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[Question] [ The whole 'prejudice against mutants with powers' thing has been done to death, most notably with X-men. However, I always felt that it was too over the top, the blind hate being excessive and no attempt was made to justify it. The point is sort of lost if the ones who are bigoted are so over the top vil...
[Question] [ Let's suppose that after seeing aliens get portrayed negatively in science fiction and wishing to end the discrimination, the ancient H'andh'wh'a'vians decide to destroy Earth and humanity. As they are a Tier-U-uber-civilization, they decide to just spawn a sphere of Uranium-235 in a circular equatorial ...
[Question] [ How could an Earth-like tidally locked planet with no Moon have a bright and livable night sky? The bluish night sky should look like this: [![Image of bluish night sky.](https://i.stack.imgur.com/IVbjO.jpg)](https://i.stack.imgur.com/IVbjO.jpg) But it should be 1% as bright as Earth's day sky and provid...
[Question] [ I'm making a map for my friend - I drew a pretty neat cartographic grid with a proper map projection - and then he reminded me that his world is actually an inverted Earth with a glowing ball of concentrated magic in the middle. The sun is half black, so it creates day/night cycle by rotating. Now, the q...
[Question] [ This question considers the respiratory apparatus of [an aquatic (or amphibious) species descended from engineered humans](https://worldbuilding.stackexchange.com/questions/91897/why-might-it-be-desirable-to-engineer-aquatic-humans). The history of the species provides a relevant constraint. While the sc...
[Question] [ OK, so you've got an empire in space. And that empire has a frontier. Now on Earth, we have many ways to defend a frontier. We can build border fences or even walls, we can build watch towers, and of course we can let people patrol; given that the border is just a line, patrolling is quite efficient. How...
[Question] [ I am writing a short story about a fighter pilot on Venus, I was advised on my other post to break up the post into multiple others. What are viable methods to power a fixed-wing aircraft in the upper Venusian atmosphere as it exists right now (i.e. not terraformed)? Given that these aircraft would have ...
[Question] [ So this is an issue I have been thinking about for a while. Both in the fantasy world I'm making and in many examples of fantasy media magic users are able to bring in new amounts of physical matter into the world. For example ice wizards in Warcraft launch shards of ice out of thin air to attack enemies...
[Question] [ I would like to have a city sitting on top of a large iron deposit that will be mined by the inhabitants of the city. Is that feasible for them? Won't the city collapse under the mines? Are there some other issues I should be aware of? [Answer] There are cities with extensive mining operations below t...
[Question] [ On my world a jellyfish type of animal exists, it's an aquatic animal of course and extremely dangerous as it consumes anything organic it touches. It's thin and wide, like a fleshy transparent blanket, not fast at all depending on the currents to go from one spot to another, mostly it just floats about....
[Question] [ While rewatching the first episode of Stargate SG-1, I realized again, that it might not be a good idea to put your secret portal to other planets right under your central air command bunker. The Problem An attack through the stargate could not only give the invading aliens a defendable beachhead. It...
[Question] [ I am writing the lore for a currently in-development open-world freediving adventure game and am stuck with trying to keep some things scientifically founded. Overall the game style is closer to realistic than to stylized or cartoony (it's a 2.5D game to make this feasible in a small studio) and the lore...
[Question] [ Closed. This question is [off-topic](/help/closed-questions). It is not currently accepting answers. --- You are asking questions about a story set in a world instead of about building a world. For more information, see [Why is my question "Too Story Based" and how do I get it opened?](https://w...
[Question] [ Monster Slayer Stan, we are in dire need of your help! The caves in our nearby mountain are filling up with a [dense but non-toxic gas](https://en.wikipedia.org/wiki/Argon) that is protecting a monster's nest. The monsters are weak but are hiding deep in the caves. We need you to go in and destroy their ...
[Question] [ This question is connected to: [Fire Resistant Fauna](https://worldbuilding.stackexchange.com/questions/11180/fire-resistant-fauna) I've been pondering a short story concept where a scientific expedition discovered a planet with a huge amount of both free hydrogen and oxygen in the atmosphere. This is ca...
[Question] [ > > Pacing back and forth in the war room, vice president Biden carefully considered his options. The fate of the world was in his balance. Sweat condensed on his brow, and time was running short. He clenched his fist around the handle of the stone, ran forward, and cast it across the ice. > > > *"S...
[Question] [ The idea is that a population of beings have a superior claim over others for the privilege of oxygenated air in a city/large settlement. I wanted to make this work that the other residents in the city have less oxygen saturated air in the outskirts of the area where the tree or trees are located. **How ...
[Question] [ I want to ape Ming dynasty China for my setting. Key points are that there's a big empire, several centuries old, but hereditary transition of power is practically non-existent. Instead, the country's youth is taking imperial exams, and the ones with the best results can join the bureaucracy and serve in...
[Question] [ We know that light exerts pressure upon matter. I'm imagining a hallway where an intense light source on one end shines towards the other end. The goal is to have the beam of light exert so much pressure that a human being cannot enter (or reach the end of) the hallway. Of course, we only want to deter...
[Question] [ This question asks for hard science. All answers to this question should be backed up by equations, empirical evidence, scientific papers, other citations, etc. Answers that do not satisfy this requirement might be removed. See [the tag description](/tags/hard-science/info) for more information. Ther...
[Question] [ Closed. This question is [off-topic](/help/closed-questions). It is not currently accepting answers. --- You are asking questions about a story set in a world instead of about building a world. For more information, see [Why is my question "Too Story Based" and how do I get it opened?](https://w...
[Question] [ Imagine aliens dropped a small black hole (say, 1% of the moon's mass, so you wouldn't notice the difference in gravitation) into the sun (from the far side of the sun, so nobody on earth can see it). That small black hole would then, of course, start eating the sun, so that it eventually fails. Now my q...
[Question] [ So in many worlds, magic is a source of power that magic users can draw upon and "do stuff with" - make elemental effects (fire, cold, lightning), heal wounds, shield from arrows, light rooms, etc. The amount of power they can draw upon and the skill with which they can turn it into useful stuff is like ...
[Question] [ One of the features in my world is a crystal cave. The crystal is mined to be used as a source of electricity. I want this electricity to power up simple electric devices, some sort of light bulb. I don't want complex stuff, because this is set in a medieval world. What I imagine right now is the (long) ...
[Question] [ Suppose there's an island in the East Pacific, west of San Francisco and south of Alaska (see [Google Maps](https://www.google.com/maps/@37.7990033,-142.9829096,6z); there's nothing but ocean there). This island needs to be at least 4x the size of Manhattan, preferably larger. It's home to a diverse and ...
[Question] [ The [bonegrass](https://worldbuilding.stackexchange.com/questions/38354/how-often-must-carnivorous-grassland-eat) fields are full of other life, despite their dangers. Lots of insects, some birds, and even a handful of reptiles have adapted to the paralytic nature of the air in order to reap the rich rew...
[Question] [ After watching first Shrek, I got interested in one detail: Can you build a castle which is surrounded by lava, using medieval technology? For scope of this question: Imagine ultimate wealthy king/queen (resources are not a problem). This kingdom wants to build castle to treasure its wealth. What if ...
[Question] [ TL;DR: How would adults deal with super-powered, godlike teenagers? A little background: The gods have mortal avatars. They walk around as physical gods and generally head their religions, making sure that people know what they actually want, although certain gods do differ on this, making religion… c...
[Question] [ The stories of the miracles of Jesus have survived 2000 years through written records by multiple witnesses. These records were compiled into a collection called "The Bible", which has been reproduced more than any other book on the planet. Early reproduction theoretically makes modification less possibl...
[Question] [ Most science fiction stories has humans building large domes on the surface of planets like Mars or the Moon. But wouldn't it make more logistical sense to dig down and build down into the planet? I could see needing some dome space for human psychology so everyone wouldn't become agoraphobic but wouldn'...
[Question] [ There are quite a few known [drawbacks](http://en.wikipedia.org/wiki/Inbreeding) to [incest.](http://en.wikipedia.org/wiki/Incest#Animals) However, [incest can be helpful](http://www.dogbreedinfo.com/inbreeding.htm) when trying to help a desired trait spread. Incest does happen in nature to some degree b...
[Question] [ I'm currently working on my own world and something I always wonder when worldbuilding is if I'm putting in "too much detail". One of my favourite parts (and one of the most important in general) of worldbuilding is details. Sometimes, however, it seems like I'm putting in "too much" detail. For example,...
[Question] [ In the world I am building I wanted to design a race on a planet which get more full the more calories they eat and then stopping when they have had their daily caloric requirement. I have an idea's on how they would do it physically (sample parts of the food going down their esophagus equivalent and est...
[Question] [ This question asks for hard science. All answers to this question should be backed up by equations, empirical evidence, scientific papers, other citations, etc. Answers that do not satisfy this requirement might be removed. See [the tag description](/tags/hard-science/info) for more information. I'm ...
[Question] [ Aside from very simple or colonial organisms, all animals on Earth have only one mouth for eating. Many organisms have multiple spiracles or even multiple anuses, but not mouths. [Answer] The problem isn't the anatomy or mechanics - life will find a way to make it work. The problem is figuring out a r...
[Question] [ I’ve been trying to answer this question for a premise involving a cyborg being out of touch with modern civilization for a prolonged period of time, and the roadblock I keep hitting is that counter to what cyberpunk fiction tends to subtly imply, we just don’t build our technology to last a lifetime any...
[Question] [ So I build a city on the ocean floor out of handwavium, Bioshock style, but I want an easier way to get there besides taking a boat to the middle of nowhere and then getting into a submersible. I have an idea to dig a shaft deep into the ocean floor, and then make a tunnel leading to a near-by island, a...
[Question] [ Assuming bronze age technology and the use of bronze for the blade, what is the longest blade / total length of sword that is possible and practical to use? Bronze age Naue II swords were typically 70cm but I am wondering if a longer (1.2m +) sword is actually practical, both in terms of weight and stren...
[Question] [ This question asks for hard science. All answers to this question should be backed up by equations, empirical evidence, scientific papers, other citations, etc. Answers that do not satisfy this requirement might be removed. See [the tag description](/tags/hard-science/info) for more information. Imag...
[Question] [ Watching modern Hollywood movies, one would think covert ops agents (especially women) all wear some sort of skintight latex or leather uniform when they're on some mission to sneak around. I highly doubt that is actually what an agent would wear when sneaking into some top secret facility, it seems mo...
[Question] [ If our hands had 2 thumbs and 3 fingers how would they work? I mainly concerned with the bones and how they would interfere and interact with each other. But the muscle work would be helpful as well. [Answer] As far as anatomy goes, it would look about like this: [![enter image description here](https...
[Question] [ I apologise if this is rather vague but I'm struggling with creating a concept that would allow a Victorian (steampunk) civilisation to have antigravity ships and floating islands through the use of a mined crystal resource. However I also want it to have other effects without making it seem ...
[Question] [ A street performer in the medieval age could make some money. One popular performer is a fire eater. Changing the color of his flames would likely make his popularity rise so that he would make more money. Is it possible to change the color of a flame? [Answer] You can't get black While it is poss...
[Question] [ So I'm the head honcho of a near-future dystopian totalitarian nation. I want to suppress intellectualism and rational thought, but at the same time I want to stay on top of scientific and technological development. Where and how am I going to find the talent? Details about the setting: * Technology is a...
[Question] [ With relatively current technology (i.e. no force shields, etc) what are ways to protect a spaceship (or at least mitigate the amount of damage) against hypervelocity kinetic projectiles? I'm a retired HS history teacher with a limited knowledge of science, so, be kind... I'm thinking: * whipple shields ...
[Question] [ Since the discovery of L’Anse aux Meadows in Newfoundland in 1960, the picture began to emerge that the Norse (I hesitate to say "viking" because that is a verb, not a noun) beat Christopher Columbus in discovering North America by up to half a millennium. However, L'Anse aux Meadows was not a long-term ...
[Question] [ I am trying to make a fake metric-time app to prank some friends when we take a trip to Canada soon and would like to know how I could make this work conceptually. I already know that the time is already considered "metric", but for this prank to work, the prank-ee must believe that it is not. So, if we ...
[Question] [ Suppose all of technology in existence disappeared overnight, except for the clothes everyone is wearing. No houses, man-made structures of any kind, just the land as it was say 60,000 years ago. All of our technology is gone, but everyone retains their knowledge. People know how to make a fire, the cont...
[Question] [ What would battle tactics look like outside the scientific research stations? * Year: 2100ish * Mars: Two 'surface,' permanent scientific research colonies with a little over 100 scientists and engineers in each with an additional support crew (geologist, psychologist & medical, etc.) to abou...
[Question] [ In one of my settings, the people have domesticated the wild raspberry plant, and selectively bred it for larger and larger berries. Would it be plausible for these berries to reach the sizes of apples (or larger), or would this not be possible due to things like the biology of raspberry plants/soil rich...
[Question] [ I'm designing a creature that is supposed to be able to eat "basically anything", within the realm of plausibility for what is essentially an organic creature. Its digestive system can be as complicated as necessary, and evolutionary history is not an obstacle, the creature could be either alien or engin...
[Question] [ In a scenario I'm thinking of, the Earth has been nuked bare and a few remnants of humanity are surviving in their underground bunkers. Let's say there is one in North America, one in Central American, and one in South America, then one or two in Europe, four in Africa, I could go on, but I think this is...
[Question] [ So, on a previous question of mine, someone answered [that it would be feasible to build a city on a waterborne floating island using a pumice layer below the ground](https://worldbuilding.stackexchange.com/questions/64252/ferrying-an-island-with-mortals-on-top-is-it-possible-without-killing-them). That ...
[Question] [ I've recently been reading a lot of utopian/dystopian fiction, and quite a few of them (e.g. Thomas More's Utopia) has this idea that people shouldn't be ruled over by laws that they can't understand. That is, the average person should be able to understand the law to the point of defending themselves ...
[Question] [ In our world, nomadism disappeared in most temperate and some semi arid climates after the agricultural revolution. But could it have survived? Start: * Nomadic people living in a large area. Other nations are living on the same continent, including other nomads but also several well established sta...
[Question] [ I have a character who lives on the outskirts of a large empire and he has to travel to the capital. By horseback, how far could my character realistically travel in a day? How far could he travel in two weeks on average? What if he had a dozen men traveling with him? On the outskirts of the empire it is...
[Question] [ Let's say two super-intelligent, self-improving AIs have, for whatever reason, decided "THERE CAN ONLY BE ONE!", and are now trying to kill/delete each other. How would they conceivably go about doing this? And I don't mean like in the Avengers with the Vision and his "I'M EXORCISING ULTRON FROM THE INTE...
[Question] [ The use of poisons (often assumed to be in liquid form) on knives and other melee weapons, often by stealthy or roguish characters, is a classical fantasy trope. However, some have said it to be of questionable practicality due to the weapon not staying in the wound long enough to deliver a lethal dose o...
[Question] [ Most fantasy worlds have large creatures living in a world with humans and other races. In Tamriel, the province of Skyrim has giants, mammoth and even dragons roaming freely. The Lord of the ring have oliphants and ents. In dungeon and dragon, there is the tarasque and all sort of other gigantic creatur...
[Question] [ This is for a video game project. In a future where living in the Earth's surface has become undesirable. People are building colonies in Earth's orbit. If materials from Earth are used to build space ships or space colonies, aren't we killing Earth? Those materials stay in space, they never return to Ea...
[Question] [ I have a creature in mind that has almost no ability to turn its head left/right and has forward-facing eyes like primates and predators generally do. This would generally present a problem for a creature regarding anything sneaking up on it, but this animal species has developed a workaround and that is...
[Question] [ A race in my novel have hollow bones to allow for flight. The character that belongs to this race is a warrior. It would be very easy to break bones simply by punching a fighter of this race. Is there anything I should focus on when designing her armour? Anything different to normal? [Answer] Traditi...
[Question] [ As part of a project, I am exploring a fictional biological/chemical weapon that can rapidly (and indiscriminately) kill by way of petrification. To clarify, By petrification, I’m not necessarily talking about the slow process of turning organic matter into fossils. I’m interested in conditions, diseases...
[Question] [ One commonly cited problem with invulnerability-style immortality is that you watch the people around you wither and die while you survive. On top of that, even though you don't deteriorate, at some point you run into mental issues, where you can't make new memories and life starts to become a blur. With...
[Question] [ So imagine this scenario: Sapience (which I define as Human-like intelligence or better) is a relatively common occurence once a life-form is on a specific brain-arms-race path like Hominins have been for a few million years. A certain set of mutations can occur that make a dramatic difference in overall...
[Question] [ I found a previous question on using chitin from giant insects to make weapons and armor, but the answer left out something I had considered for the medieval fantasy setting I'm developing. The answer suggested that the chitin pieces would not likely fit the shape of a humanoid race and would need to be ...
[Question] [ According to several [sources](https://www.scientificamerican.com/article/small-animals-live-in-a-slow-motion-world/), all organisms process information at different rates - to a fly, the world is in slow motion (relative to humans), for instance, but to a pigeon, the world may move faster. If the abilit...
[Question] [ What would be the possible and definite effects of two galaxies colliding with each other? (Milky Way & Andromeda) Long-term and short-term effects are both important. I'd like to know because it's planned to happen in the future of the story. [![Two galaxies shown near each other](https://i.stack.imgur....
[Question] [ I have an idea for a location in my world that I would like explained by natural phenomena rather than magic if at all possible. I would like to have a temple...that floats. The specifics: * The temple (and the ground it rests on) floats at least 18 inches (46 centimeters) and no more than 5 feet (1....
[Question] [ During a brainstorm session the idea of the ruler of a maritime empire sitting upon a throne made from worked salt came to me. Before I break out the handwavium there is something that I would like know: Is salt a workable material? If melted down could salt be worked into various useful or at least aes...
[Question] [ I have a basic idea for a world that I am fleshing out. Basically a dystopian future based on minimal, if any, resource scarcity. This sort of society was addressed humorously in a Cracked After Hours video, but was also touched on in The Matrix (originally the matrix was free of scarcity) and the experi...
[Question] [ In real world, it is commonly thought that gold is the most valuable, then silver, then bronze (which is an alloy), etc. But it happens that uranium is more expensive than gold, even if there were no uranium coins ever. Platium also is more expensive than gold. Moreover, during History gold has not alway...
[Question] [ Closed. This question is [off-topic](/help/closed-questions). It is not currently accepting answers. --- You are asking questions about a story set in a world instead of about building a world. For more information, see [Why is my question "Too Story Based" and how do I get it opened?](https://w...
[Question] [ This question already has answers here: [Styles of Melee Combat developed in microgravity](/questions/45891/styles-of-melee-combat-developed-in-microgravity) (9 answers) Closed 5 years ago. How would your design a martial art for use in either zero gravity (in space) or lower gravity (on anoth...
[Question] [ This question asks for hard science. All answers to this question should be backed up by equations, empirical evidence, scientific papers, other citations, etc. Answers that do not satisfy this requirement might be removed. See [the tag description](/tags/hard-science/info) for more information. Insp...
[Question] [ So I've been trying to create a world and I've been planning on the continents being drowned out almost completely in water from a terrible tsunami, storm, earthquake or an act of one the gods or something, maybe a mixture even. The land before would have very deep valleys and would be close to sea leve...
[Question] [ The world has come to regularly use genetic modification for cosmetic purposes, hair colour, eye colour, height, etc, relatively useless stuff. A breakthrough has been made that has produced the first functionally useful genetic modification, one that extends the repair/regeneration ability of the liver ...
[Question] [ In the Middle Ages, it was necessary for a couple to have as many children as possible because many children died before reaching adult age. Much of this was due to rampant disease and lack of medical knowledge. In an alternate history, diseases are rare and easily curable through the use of magical herb...
[Question] [ I'm admiral general Aladeen, the beloved ruler of [Wadiya](https://en.wikipedia.org/wiki/The_Dictator_(2012_film)), who won the elections with 99.999% of the votes. Wadiya is sparsely populated country, very rich in mineral resources. We have one of the highest living standards in the world. Life is good...
[Question] [ In lots of science fiction works that visit other planets we are often introduced to intelligent plant based lifeforms, be they humanoid looking or potted plant looking. I'm curious as to what part of the plant has to evolve to gain sapient or near sapient intelligence. Eg, all mammals share an organ kno...
[Question] [ Closed. This question needs to be more [focused](/help/closed-questions). It is not currently accepting answers. --- Want to improve this question? Update the question so it focuses on one problem only by [editing this post](/posts/40002/edit). Closed 7 years ago. [Improve this question](/pos...
[Question] [ The [oldest known musical instruments](https://www.bbc.com/news/science-environment-18196349) are a set of bone and ivory flutes from around 42,000 years ago. Paleolithic tribesmen undoubtedly played these instruments gathered around the campfire, as an addition to storytelling or religious ceremonies. ...
[Question] [ The world in question is an Earth-sized planet with a deep global ocean and core of water-ice. Given the lack of an accessible sea floor to root oneself to, how would a complex free-floating organism function? How might nutrients enter the system? Is this sort of system plausible? [Answer] On [the moo...
[Question] [ A modern architect specialized in [low-energy houses](https://en.wikipedia.org/wiki/Low-energy_house) suddenly finds himself in the medieval times, say around the year 1000. Thinking about how to make a living and noticing how badly heat isolated the houses, even the castles, are at the time, he manages ...
[Question] [ Sure, land is expensive here in downtown Metropolis, but lots of cheap land to build on even a few dozen miles out, never mind in the backwoods, or in flyover agricultural lands that rich, self-important and sophisticated people like me scoff at. Then you have deserts, taigas, the arctic, shallow seas......
[Question] [ Closed. This question needs to be more [focused](/help/closed-questions). It is not currently accepting answers. --- Want to improve this question? Update the question so it focuses on one problem only by [editing this post](/posts/116342/edit). Closed 5 years ago. [Improve this question](/po...
[Question] [ I'm creating a species of humanoid creatures that live their entire life in couples. From birth to death, they are bound emotionally, they work together as if they were only one individual but they are actually two, and need each other to survive. For some reason they can't survive if they are more than...
[Question] [ Closed. This question is [off-topic](/help/closed-questions). It is not currently accepting answers. --- Closed 6 years ago. * This question does not appear to be about worldbuilding, within the scope defined in the [help center](https://worldbuilding.stackexchange.com/help). * You are aski...
[Question] [ It's easy enough to figure out how a species might evolve a third biological gender in general (e.g. some sort of asexual drones/workers, ala insects). But what I want to build is a system where the species evolved 3 "real" sexual genders, where all three take active part in sexual reproduction. What...
[Question] [ Two Earth-like planets collide at a (relatively slow) speed of about 1,000 kph. For all questions regarding the size and composition of these planets, just think about Earth - and these two planets are moving towards each other at the same speed. 1) First, they would begin to rip each other apart due to ...
[Question] [ My story premise is that a human expedition to Europa has happened and the travellers have tunnelled through the ice and formed a colony in the ocean. When they breached into the ocean, they discovered that the underside of the ice was covered by glowing organisms that - through further research, turned...
[Question] [ A certain evil genius wishes to create his own army of super-killers to wreak havoc. He has a base in the jungle, and wishes to make a super-predator that will defend him (not to replace the predator at the top of the food chain). What should be the characteristics of an animal that is **the ultima...
[Question] [ If you have played Eastern-style RPG's (role playing game, think Final Fantasy) your know they tend to have monsters of many types and sizes, some much larger, some smaller, some humanoid, some animal and some just bizarre. These games almost always have one character who is a martial artist, fighting wi...
[Question] [ Let's say scientists created a pill, that would satisfy our daily nutritional needs. It would have all vitamins needed, all calories, minerals - everything that a human body needs in order to function properly. The side effects are unknown. How much is this pill in the "fiction" section? Is it really pos...
[Question] [ Inspired by [a previous question on this site](https://worldbuilding.stackexchange.com/questions/7351/in-a-world-with-magic-who-would-govern/7361#7361). If magic were real (handwave - see 1) and in some way heritable, would it be likely [to become fixated](http://en.wikipedia.org/wiki/Fixation_%28populat...
[Question] [ While European Dragons are often described as bat-winged, there are many depictions showing otherwise. Some give them fins or sails, and others depict a structure never seen on a living animal This structure resembles a fin with many rays projecting down from a horizontal 'spine'. The rays also flare out...
[Question] [ Considering a world with Jackalopes. These half-rabbit half-antelope creatures stand a little over 2 feet long when fully grown and have horns like a deer growing 1 to 2 feet in length. Like deer, only grown males have horns, females and young don't. They all have superior musculature and bone structur...
[Question] [ Question: Could a planet contain all of its (vast) oceans underground? I imagined a planet with no surface oceans - and no water cycle above ground - but where life was still possible. My initial misgivings are: * The increased temperatures below the crust. * Any life must be able to get to the wat...
[Question] [ Consider the present day Earth. Now, through some event (magic, a giant maid with a vacuum cleaner, a disgruntled [alien did it](https://worldbuilding.meta.stackexchange.com/q/2171/29), ...), our planet is stripped of its atmosphere. Assume that this happens in such a way that other features of our p...
[Question] [ During the medieval era of our world, weapons were getting pretty complex, but then gunpowder become commonplace and warfare was reduced to pulling a trigger. During the later end of this period, semi-automatic crossbows were being designed and used by the Chinese. Could a ballistic weapon be designed in...

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