. So. They are very popular. Sports in general include stuff like:...
4
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1answer
68 views

Help with Pressure, Winds, Precipitation and Climate Zone

So I've decided to re-do my worlds winds with a more realistic approach. Honestly the entire process has overwhelmed me, so I need some help with certain things. This is the climate map map by itself. ...
4
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4answers
184 views

Minimum energy Kardashev scale

Other than the original Kardashev scale which ranks civilizations on the amount of energy they control, more specifically the energy from stars, I was intrigued by other more recent scales which take ...
7
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7answers
1k views

How to sustain this sedentary hunter-gatherer society?

There is this great and dangerous forest in this world, way more bioproductive than anywhere on earth. The climate is humid subtropical, with cold but not freezing winters. There is plenty of fruits, ...
35
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22answers
3k views

Can you have a Clarketech artifact that you can replicate but cannot comprehend?

Godlike-powerful ancient aliens have vanished from the galaxy for unknown reasons and left behind various artifacts. Millions of years later, lesser species had found these artifacts and discovered ...
7
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4answers
191 views

How could be a relatively “universal” eye?

In searching of a universal eye, I meant a photoreceptive organ which can have all/most of the best capacities of the known eyes. So, each type of eye or photoreceptive organ has a different function ...
4
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2answers
137 views

A functional fatalistic daredevil civilization in history?

I have been reading about fatalism: the belief that all events are predetermined and therefore inevitable. It made me consider designing a fictional civilization based around fatalism, but with the ...
11
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10answers
3k views

How to limit population growth in a utopia?

In my fictional nation, the government has figured out how to provide sufficient nutrition to the entire population indiscriminately. This leaves most citizens time to explore and develop technologies ...
9
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1answer
351 views
+100

Anatomically correct Quetzalcoatl

Quetzalcoatl is the main of the cultures from the center of Mexico, like mexicas, toltecas, teotihuacans and the maya equivalent Kukulkan, known by the popular culture as the feathered flying snake or ...
4
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6answers
2k views

Designing absolute sensory deprivation punishment, what am I missing?

Warning: Brutal concept coming up! The ultimate punishment in a setting of mine is a procedure known as The Emperor's Wrath. A person subject to that punishment undergoes the following: They have ...
5
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1answer
102 views

Reality Check: Sub-Dermal Armor / Dermal Armor

Multiple role playing games make use of sub-dermal or dermal armor. This includes fusing plates of material directly to the skin and implanting material below the derma. I see huge problems with all ...
8
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5answers
3k views

Would fire/heat powers be actually dangerous?

In a duel, one of the fighter is a fire mage who is capable of producing heat surges in a wave-like pattern. There are flames coming along with it, but it's purely for aethestics and has no physical ...
12
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9answers
3k views

Is an instrument that increases in loudness the farther away you get from it scientifically plausible?

Even though this is filed under the "reality-check" tag, I'm looking more for semi-plausible explanations as this is almost assuredly impossible using real world physics. In my world people ...
5
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2answers
97 views

Using Cellular DNA Reader to Counter Radiation Damage

I have a space based setting and would like to develop a mechanism that counters radiation damage. Here is my idea: The setting 100 years from now. A cellular organelle is developed similar to the ...
10
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3answers
151 views

Increasing Speed of Neural Transmission by Embedding Material in Myelin Sheaths

I am building a science fiction world 100+ in the future with various human augmetics. One of the things I would like to do is speed up human thought. My preferred mechanism for embedding this ...
18
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10answers
4k views

Using our current scientific theories, is it possible to develop better siege equipment than medieval ones? (Updated)

Sieges are not a mystery. Bribe someone to open the gate or starve them out are the popular options. And actual assaults are not very common. Sun Tzu would even advice to And the worst policy of all ...
5
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3answers
380 views

FTL Drive Reality Check

Inspired by this article, which refers to two other articles. (article 1) (article 2) These articles suggest that the permittivity of free space ($\epsilon_0$) might be adjustable by changing the ...
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0answers
20 views

sea dragon with scalding breath as a weapon [duplicate]

so my sea dragon is as large as a bottlenose dolphin (well it look like the lapras from Pokemon) and instead of breathing out fire, they have the ability to shoot out boiling water from its mouth? ...
4
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5answers
194 views

Designing a sea dragon with boiling water breath as a weapon

My sea dragon is as large as a bottlenose dolphin (it looks like Lapras from Pokemon, but that's not important) but instead of breathing out fire, it has the ability to expel boiling water from its ...
4
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2answers
91 views

How best to control the cost of iron and what it’s used for in my world?

I want to create a world where iron is still widely used, but is more expensive than on Earth. Small quantities would still be viable for wheel hub rings, swords, axes etc at a modest increase in cost ...
11
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6answers
4k views

Would a portable watchtower be useful for the premodern military?

Whenever one thinks of something new to introduce to war I always think: Yeah. They were smarter than you and more experienced. They had the ability to think of your basic idea and did not. Probably ...
3
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1answer
99 views

Can my preindustrial civilization control an artificial water flow on the scale of the Mississippi?

Extending some of my earlier questions How to stop a massive canal system from silting up? Roughly how much water would my desert civilization need every year? My preindustrial* society needs to ...
2
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2answers
127 views

How bad is my runaway fission reaction?

During WWII in an alternate universe, the nuclear bomb is being developed. Interestingly, radiation amounts are far higher than predicted when enriched. Unbeknownst to the scientists, highly enriched ...
2
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2answers
108 views

Would high-g travel require medical assistance?

I was reading about the "Osteo-X" and "the juice" from The Expanse series, and it got me wondering about my own setting. Would transportation services, say, from the moon and back, ...
21
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17answers
5k views

In the far future would weaponizing the sun or parts of it be possible?

Lets assume we are dealing with a futuristic setting set several thousand years in the future with major galactic empires controlling thousands of systems and producing all sort of things that we can ...
4
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1answer
101 views

Is it possible to make a solar system based on an existing solar system

I've been making a solar system for my story based off the Keplar-47 solar system as my story has 2 suns like this solar system and since its easier to write a system based off a real one then to ...
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1answer
100 views

I want an intelligence agency without modern means (UPDATED) [duplicate]

Short. Got it. Thank you to all those who provided answers before. Closed question. Points there will influence if your answer is helpful or not. I Want to make an intelligence agency in a fictional ...
5
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0answers
163 views

Plausible design/size of flying cities?

Setting The setting was a tropical, Mars-sized, ocean-covered world that has completely frozen over. Over the span of several years, the mean global temperature had dropped to below 200 Kelvin. Ice ...
5
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1answer
201 views

What kind of wounds would a pulsed laser weapon really create?

Lasers and other heat-based weapons in sci-fi are often misrepresented in how they deal damage. A common reaction to heat based weapons like lightsabers, laser rifles and plasmaweapons is to say they ...
8
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5answers
712 views

Coastal Ice Age Civilization- Dealing With Sea Level Changes

I have some isolated ice age civilizations in a setting I'm working on and there's one thing I'm not quite sure about; rapid sea level changes. Sea level during the last 10,000 years or so of the ice ...
8
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7answers
719 views

I want an intelligence agency without modern means

Short. Got it. Thank you to all those who provided answers before and explained how to fix the problem in the comments as well. I Want to make an intelligence agency in a fictional setting that only ...
12
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6answers
549 views

Species that can create magnetic fields

I am trying to come up with an explanation for how a creature could create strong magnetic fields with a high level of control. I'm thinking that their 'writing' would be similar to how computers ...
4
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3answers
211 views

How much can I expand human color perception by adding new photoreceptors?

Normally, the human retina contains four types of light-sensitive receptors (opsins): three types of cones and one type of rods. Receptors contain proteins-chromoproteins - iodopsin in rods, ...
6
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8answers
2k views

How practical is a spear-rapier (fencing foil) hybrid?

Recently got inspired by chinese wushu martial arts movies and I wanted to implement a little bit of what I saw into one of my fantasy worlds. The idea was to make a lightweight spear-rapier hybrid ...
29
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17answers
11k views

Why can't modern fighter aircraft shoot down second world war bombers?

It's September 1940, the Luftwaffe is launching the blitz over the UK. One squadron of night bombers (either Henkiel He 111 or Junkers Ju 88) is flying over the English Channel when they are somehow ...

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