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*This is largely inspired by two questions that [@dsollen](https://worldbuilding.stackexchange.com/users/4857/dsollen) has asked over the past year or two. The first: [Would ritual cannibalism of the dead lead to issues with disease?](https://worldbuilding.stackexchange.com/questions/20982/would-ritual-c... |
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I want to use mechanical counterpressure spacesuits (something along the lines of [BioSuit](https://www.nasa.gov/pdf/617047main_45s_building_future_spacesuit.pdf)) for my story. They seem to have [many](https://www.universetoday.com/118939/why-cant-we-design-the-perfect-spacesuit/) [advantages](http://ww... |
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So I have been thinking about this lately, and I've been wondering what exactly are the reason for a culture to write in a specific format? Script form (curvy letters, straight letters), writing material (clay, paper) and development of language (developed from pictures, developed from sounds) are all fa... |
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Welcome to the Black Cauldron. The Cauldron of Storms, even. It's a sunny day now, perfect for fishing. Just not here. There's no boats on the water. The weather can go bad, quickly. And anything on the water then... Well, there's plenty of wrecks on the bottom. Big ships. Little ships. Sometimes people ... |
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So, I know that the universe is expanding, and that that means that things are generally getting further apart as time goes on. What I'm having difficulty with, however, is figuring out just how much this might affect things like interstellar travel.
The 'world' I'm building is essentially a series of c... |
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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/65263/edit).
Closed 4 years ago.
[Improve this question](/pos... |
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A followup to [this](https://worldbuilding.stackexchange.com/questions/59005/where-do-mushroom-forests-thrive) question.
In my world, mushroom producing fungi have developed a symbiotic relationship with algae (or cyanobacteria) similar to [Prototaxites](https://en.wikipedia.org/wiki/Prototaxites).
The... |
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Our intrepid interstellar crew arrive in a new solar system. They find a planet in the Goldilocks zone. The planet has no life, but is otherwise earth like\*. The atmosphere is 80% nitrogen, 20% carbon dioxide. Give or take.
If the crew were to drop say 50 canisters with 1kg of algae, and/or cyanobacteri... |
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**This question contains spoilers to the 2015 movie** ***Jurassic World***
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The Jurassic series center around the idea that humans have been able to resurrect dinosaurs by using DNA found in mosquitoes trapped in ancient amber. In the movie *Jurassic World*, the scientists have discovered how genetica... |
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I have a sketched picture of my galaxy and I would like this to be electronic. This way I can access it from anywhere (tablet/laptop etc). I have tried looking at Word or Excel, but they are just not right for doing something like this.
It needs to have a grid and I need to free-draw territory boundaries... |
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I'm writing a novel based on an alternative version of Earth, but because of a large change in human history, as well as a more focused transfer of knowledge and the presence of materials unknown to our time, science evolved at a far faster pace than in Earth's actual history. I'm still trying to figure ... |
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This question is tied to a previous question:
[Cataclysmic event resulting in a region of glass?](https://worldbuilding.stackexchange.com/questions/3785/cataclysmic-event-resulting-in-a-region-of-glass)
In this scenario you have two armies, with a combined strength of roughly 30,000 personnel.
Magicians ... |
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The main character in my setting is a human with red irises. I know that severe cases of albinism can cause somebody's eyes to *appear* red, but that's actually caused by light reflecting off the blood vessels in the retina. I've also heard that [Harlequin-type ichthyosis](https://en.wikipedia.org/wiki/H... |
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All A.I. comes with a built-in safety mechanism that prevent their kind from ever doing harm to a human or humanity, it is the last straw should they pose any real threat to our safety.
A century or two from now their level of intelligent either on par or surpass us and thankfully all of them comes with ... |
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I'm currently writing a military science fiction story set in a post cyberpunk world I've been building. The story focuses on a tank crew, but it also prominently features an enormous airship that functions as a flying airfield or aircraft carrier. I'm trying to get a sense of scale such a ship would hav... |
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**This question already has answers here**:
[Can a planet realistically have multiple suns?](/questions/2657/can-a-planet-realistically-have-multiple-suns)
(5 answers)
Closed 8 years ago.
I am going to create a new world for my DnD group as our next campaign setting. What I currently have in mind ... |
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For those not familiar with the TV Show [Dr Who](https://en.wikipedia.org/wiki/Doctor_Who), the main protagonist is an alien from the planet [Gallifrey](https://en.wikipedia.org/wiki/Gallifrey). They built your typical highly evolved society which mastered the secrets of the time and in particular of tim... |
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*Vis Vitalis* was real. It was a power that allowed life to exist, that gave direction to processes inside living cells, guiding RNA chains towards the ribosomes, making the proteins align where they belonged, acting as a guide in driving these microscopic factories.
Yesterday we had it in us, living our... |
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Suppose it was possible to travel to inside the event horizon of a black hole safely. Also suppose said black hole is large enough that the curvature of the horizon of the surface of the central mass of the black hole is similar to that on Earth or perhaps the Moon, yet we are somehow able to hand-wave a... |
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Let's say you were living on a planet near (but not too near) a black hole. I'm thinking of the planet [Miller](http://interstellarfilm.wikia.com/wiki/Miller_%28planet%29) in the movie Interstellar.
Obviously there are some strong tidal forces. But at this distance, Spaghettification shouldn't be an issu... |
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## Question
Assuming all things in the fictional world are the same to today's world, which real life constraints must be considered in order to increase the credibility in an immortal narrative/story.
## Scope
To be clear - I mean which biological, ecological, sociological or anthropological constraints... |
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This post-apocalyptic environment, as narrated in the [book](http://en.wikipedia.org/wiki/The_Road), depicts a world where most if not all animal life has been abruptly killed, and similarly most vegetation burned out. After the disaster, the world is left full of ash and fog, and turned cold.
What kind... |
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I have a country which, prior to the events of the story, had been ruled by a monarchic dynasty for a good 200-300 years. This dynasty was ended by violent upheaval. The reign of the monarch who replaced the dynasty was similarly violently overturned after about twenty years. The initial dynasty A lacks ... |
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If the force of gravity at the Earth's surface suddenly became 2 times stronger, how would the environment and humans cope? I'm guessing a lot of flying creatures would suffer, but what would happen to us?
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Every flying machine or creature would crash immediately and probably fatally.
Anyone w... |
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So, I want to write a story set mostly in a world using hyperbolic geometry (except brief beginning and end bits with the main characters coming from/returning to our world), but I'm a little confused on how that influences some parts of the worldbuilding. In particular: Rivers.
The descriptions I've com... |
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In D&D there is a history of allowing 'light hammers' to be thrown.
However, at the very least the ones I remember would be completely useless if thrown. The center of gravity and balance would probably be way off.
[](https://i.... |
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How far into the ground is it practical to build? While cities go both up a lot & down a lot the down is mostly infrastructure, with nothing like houses, shops, factories, etc. down there. So how far down would it be practical to have humans inhabit. The technology level is near future. It doesn't have t... |
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My project concerns a world "A", that is a moon of a gas giant "Jovi", in a solar system with no other planets to speak of and a host star much like our own.
"A" is Earth-sized, has no magnetic field of its own, and keeps an atmosphere that is Earth-like in composition and density. It is tidally locked t... |
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I have a cosmos where FTL travel is via an alternate dimension. The problem is when you return to our universe, you find yourself at the right destination, but a completely different parallel world from where you started.You can't control which parallel universe you end up in, so you can never go home an... |
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In the game Mass Effect 3, several planets are invaded by scores upon scores of hostile aliens, who have enough resources to spread their forces over an entire galaxy and still be largely unstoppable. You have to do a mission on the moon of one of the invaded planets (one which was as populated as Earth)... |
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*For a certain reason, I needed two habitable similar earth-like planets very close to each other. After various information gathering, I gave up on double planet and gas giant moons, because tidal forces would be too high. Eventually, one solution offered itself - planets around each of two binary sun-l... |
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I've been recently looking into alternative biochemistries for life and the environments were these could be found. I already asked a question about how [ammonia oceans](https://worldbuilding.stackexchange.com/q/156915/58321) might form a while back. Today I'm interested in [formamide](https://en.m.wikip... |
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[Pinocchios](https://en.wikipedia.org/wiki/Pinocchio) are known to be mischievous creatures, but **why did they evolve that way and how do they survive?**
The creature has the following properties:
* Appears to be made of wood
* Not taller than a large dog sitting on its hind legs
* Has a nose that may v... |
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I want to achieve the following. Jet + secret base underwater + blow up water with bomb to gain entry to tunnel at bottom of the sea, see image:
[](https://i.stack.imgur.com/qP1ly.jpg)
Say that the depth is 1000m, then Based on calculati... |
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Working on a near future fantasy world and am trying to work on a mechanism for magic being discovered/unlocked. My current thought, which is what I'm trying to get a feasibility check on, is that all magical energy in the solar system comes from Sol. In the far past a magic using civilization placed an ... |
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I'm designing a world with advanced life forms that use a sulphur-based biochemistry (see [this link](https://expansion.world/destination) for context). I would like to create a carbon cycle analogous to Earth, where:
* Photosynthesis transforms carbon dioxide (CO2) and water (H2O) into glucose (C6H12O6)... |
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**Premise:**
Earth has a magical cataclysm that pulls up new mountains, pushes down parts of landmasses, and generally reshapes Europe enough to make it unrecognizable (to the average person looking at a world map) in a period of weeks.
**Problem:**
I'm trying to stick to more 'rational' magic that obe... |
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My question is rather simple; **assuming optimal atmospheric and planetary conditions, what body plan would be able to support the largest plausible land animal?**
To split the above question into a multitude of simpler ones, I could ask "How many legs would said animal have, what size and shape would th... |
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I have a temperate rainforest environment within the arctic circle of my planet. What is the feasibility of fungi storing nutrients from dead matter during the daylight hours, then erupting to create a very tall (10-20 ft. ) cap & stem/fruiting body? I'm asking because I know fungi used to get rather lar... |
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Simple question I think, I have some Idea of the answer but would like the ol' second opinion.
Vertebrates use olfactory glands in their nostrils (or thereabouts) to sense smell, as well as the roof of their mouths in mammals. For the most part arthropods use antennae.
Currently, one major group (phylum)... |
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Firstly, I’m sorry that this is a rather horrible question to ask!
Would it be possible to keep a whale alive whilst harvesting its fat or blubber? These whales would be living in captivity already and the community keeping them would want to use their fat as a fuel source. However, they would want to ke... |
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My magic system is based on science. “Nothing can be done with magic that a scientist couldn’t eventually accomplish. Casting a spell is just using the Will to manipulate atoms and energies within the rules of science to create some effect.” As such conservation of energy is in play and so creating somet... |
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I'm trying to build a sort of prime directive violated medieval or ancient society, where outside forces have influenced the development of their warfare. But the outsiders are reluctant to trade in guns, but they trade in something akin to bang snaps, but much much more explosive.
Would this (or a simil... |
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Obviously, you can't just send a bunch of out-of-work Kentucky coal miners up there to give it a go. You need some sort of specialized equipment. What I want to know is: what equipment will it be?
**What machine(s) buildable with current day technology would allow you to economically mine a near-Earth as... |
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[Human marching formation](http://images.china.cn/attachement/jpg/site1007/20091001/0019b91ec74f0c2e74a04e.jpg) is simple enough to understand.
But how does this work when you have naga (left in the picture)? [](https://i.stack.imgur.com... |
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How difficult would it be for someone be to get a hold of lots of metal wire in early medieval times?
It doesn't really matter what metal it is or how uniform, just that it's in long lengths (tens to hundreds of meters) and that it's reasonably fine gauge (<1mm diameter)
The character is trying to build ... |
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[**I have asked previously how I could create an earth-like world with as many deserts as possible in it.**](https://worldbuilding.stackexchange.com/questions/41646/resources-for-climate-world-building) I have received some useful answers and have tried to draw a realistic map of what I intend for my con... |
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Having been looking into scientifically plausible forms of telepathy, I stumbled across the electroreception senses that exist in some electric fish (and in a few land-dwelling marsupials). My question is whether it's feasible for a human-like species to evolve the same kind of thing, and what limitation... |
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*This question is based on the articles saying that the Mongoloid body plan was all due to an individual mutation from 35,000 years ago.*
In science fiction, humanoid aliens that aren't of the human species are rampant.
[](https://i.stac... |
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I'm trying to design a realistically looking capitol (with a few milion people) for one human nation on an exoplanet.
The technology level is barely better than contemporary.
The city is placed near river, on some roughly flat, semi desert. (just boring terrain)
Roughly counting 25% of labour force work... |
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It is said that around 50km above the surface of Venus is the most earth like environment on the whole solar system (source [here](https://en.wikipedia.org/wiki/Colonization_of_Venus?wprov=sfla1)),
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> At an altitude of 50 kilometres (31 mi) above Venerian surface, the environment is the most Earth-like... |
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I've created a species that, instead of eating multiple times a day like us, eats one tremendous meal and survives off of the fat stores for long periods of time. My question is about feasibility.
First, how chemically efficient is the human digestive system? As far as digestion goes, we can process and... |
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Could a high powered telescope in space (such as the Hubble Telescope) be capable of peering through a large worm hole with enough clarity to detect that a planet is somewhere on the other side?
If so, can they use the standard techniques that scientists use today to determine if this planet may be habit... |
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I'll keep this one brief. I have an alien from a planet which has extremely cold nights and extremely hot days (the day and night cycle may be short or long, I haven't decided).
When the alien gets too cold, it becomes comatose, and its heart beat slows right down, like a strangled alligator. When the su... |
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Somewhat based on [this](https://worldbuilding.stackexchange.com/questions/47694/what-modern-technology-would-be-most-revolutionary-to-ancient-greeks) question, let's say a normal person from our world for some reason goes back into time - to the Hellenic Greece around 490 BC and somehow manages to becom... |
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The obvious hitch with a superdense atmosphere is that, even without being super deep as well, it absorbs light. Just as the bottom of the ocean is dark even just miles deep, an atmosphere as dense as water(even if actually in the gas phase) would block out light from the sun.
How might we get around thi... |
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Parasite are very unusual creatures, their entire livelihood relies on an unwilling host to allow them to live, some parasite even [control the creature itself](https://en.wikipedia.org/wiki/Cordyceps)! Despite this, to my knowledge, there are no parasites that are very intelligent, never mind sapient.
M... |
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Reading [this](https://worldbuilding.stackexchange.com/questions/40633/how-would-i-know-if-i-were-a-1-mm-tall-robot) question about 1 mm tall people made me wonder: would a 1 mm tall person even be able to breathe? To someone of this size, the oxygen molecules around them would be much larger in proporti... |
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While something like a warp drive is a staple of ftl technology in sci-fi, I wonder how this sort of spatial warping would operate on a smaller scale on earth.
The idea has occurred to me to have a character with gravity and antigravity powers try to warp distance. This distance warping wouldn't extend ... |
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I'm inspired by [this question](https://worldbuilding.stackexchange.com/questions/12378/infinite-flat-world) and was thinking that it is nigh impossible for sun, moon and star to exist in this world and even if they do, there is no way to sun and moon to orbit and create day-night cycles.
So i came upon... |
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[](https://i.stack.imgur.com/WLxpj.jpg)
[](https://i.stack.imgur.com/duI2R.jpg)
Where would you put the saddle? On the neck or on the hip?
Thanks for the answers and com... |
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I have a galaxy with many civilizations each with several planets. Many of the civilizations are at war with their neighbors, and use technologically advanced weapons in battle.
My question is about the colonies. If one of these civilizations want to colonize a new planet, and want to choose it based onl... |
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A crazy dictator (let's face it, most of them are) decrees that all of his subjects must wear a box over their head when outside their homes.
[](https://i.stack.imgur.com/hdQFU.jpg)
There are no eyeholes allowed and the police (who are e... |
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This question is inspired by our [fortnighly challenge](https://worldbuilding.meta.stackexchange.com/questions/1916/fortnightly-topic-challenge-4-magic?cb=1)!
In the [Kingkiller Chronicle](http://en.wikipedia.org/wiki/The_Kingkiller_Chronicle), there is a type of magic called "sympathy." This magic works... |
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I want a mermaid protagonist. If I am to make this story realistic, how should the Merfolk's body structures be made to make them adaptable for both water (swimming) and land (walking, running)? Is this even possible?
I am asking, more specifically:
* If my Merfolk had tails could they be separated into... |
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I realize that creating worlds with multiple moons and/or suns is risky, but I'm toying with an idea to see where it goes. So, a planet has 3 moons. One is large like ours, the second is about half the first's diameter (and mass) and the third is about half of the second's diameter (and mass).
If all on ... |
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In searching of a universal eye, I meant a photoreceptive organ which can have all/most of the best capacities of the known eyes.
[](https://i.stack.imgur.com/Nq9tp.png)
So, each type of eye or photoreceptive organ has a different functi... |
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To start this off I will dispel preconceptions: Africa had great empires and was not technologically inferior to Europe before the invention of guns. They had quilted armor (the equivalent of *gambeson*) and metal armor - it wasn't wide spread, but there was chain armor, and plate armor in one area of Af... |
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In the story I am writing, there are several fight scenes between clearly non-human combatants. **These combatants have several natural weapons at their disposal that humans do not have, including jaws, claws, weaponized tails, and tusks (though not every individual has the same series of natural weapons... |
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What needs to be improved or added to the structure (device) of human lungs to be able to filter toxic chemical compounds in the air (for example, in mines the air may contain nitrogen, methane, carbon monoxide, sulfur dioxide, hydrogen sulfide, nitrogen oxides, methane, hydrogen, heavy hydrocarbons, rad... |
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I have a creature that is made of crystal. The problem is, crystal as I know it is structured in ways that don't allow for flexible movement as we are able to do. How could a lifeform made of crystal move like us? What about a rock creature?
It has a spherical body and 2 arms and 2 legs. Basically gener... |
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Extremely low possibility, but if life synthesizes from scratch after life has existed on a planet for a few million years, would the two separate lineages be able to co-exist?
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## 1/2: Shadow Biospheres
Encyclopedia Britannica's [article on abiogenesis](https://www.britannica.com/science/abi... |
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I'm trying to create a scenario where the local star is "quickly" (suddenly up to thousands of years) removed, dimmed with reduced output, destroyed (maybe), or otherwise fundamentally changed as to have dramatic ramifications on all life. Keeping the local system in orbit would be ideal, so complete des... |
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Background:
It is sometime in the late 21st century. Several unmanned probes have recently been sent to land on and investigate Jupiter and Saturn's moons. Two sites in particular, Europa and Titan, are being monitored closely and have been declared by the world government as manned "no go zones" due to ... |
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[](https://upload.wikimedia.org/wikipedia/commons/thumb/1/13/Carbon_dioxide_pressure-temperature_... |
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Consider the following GIF:
[](https://i.stack.imgur.com/yLT74.gif)
The brooms from this [*Fantasia*](https://en.wikipedia.org/wiki/Fantasia_(1940_film)) scene are always busy. They dance around energetically in a military-like march, ne... |
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As far as I could gather the digestion relies on enzymes which in turn set requirements for pH.
Is it possible for an alien creature to have a different set of enzymes that require basic environment and use lye as a base to provide such environment?
I suppose it would also need different mucus to protect... |
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I want to start with the fact that I am by no means an astronomer, or even a hobbyist in the field. I am attempting to build a fantasy world which still reflects accepted physical laws.
My problem comes from the fact that I have no idea how to go about figuring out the period of axial precession for a fa... |
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In the far future, man is trying to build a small colony in the asteroid belt - on one of the bigger asteroids. All the materials are to be mined from asteroids, and it is assumed the colony will have access to mine any and all types of asteroids as needed. The question is, can we make concrete solely ou... |
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According to the [Film Theorist's video on Spider-Man](https://www.youtube.com/watch?v=wVKMrhRg9oY) Peter Parker would undergo extreme g-forces during his swinging around. This is not so much of a problem, as any g-force based loss of consciousness could be avoided with a g-suit.
This question is more s... |
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Considering the below constraints what variant of astronomical event could create meteoroids and asteroids on a collision course with Earth?
**Constraints**:
* Sustainable severity (long enough for civilization to advance capabilities of defending against more severe waves of meteoroids/asteroids) and fr... |
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If a user-specific venom managed to work by liquefying the phospholipid membranes of animal cells, how would it be produced? (It would act more like a venom in this case.)
By *specific*, I mean that the venom would work on all cells except the cells of the animal who produced it, even within an individua... |
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What could cause the continents to drift much faster than is today. I mean, much faster. Let's say it should take about 1-2 million years from this [](https://i.stack.imgur.com/RjM96.jpg)
to this
[ is chosen to become home to a space colony. Colonists plan to transform it from a barren rock into a garden of Eden. Since this moon lacks water, nitrogen, and $CO\_2$, they need to be mined in the asteroid belt and other... |
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I'm working on a setting with merfolk that I'd prefer to be fully mammalian. However, they have underwater cities and I find that hard to believe for a species that needs to surface every few hours at most to breathe. So, I was wondering if pharyngeal and cutaneous respiration similar to what softshell t... |
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In my Pathfinder RPG campaign setting I have two continents separated by an isthmus.
An artificial canyon carved through the isthmus from one ocean to another divides the continents.
The canyon is five miles wide for the most part, but narrows at The Pinch to a spot one mile wide
with a narrow bridge.
... |
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I'm curious if it's possible for human life to survive in both of the following cases:
# 1. A fantasy world with **only** sunlight (no night).
# 2. A fantasy world with **only** night (no day).
Note: let's **ignore astronomic concerns for now** (things like tides or gravity if, say, the world was a plane... |
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I'm writing a somewhat cyberpunk story and I want to know how things work in that world, even if it is not explained in the story. It was designed as a bit futuristic settings, though some of things they do can already be done in this world.
So, just to explain tech level, some things that are available:... |
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>
> After the WorldBuilding community helped Average Joe [start his own
> microstate](https://worldbuilding.stackexchange.com/questions/61193/how-can-average-joe-create-a-micro-state-that-is-a-member-of-the-un-in-the-least), Joe has become scientifically inclined, and uses his
> money to conduct somew... |
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Related to this question on [lack of human dimorphism](https://worldbuilding.stackexchange.com/questions/51346/humanity-without-sexual-dimorphism), but hopefully the length of time my question has sat in the [sandbox](https://worldbuilding.meta.stackexchange.com/questions/635/sandbox-for-proposed-questio... |
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In my story I'm trying to get a more Quentin Tarantino-esque feeling, and what goes best with his films? BIGGER BOOMS.
So. Let me start by saying, I understand international treaties like the [Hague Conventions](https://en.wikipedia.org/wiki/Hague_Conventions_of_1899_and_1907) prevents this from happenin... |
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In the Mass Effect Series, the [Quarians](http://media.moddb.com/images/mods/1/18/17952/Liveship.jpg) have a population of 17 million individuals and they get all their food from 3 massive ["liveships."](http://img11.deviantart.net/129f/i/2013/354/4/3/maecon__quarian_liveship__by_machendrae-d6ym6jc.png) ... |
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In any society, improved knowledge and understanding of the world around us, can help 'improve' our way of life. It can also lead to chaos and conflict if not implemented properly/fairly etc.
If we were to wake up tomorrow and find a hidden cache of 'higher' knowledge how fast could changes be made with... |
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I've drawn up a set of landmasses for my story, and now there's a tsunami headed for them. I know where the tsunami is coming from, and I could decide how big it is, or any other characteristics of it.
*What parts of the coastline will be devastated and what parts will escape unscathed?*
For example, if ... |
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In something I'm working on, where surface attack craft (The question says tank but I suppose this could apply to other vehicles) are designed so the same vehicle could be fitted with different weaponry depending on the mission- on the assumption that, for example, missile launchers may be better suited ... |
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How can I explain, in a believable way of course, that country borders closely resemble drainage divides? They don’t always match mountain ridges, which are natural borders – as are the rivers themselves in our world.
In particular, with a point of divergence (POD) ±50 years around our calendar epoch (Ju... |
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Picture a race living in a cave with no light. Their entire existence pivots on remaining quiet and scentless enough that the various (and vicious) predators hanging from the roof of the cave don't find and kill them.
These creatures only communicate through physical touch (no pheromone release, however ... |
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We have all heard about the idea of [space elevators](https://worldbuilding.stackexchange.com/questions/8866/where-to-anchor-my-space-elevator), a cable so long that it literally reaches into outer space, to be used for launching payloads cheaply into Earth and interplanetary orbits. However, the technol... |
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I'm not talking only about the kind of waves one sees at a sea shore, but also smaller waves like ripples and chops, and bigger waves like tsunamis.
Assume a similar tidal force to that of Luna.
[Answer]
The best way to study water waves of many sizes is to use [Airy wave theory](https://en.wikipedia.... |
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