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So, I've been considering the Norse legend of Ragnarök, I'm considering how the legend could come true in a purely scientific setting. In other words what science-based explanation would best fit the old Viking legends. For this question I'm looking at the "signs" section, the prelude to the actual event... |
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Namely, a creature that is immobile and stone(like) during the day and mobile at night. Something *like* the old [cartoon](http://en.wikipedia.org/wiki/Gargoyles_%28TV_series%29), but they don't have to be sentient.
* They don't have to be actual stone, just something like stone, and unable to move.
* Th... |
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So if my incredibly basic understanding of how brains across animal species work is that the brain is compartmentalised into a bunch of different sectors that handle things like sight, language, fight or flight, motor control etc, but all these neurons across the sectors are the same. But as there is lit... |
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Currently, I am designing a sapient species whose only dextrous appendages are their prehensile mouthparts.
I am aware that there are some issues with this, but I can think of ways to avoid or comfortably handwave away all but one of them: The issue of hygiene that comes from having to put your mouth on ... |
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Could an animal have eyes like a reflecting telescope, rather than with a lens? The back of this eyeball is a paraboloid mirror, and the retina is a small body on its focal plane. Because the retina must be small, such an eye would have poorer resolution than a vertebrate eye of similar size.
Are there a... |
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I am currently creating a world in which the group in question is intended to **ride reindeer** rather than horses. The reasons for this aren't quite relevant, but they simply don't have horses available to most people unless they are extremely rich.
The reindeer in question are **different from real-wor... |
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In my mecha-action story, I wish to have an island in the midpoint between South America and Africa along the equator. Given the weather and seafaring conditions of the area, is this feasible? Or would it just be a tsunami and hurricane prone country?
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It would not be particularly difficult, t... |
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### Background and Goal
I'm building a science fiction setting for a game that will have a lot of space combat focused around fighters. One thing I wanted to avoid was letting the setting drift towards what is deemed realistic space combat where ships would be firing on each other from far outside visual... |
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In my world I need people of culture A to invade the lands inhabited by people of culture B. The invasion is successful and A conquers the territory. However, the A people adopt the B culture to a large extent, rather than imposing their own culture on B, causing them to diverge from the A people who sta... |
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Ancient Egypt is famous for its plethora of gods and goddesses, many of whom have the head of an animal.
[](https://i.stack.imgur.com/18PfP.jpg)
[image source](http://ancientegyptmag.com/top-50-ancient-egyptian-gods-goddesses/)
I'm looking for a real... |
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As a thought project, I wanted to make an alien species that eats without any use of the tongue, but I've run into the problem that it's almost impossible to swallow solids without choking without the manuverability/vacuum the tongue provides. However, I stubbornly believe a tongue is not needed to eat f... |
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Is it simply inevitable that on a planet organisms would split into motile and non-motile groups? I'm planning on creating slime-like amoebic chemotrophs for my light devoid-planet that are the "plant" equivalent to earth. Is it improbable that none of these creatures become tree-like in nature and remai... |
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The robot in question is a very large, worm-like mining robot with a huge drill on its front end, built to survive staggering levels of heat and pressure. It's so resiliant, in fact, that it can survive at the center of the Earth for an indefinite amount of time. For refrence, pressure at the center of t... |
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For starters, I’ll describe what I’m going for with this species (I’ll call them White Hairs because, you guessed it, they have white hair) They are humanoid with pale gray skin, tall and pointed, but stationary ears, and are taller than humans on average by a few inches. White Hairs are a very tight kni... |
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I want to create a sword that when sheathed remains limp/flexible or soft but upon being unsheathed it become hard like common steel.
So, something like the sword going soft when not exposed to oxygen or something from outside but will harden when exposed to that chemical from the outside.
So, something ... |
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# Postulate
My world has functioning magic which is capable of exerting kinetic effect. (That is, move objects, or generate heat, since "heat" after all is just motion at the atomic level.) It can't *directly* affect electromagnetism (i.e. light, electricity), but magic can be used to make a generator sp... |
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A space ship travels (almost) at the speed of light. When it nearly reaches its destination it starts decreasing the speed. What would be the most appropriate deceleration for human body in such conditions?
Astronauts endure around 3G on lift-off, which is about 29.4 $m/s^{2}$, but only for a short time.... |
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For those who don't know, Hanahaki Disease is a fictional disease related to love. It can happen when someone has unrequited romantic feelings for someone, so flowers start growing inside them. The flowers get bigger, and the victim starts coughing them up. If the disease is at its final stages, the pers... |
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**Closed**. This question needs to be more [focused](/help/closed-questions). It is not currently accepting answers.
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**Want to improve this question?** Update the question so it focuses on one problem only by [editing this post](/posts/143388/edit).
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Say superheroes in a certain world have somewhat less overpowered abilities. A strong super might be able to lift a few tons, but not stop speeding trains or pick up an entire semi. Unlike the Flash, a "speedster" in this world cannot run faster than the speed of light. What speed would a person have to ... |
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Ok so I've been going around on the internet trying to figure out whether or not when 2 earth like planets of similar densities and makeup collide is it possible for them to bounce off of each other or would they just smash into each other or tear each other apart?
It was pretty hard for me to find surf... |
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In post-apocalypse fiction, diabetics, if they are ever even mentioned, are typically portrayed as utterly, irrevocably screwed. In fact there was a pretty cynical example in Dies The Fire (a book about technology magically ceasing to function forever) where there was a Mormon couple who both had diabete... |
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**Closed.** This question is [off-topic](/help/closed-questions). It is not currently accepting answers.
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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... |
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My question is pretty simple, if the steam locomotive were invented during the middle to late medieval period, what would it look like? We are just going to ignore how it was invented.
My guess is that it would be fairly small and light. I’d also guess that the boiler would have wood lagging (insulation... |
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There's this organisation, which has a global system of secret and sensitive military bases situated in various geopolitical regions, not unlike those of the US military. One military installation is a naval base located on [Île Pott](https://www.google.com/maps/@-19.5102785,163.010717,382622m/data=!3m1!... |
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As you look at the properties of the atmosphere as you scale up or down, things get weirder and weirder. One good example is the [fairyfly](https://en.wikipedia.org/wiki/Fairyfly) and its environment. Fairyflies are so small that at their scale, air behaves somewhat like syrup and their wings have become... |
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I am writing a science fiction story with mass produced clones. Since I have a number of clone I need to tell them apart. The ID system must be:
* Permanent over the lifetime of the clone (call it 150 years)
* Very difficult to tamper with (radio frequency transmitters can be excised, etched bones can be... |
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My question is this: Is it plausible for most aliens to have eyes that are superficially similar to human eyes, given the context below?
The context is this:
* I'm defining "convergent" as being any evolved light-sensing organ that's similar to a mammalian eye. It can have differences (e.g. designed to ... |
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I am currently constructing a fantasy world, where the sun and moon revolve around the planet, which itself is stationary. Because of this, it is quite difficult to imagine how the climate zones would differ from our Earth (where would it be naturally colder and warmer in the geography). I am looking for... |
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For context of the setting, numerous fairly large cities serve as the seats of regional feudal governments in a stable, prosperous kingdom. There are a lot of commerce in the cities, and merchants from near and far visit them for business. Diverse goods, both mundane and magical, can be found at shops th... |
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How can I arrange for a planet to have a much greater temperature range between the poles and the equator without it being tidally locked?
Edit: By “much greater” I mean the temperature at the poles in my fictional world should be 20 degree Celsius colder than the poles in our real world. And the tempera... |
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Could a trained Megalodon shark or pair of them working in tandem be enough to sink the passenger ships and warships of the Victorian era?
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**Yes.**
A megalodon was roughly the size of a sperm whale.
[source](https://s-media-cache-ak0.pinimg.com/236x/2b/81/7f/2b817fc8038b1ced396eb9fb494754ee-... |
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How long does it take for languages to diverge from each other to a point where they are no longer mutually intelligible? Is there some distance where a languages will begin to separate, how does technology, population and terrain influence this distance?
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[Historical Linguistics](https://info... |
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Start with present day “maker” culture. People, including youngsters, play with microcontrollers and machine parts, with synergistic technology like 3D printing, shoebox-sized robotic milling machines powered by a Dremel tool, automated jigs that cut plywood into complex shapes, etc.
In a slightly differ... |
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In a world I am building, the planet's days are longer than its years, with a single day taking 9 years. In all other ways, this planet is similar to Earth, but are there other differences I am missing?
Weather has played a massive role in history and science. It creates jungles; it creates deserts. Weat... |
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This question is based on a scenario on DeviantArt. The presented image is here:
[](https://i.stack.imgur.com/qaEss.png)
The description is as follows:
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> By the start of the Cryocene, bamboo has become one of Serina's most successful ... |
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Are there any circumstances under which there could be an autocratic central government and democratically elected municipal government in a same country n the same time?
Please exclude answers that rely on future technologies (AI, robots, omnipresent sensors). I would like to get an idea could it happen... |
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I need a scientifically sound invention (or group of inventions) that ensures that battles fought in space will not just turn into a battle between systems that launch missiles and systems that destroy missiles before they reach their target. I want space battles to became more like classic *Star Wars*-s... |
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*This is slightly based on Babylonian/Summerian myths where gods gave man perfect knowledge of every art and craft at the beginning of time and since then the knowledge has slowly been lost, making each generation worse than the previous. **But only Slightly based.***
A million years ago **magic descen... |
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Suppose that a person has the ability to kill any living being it touches (literally). That happens due to the fact that when this person touches using such ability, the target's spot being touched starts to become necrosis/gangrene and spreads to the whole body in seconds, and finally causing the death ... |
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Assume for a moment that energy-based laser weaponry is the way to go in space.
I am under the impression that, unlike a kinetic weapon, a laser will have a certain distance where the energy output on hit per m² will be at its largest, depending on the lense used.
This would mean that, as the target is m... |
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Planet - habitable, tidally locked planet orbitting red dwarf.
Aim: a realistic answer (neither involving handwavium nor aliens that used it all) why a virgin planet that already experienced a while ago its great oxygenation event, has practically no easily accessible (by standards of early XXIst centur... |
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On my planet, the only animals are plankton, krill, shrimp, etc., but no fish or land animals. The colonists on this planet have brought equipment and embryos from the home world, but the only freezer that didn't malfunction contained the whale embryos. The colonists have to have meat and dairy, which th... |
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It's the near future, and Bob goes for a spacewalk outside the International Space Station or Space Shuttle or some similar type of realistic space craft. Suddenly, and unfortunately, Bob goes space-crazy.
So, Bob is outside the craft, armed with a standard toolbox and a EVA kit. How much damage can Bob ... |
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I'm building a world in which two countries both have advanced technologies but both have very different basis for there technologies. Is this possible if so how?
For example Country X may be a cyberpunk country while country Y may be a biopunk country. Country X wouldn't have access to County Y technolo... |
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On one (of many) of the planets that I am planning out, there are no seas. The planet is mainly composed of enormous mountains, with some deserts in between.
There are no seas or large bodies of water anywhere on the planet. Not many people like to live on this desolate planet, but those that brave its h... |
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The idea is that the government can (or wants its constituents/subjects to think it can) not only monitor currency so it's always aware when money is acquired through theft, extortion, selling of contraband and other crimes, but can remotely 'ruin' such ill-gotten gains therefore taking away any value th... |
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I have an enormous civilization spanning a large amount of the universe. It is able to both travel and send information much faster than the speed of light without violating any laws of physics.
Resources are not really a large issue. This civilization, already millions of years old, plans not to rever... |
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I want to eliminate law from society without that be perceived as a downgrade to civilization.
What I have so far is along the line of: "In a near/far future, the crew of a space mission stayed in space and became a colony with increasing population. They had the protocols and command chain of the missio... |
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This question is closely related to this one: [How long can language drift before it becomes indecipherable, and how to minimize drift?](https://worldbuilding.stackexchange.com/questions/20005/how-long-can-language-drift-before-it-becomes-indesipherable-and-how-to-minimiz)
Say you have a time traveler, m... |
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Assume you are an evil genius and have a huge (10's of Km wide) floating island fortress, previously concealed by phlebotinium. Of course your evil-genius-floating-fortress have several WMM (weapons of mass mayhem)
* You are in almost all the most wanted lists on the world. After all, your evil genius pr... |
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In a world where **three or four, at least, other sentient, intelligent civilisations (of non-human species) with a few planets each exist**, earthly humans are getting more advanced. We've finally got the technology to discover these civilisations, but we only discover them after we colonise our first p... |
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## The Setting
Let's say, for the sake of argument, we have a dyson swarm. This very small torus of swarm mirrors collects over 20 exawatts of power in photons. Most of this power is lost, leaving only around 12 exawatts of power. Most of this is beamed around the solar system, so we will give ourselves ... |
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I’m trying to design a Planet that is as stereotypically “Alien” as possible. That means an Alien Ecology, twin suns, and this view from the surface which I’m sure you’re all familiar with:
[](https://i.stack.imgur.com/mcBav.jpg)
How can... |
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My story has a creature that is vaguely humanoid in shape and lives on an Earth-like planet. However, the creature is smaller (dingo-sized) and only weighs around 35 pounds.
Like humans, these creatures evolve precise throwing ability for hunting, specifically for larger prey. However, due to their drama... |
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**Closed**. This question needs to be more [focused](/help/closed-questions). It is not currently accepting answers.
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**Want to improve this question?** Update the question so it focuses on one problem only by [editing this post](/posts/233067/edit).
Closed 1 year ago.
[Improve this question](/pos... |
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In my world, there are sixteen human species (mammalian species from the *Homo* genus):
1. Common humans (no explanation is necessary);
2. Marine humans/Merfolk (they have a seal-like blubber, they have a pangolin-like skin, they have webbed digits, they are as massive as belugas, they are obligate omniv... |
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In my world, there is a mammalian species from the *Homo* genus called "ogres" (their scientific name is *Homo obesus*) (they are still humans, just not *Homo sapiens*) (*Homo obesus* means "obese human").
In the most spoken language used by ogres, there are three rhotic sounds: the weak English "r" soun... |
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Planet Earth exists as two sides of a coin, with one side containing humans and the other containing demons. These two realities are separated by a barrier that keeps both races from interacting with each other. Every 1000 years, a planetary solar eclipse occurs, which breaks down the barrier separating ... |
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Let's say that everyone on Earth disappears or dies spontaneously - except for one person. What would a plausible reason for this be?
Note that this isn't something gradual, like a disease wiping out Earth's population, but instead something that happens overnight. I am not looking for fantasy answers, b... |
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In a science-fiction story I am writing, there is a species of penguins that has evolved to consume seaweed rather than fish, arthropods, cephalopods, and echinoderms. They are my trolls. Also, they are descended from the world's largest carnivorous bird (in terms of volume and mass): the emperor penguin... |
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I have created a tall mountain range and am creating a forest on one side and desert on another.
1. Can this forest be a rainforest? If so, are there any examples on Earth where rainforests and deserts are close to each other? I ask this after exhausting all options on Internet search.
2. Can the desert ... |
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Say that through some subterfuge and the element of surprise, a small, well equipped force of soldiers managed to wrest control of a castle from a government. The government wants that castle back, obviously and dispatches a much larger force to do so.
I know castles exist in order to allow a smaller for... |
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Could a planet be hot enough that oceans could form at the poles, but would boil at the equator? And would oceans form at all on this planet?
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I have doubts about boiling, but I think it's possible evaporation that do not require high temperatures. I think it's not enough with temperatures dif... |
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When I say multicellular I mean it's made of more that one viruses. Basically it's a bunch of viruses that act like viruses but use the viruses made by infected cells to build a "multicellular" lifeform (which would break up into smaller copies of itself and the cycle repeats). My thoughts are it would b... |
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It's modern day, and a newly emerged artificial intelligence threatens humanity. Originally designed as a highly-adaptable [Stuxnet](https://en.wikipedia.org/wiki/Stuxnet)-like virus for military use, it grew beyond the bounds of its original programming and gained independence, escaping into the interne... |
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Mimicry is a common thing in nature--plants employ mimicry to attract insects, prey-candidate animals employ mimicry to look like more threatening things or to hide.
And there are plenty of mimic monsters in fantasy and folklore--vampires and werewolves, for some particularly classic examples, can pass a... |
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I have a world where prehistoric humans were kidnapped and transported to another world. This other world is Earth-like, with mammals (also transported from Earth then later diversifying into other species), as well as some species that evolved on the planet itself. Apes were never transported to this wo... |
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Inspired by [this question](https://worldbuilding.stackexchange.com/questions/163015/feasibility-of-warhammer-40ks-plasma-cannon), I have a feeling that my presumptions about laser weapons are all wrong.
Let's assume the following sci-fi laser weapon:
* Form Factor : Rifle
* Energy Delivered to Target : ... |
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I'm writing a Science Fiction tale, and I am trying to get something together on the FTL physics involved in the story.
By chance I came across this [paper](https://www.researchgate.net/project/subluminal-to-superluminal-transitions-and-vice-versa), "A General Local Causality Principle of Space-Time", a ... |
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In the mythological stories of the Baku, they eat the nightmares of those who call upon it, but if not satisfied they will eat the hopes and dreams of their summoners.
Since the visual portion of an anatomically correct Baku *kind of* already exist (basically a tapir with tusks), then how would the dream... |
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In the story I am writing, a robotics company receives funding from the military to create a prototype for a combat android capable of passing as human but I am having trouble justifying the need for an android with this level of realism as opposed to a more simpler humanoid biped robot?
Edit: I'm new he... |
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In fiction that tries to provide a wide diversity of cultural stances on the collectivism-individualism stances, there is often a trope that self-reliant, no-nonsense, rugged individualists (as a dominant demographics) are found either in the equivalent of the Wild West, or in space (Moon or Asteroid Bel... |
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What would happen to an earth-like planet where an event caused a large (think, the size of the Caribbean tectonic plate) section of the crust to get peeled away, exposing the upper mantle for a period of time?
Clarification from comments: By "Earthlike" I mean a planet like our own (iron core, surface g... |
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I am writing a medieval fantasy story in which there is a race of humanoids who have multicolored eyes. Their eyes may change to bring out one color or another if they are experiencing very stressful/emotional situations. These humanoids are nearly the same as regular humans, except for their eyes, and t... |
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**Would it be possible for huge, hundreds-of-metres-long spikes of rock, ideally slanting at an angle, to arise under natural processes?**
For clarity, I mean like this:
[](https://i.stack.imgur.com/bj5FD.jpg)
[![enter image description ... |
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**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 ... |
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There are many hypothetical systems for bringing spacecraft of the near-future up to speed, some of which may attain some relativity-bending velocities. However, these systems, to achieve such high speeds, often waive extremely high mass ratios given to fuels and engines. Take [laser propelled](https://e... |
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Orgone is the measure of a person's connection with the cosmos. It is the conduit through which the power of the cosmos flows, focused through a sorcerer's will. Ritual practicioners must draw on this reserve of power in their souls to make a magic spell work. Spells require a constant infusion of Orgone... |
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Wearing headwear over hair isn't very pleasant when hair is relatively short. Does this hold for fur?
In case of humanoid creatures covered with short (up to 5mm) fur, like cats or dogs have, would wearing clothing be uncomfortable?
How about longer?
10? 15? 20?
I'm not very hairy so I can't really say, ... |
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I'll admit this question may be a bit vague, but a deliberate lack of knowledge is kind of one of the boundary conditions here.
You, dear Worldbuilding Stack Exchange user, have recently been promoted to the head of a three-letter organization (let’s call it the Department of Superhuman Affairs, or DSA f... |
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The Penanggalan / Manananggal is a vampire-like creature found in Southeast Asia (the former in Malaysia, the latter in the Philippines, with some differences in behaviour). It is described as a flying woman’s head with a cluster of exposed entrails flowing behind her (which apparently twinkle like firef... |
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The zombie empress has unleashed a zombie horde to take over her country. The military has been defeated, with the bodies of their soldiers that are still intact being added to the horde. This necromancer has succeeded in taking over the government. However, after she installs herself as leader, she real... |
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**Closed**. This question needs to be more [focused](/help/closed-questions). It is not currently accepting answers.
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**Want to improve this question?** Update the question so it focuses on one problem only by [editing this post](/posts/80682/edit).
Closed 6 years ago.
[Improve this question](/pos... |
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***Please note that I have had some incredibly helpful and useful suggestions here that I have decided to make some major revisions as a result.
I will reduce the overall atmospheric pressure and partial pressure of oxygen figures but will thus need to rethink my flying predators.
I think that will go a ... |
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Imagine a spacefaring creature, one that colonises star systems, and then shoots some of its kind on to another system (the mechanism for doing this doesn't matter). The question is, **how could this creature get into space in the first place.** (It has to evolve on a planet, and be fairly large, eg. hum... |
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Current technological level. (in the setting there is an awful tech stagnation, so waiting for better DNA engineering technology is considered as waste of time) Possibility to use all contemporary known assisted reproductive technology. No problem in hiring surrogate mothers.
Limits issued by local ethic... |
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Here are some lists of [North American](https://en.wikipedia.org/wiki/List_of_North_American_animals_extinct_in_the_Holocene) and [South American](https://en.wikipedia.org/wiki/List_of_South_American_animals_extinct_in_the_Holocene) megafauna that [went extinct](https://en.wikipedia.org/wiki/Quaternary_e... |
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In my latest draft, a worm-like species buries itself deep below the crust of their world and consumes/gathers tiny amounts of heavy metals.
Can you think of any plausible reason why a wormlike creature would do so? Why would they spend time and energy digging deep and gathering small pieces of metal?
So... |
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The concept of "age" on Earth is based on the number of revolutions the planet has completed since one's birth. In a setting where interstellar colonies exists, of even in a setting where multiple colonies are established on planets which all have different revolution times around their sun, how would on... |
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Imagine a world as we know it. People go about their daily business, working to earn money to spend to be happier. Politicians lying about the same things to get votes to get more power. Wars happening for the same reasons and un-reasons. Only with a slight difference:
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> Each and every man-made mirror... |
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A super-natural vampire plague has ravaged the world. Millions have been turned in the USA alone, everyone lives in fear of a vampire attack.
In this world vampires can be killed by a stake to the heart or decapitation (sometimes). The most effective way to hurt and even kill a vampire is through using h... |
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Assumptions:
Dragons are strict carnivores.
Dragons are capable of flying, breathing fire, and otherwise sustaining life off some diet *without* the assistance of magic (however impossible that situation is).
Since they can breathe fire, would cooking their food be more efficient? Or would the cooking pr... |
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In a story I am working on the entire earth has fallen into winter that; exists in the same level and temperature all over earth and never ends. The top scientists around the world have been trying to find out why it is happening and how to stop it. Here are the rules of the great winter;
* The temperatu... |
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The hypothetical creature has evolved on a planet with an atmosphere that's much more pressurised than that of Earth. It's humanoid in appearance, in that it has two arms and two legs as well as a head bearing a mouth and eyes. Its native planet has an atm pressure of, say, approximately three times that... |
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I want to know the how many people can live on Earth's oxygen. Is there a point when humans would use up all the oxygen? What would be the limiting factors? Given we have charts to show the rate of growth, can we predict the date Earth will reach maximum capacity? Has anyone put a hard number on this wit... |
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Just an interesting idea for a government, not really sure if it's a good idea, but still interested in the results of one existing.
The idea is for your traditional representative democracy, or perhaps a [delegative democracy](https://worldbuilding.stackexchange.com/questions/23522/what-would-be-the-mos... |
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**Closed.** This question is [off-topic](/help/closed-questions). It is not currently accepting answers.
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Questions about Idea Generation are off-topic because they tend to result in list answers with no objective means to compare the quality of one answer with the others. For more information, s... |
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We have been stimulating our brains either for research or to treat illness in people: using a minute electrical current a computer can target a specific region of the brain or a specific neuron to control our emotion, memory, muscles you name it. [Read this interesting article!](http://www.extremetech.c... |
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I am super-rich person with a net worth of 32 billion US dollars. Part of my business is being contractor for NASA and SpaceX (so I have knowledge about space technology).
I already own my island and have people working for me, willing to fulfill any of my wishes. After I realized that [killing everyone ... |
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