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[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. The ...
[Question] [ There is a veil which separates our reality from a parallel dimension that contains Eldritch abominations. An predatory empire has discovered that they can harness the power of this realm by summoning demons across the barrier. This is done through the use of human sacrifices. The more powerful the demo...
[Question] [ One of my characters (who comes from Earth) wants to open a restaurant in a fantasy world. This world is currently in its medieval era. The restaurant would serve all sorts of modern food; deep fried, baked, you name it and they have it. The restaurant is equipped with modern kitchen appliances and facil...
[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/110982/edit). Closed 5 years ago. [Improve this question](/po...
[Question] [ When a person dies, their soul doesn't ascend to the afterlife automatically. The soul build's a connection with its body while alive, and remains attached to that body in death. Through natural decomposition, the soul gradually loses its connection to the mortal realm. At some point, when the body decay...
[Question] [ Suppose on Earth there was a hidden army in Antarctica. This army is highly technologically advanced and equipped with highly advanced technology. One day, on routine patrol of the United States, one of their planes has an accident and crashes. The US government comes in and steals their technology and s...
[Question] [ Thinking about the question about [Arcologies](https://worldbuilding.stackexchange.com/questions/19113/the-anatomy-of-arcologies/19188#19188) I was wondering using known science and even a little speculated science would it be possible to safely land a large space ship on a planet similar in size to Eart...
[Question] [ **Closed**. This question is [opinion-based](/help/closed-questions). It is not currently accepting answers. --- **Want to improve this question?** Update the question so it can be answered with facts and citations by [editing this post](/posts/223344/edit). Closed 1 year ago. The community reviewed ...
[Question] [ Okay, I know I'm posting a really implausible question, please be understanding.... Many years ago, a powerful mage went mad (occupational hazard; one *does* encounter eldritch horrors and reality-altering magic when one is a powerful mage responsible for keeping the world safe), harnessed the powers of ...
[Question] [ In my world, a species of vertically challenged humanoids spreads out from their island homelands to the wider world, entering the interspecies race for global dominance. Now, this species of humanoids are quite disadvantaged in a straight fight against any other, being the smallest at but 1.1 meters tal...
[Question] [ In cyberpunk genre, we often see commercial companies (Big Scary Corporations) engaged in military conflict against each other. This can be seen in videogame "Syndicate" and other media, for example. But would it actually make sense in real life? What needs to happen in order for this to begin? What kind...
[Question] [ I want to have alternate history where Napoleon fights Ottomans backed by the British. I need British as enemies no alliance with them whatsoever. How to make Napoleon invade Ottoman empire instead of Russia? [Answer] Russia and Britain were at war between 1807 and 1812, but it only amounted to some ...
[Question] [ In an alternative universe I'm wanting Nazi Germany to maintain as much of its war-achieved empire as possible, via reaching a peace agreement (and *not* more successful efforts on the war front, or other explanation). Since for most of the early war Nazi Germany had the decisive advantage on the Western...
[Question] [ What would the orbit of a planet orbiting two stars look like? Would the planet orbit the stars simultaneously or one after the other? How strong might be the gravity well of such a system be? Any diagrams or pictures will be appreciated [Answer] There are three ways a planet can be positioned in a bi...
[Question] [ Is there any solid, scientific counterargument against the hypothetical explanation that attributes dark matter as matter in hidden planes of existence? I am trying to construct a world in which there are creatures and objects similar to ordinary objects (physically, if not biologically), and they are no...
[Question] [ In my world there is a neolithic civilization of people who inhabit earthen trenches. The people first soften the earth with ... fluids ... and dig out 6 - 12 foot deep trench systems that extend out for many square miles with bamboo and ceramic trowels & spades. Though digging out massive trench system...
[Question] [ If dolphins came out of the water again and evolved into something approaching human intelligence, how would that look, taking into account their physical characteristics and what happened evolutionarily when they moved into the water? They would have to be able to walk again, so how would this work? ...
[Question] [ ## Background Information As we all know, life as we know it today is caused by the process of natural selection, sometimes referred to as *survival of the fittest*, as proposed by Darwin. Essentially, the organisms better at surviving would be more likely to pass on their genes. Before Darwinism became ...
[Question] [ Following on from [my previous question](https://worldbuilding.stackexchange.com/questions/30998/what-kind-of-historic-event-would-precipitate-a-worldwide-corporate-dystopia), where we brainstormed the events that might lead up to such a hellish world, I've been thinking over what the social structures a...
[Question] [ **Closed**. This question is [opinion-based](/help/closed-questions). It is not currently accepting answers. --- **Want to improve this question?** Update the question so it can be answered with facts and citations by [editing this post](/posts/30533/edit). Closed 3 years ago. [Improve this question]...
[Question] [ It's a staple in tabletop RPGs: "Long ago, the guilds ran everything, but then [insert event] made the people form a more centralized government". I want to make a medieval fantasy city-state civilization that is a satire of corporations, in that there is no central government only guilds, but I always g...
[Question] [ Would a centaur eat meat? Humans do (usually) eat meat, but horses are vegetarians. Would they be omnivores, carnivores, or herbivores? [Answer] **Omnivores.** But of course, they could be either three. I asked a horse-owning friend, who looked at me oddly (as usual), but told me about a book she read...
[Question] [ Assumptions: * We have materials that can withstand the temperatures/pressures/acidity of Venus. * We can get to Venus and back reasonably easily (NASA does shuttles every 3 months). Here is Venus: ![enter image description here](https://i.stack.imgur.com/CF4gVm.png) From what I know, [water boils at 100...
[Question] [ This world has an incredibly high humidity rate all year round and I'm curious as to what - if any - evolutional changes might occur in human skin. Would it just be less porous or would there be a more drastic effect? edit: humidity might not have been the right way to describe this. I really mean a plan...
[Question] [ **Closed.** This question is [off-topic](/help/closed-questions). It is not currently accepting answers. --- This question does not appear to be about worldbuilding, within the scope defined in the [help center](https://worldbuilding.stackexchange.com/help). Closed 1 year ago. [Improve this question...
[Question] [ I'm writing fiction in a shared world that I have some control over, and for my own benefit I'm trying to figure out a reason why the Dwarves in this world wouldn't be 'mature' until they'd reached 50. In this world, the absolute maximum age of a dwarf is ~350. I'm going to say they mature at the same ra...
[Question] [ My story has a country/society made up of mostly shapeshifters. How shapeshifting works is that once someone turns 21 they are allowed the gift of shapeshifting through an advance technology. They can't choose what they get, it could be anywhere from a blue whale all the way to at least something with a ...
[Question] [ For years, I've been building and rebuilding an alternate Earth. The point of departure is 56 million years ago, when the hottest episode in the last 100 million years, the Paleocene-Eocene Thermal Maximum, lasted four to five times longer than it did in our timeline. Here is some of the backstory that i...
[Question] [ [This logbook entry from Destiny 2](https://www.destinypedia.com/Mysterious_Logbook#-046-) states that > > WARNING. Novel prion detected in body collagen. Hypothesis: Jovian > magnetosphere promotes highly abnormal protein folding. Prognosis: > massive sloughing/fraying of basement membranes, Loss of ti...
[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. This...
[Question] [ **Frozen/Solid light Shields** I can't find much online; but after listening to an Isaac Arthur episode where he briefly mentions frozen light, I immediately thought about the Hardlight items from the Halo series. My basic idea: being able to control the light and the distance it can travel so that it b...
[Question] [ In a battle, a mage uses a spell that summons a bolt of lightning from the heavens to strike whatever the mage desires. The lightning lands smack dab in the middle of a tightly packed formation of men, similar to a phalanx. What happens? -How many people would die of this? -How many would be injured? In...
[Question] [ In many fantasy worlds, dragons are depicted with six limbs: four "legs" (two front limbs and two hind limbs) and two wings. In the real world, we don't really see vertebrates with more than four limbs, but would it be feasible for six to develop? If so, how would this happen? [Answer] ### A parallel ...
[Question] [ This would be something mass produced by a secret organization that has learned how to mass produce antimatter. Since antimatter particles colliding with the particles of its corresponding regular matter form results in them both annihilating, is it possible that shooting antimatter at someone would just...
[Question] [ I'm about to flood the planet with magic, which doesn't play nice with tech, especially power. The only places tech will still work are Null Zones which cancel magic due to deposits of minerals (the specific minerals are still undecided). When this flood of magic hits, power fails instantly, with no chan...
[Question] [ I'm wondering what kind of conditions (planetary mostly, but cultural or other such fields could work as well) would promote the development and distribution of air or pneumatic weapons over regular combustion types that we have today. Not necessarily into the modern era, but around when firearms were be...
[Question] [ I'm wondering whether it's possible to create a gun that shoots some kind of shock wave to permanently damage nerve cells and instantly immobilize a hostile target but leave them alive. Would such a weapon be feasible? [Answer] There isn't such a (known) effect in the real world -- lots of ways to *t...
[Question] [ **This question already has answers here**: [Perpetual fog issues](/questions/29067/perpetual-fog-issues) (3 answers) Closed 4 years ago. How could a region have a (semi-) permanent mist/fog? As close to natural as possible but possible enhancements are an option like: * Technological : can both ...
[Question] [ The mad scientist community is...mad, to put it kiddie-appropriately. Their logic has the tendency to make 0% sense 100% of the time (provided, of course, that they ever bring it up.) So you can imagine a field scientist's confusion when the community tasked him to imagine a hybrid between a wild bison (...
[Question] [ [This is not my question.](https://worldbuilding.stackexchange.com/questions/15516/computer-resources-needed-to-simulate-our-universe) In my story, I have a machine that you can connect to using electrodes. It allows one to enter a small virtual reality room where everything from gravity and electromagne...
[Question] [ In my novel, an experimental airship needs to land in a field but it's in a foreign country where there was no coordination ahead of time to have people on the ground help tether it. Is is still possible for the crew to land it, and how would they go about doing so? For clarification, this would be a fai...
[Question] [ The setting is a classic layered mega city type deal, lotsa concrete and steel and oily dirty pollution. I've got some non-fantastical options to work with. Steel frameworks, sheetrock, fiberglass insulation, rapid printed concrete exteriors, and steel meshed double pane glass. Really nothing that might ...
[Question] [ This is a small civilization (more than just a town or two) almost under the shadow of the regional hegemon. The dominant civilization knows they are there, but don't go too deep into that swamp because they are so outflanked every time. How could I have a set of normal humans be adept at getting around...
[Question] [ Inspired by [Personal Teleportation as a Weapon](https://worldbuilding.stackexchange.com/questions/142436/personal-teleportation-as-a-weapon) Using the teleportation rules from that question: > > 1. The Teleporter can teleport themselves and/or any object (including people) they are touching, with a tot...
[Question] [ On a habitable world completely covered in water, with no land above sea-level, there would presumably be storms of biblical proportions. Suppose this world has oceans so deep that the deeper layers just have too much pressure for life of any kind to survive - from the planet's organisms' point of view, ...
[Question] [ Technological level - similar to contemporary. Yes, I mean a watercraft, mostly big cargo carrying ships. I mean only calling for help while being in middle of ocean and not being within line of sight distance of shore transmitters. Seemingly straightforward question, except: * flare stars and telecommun...
[Question] [ Setup: A planet generally with an earthlike climate, although slightly wetter and warmer as a general rule, with a little more oxygen in the atmosphere, but habitable by unmodified humans. Still has equatorial and polar variation. Planet has constant winds. Stable enough long enough to have evolved a sap...
[Question] [ My world has a semi-nomadic people that inhabit a vast sandy desert. Underneath this desert lie the ruins of an enormous metropolis -- a city that was abandoned tens of thousands of years ago. In the past fifteen to twenty centuries something has changed in the region which has resulted in the slow uncov...
[Question] [ Supposing a world like the Underdark, full of civilizations that developed and live their lives completely away from the light of the sun. In the typical D&D type setting, these creatures have dark-vision or infra-vision, which I recall is typically explained by sight that works in the infrared band. Upo...
[Question] [ In the setting I'm building now, then there's supposed to be a location where the natives had found three food staple crops within close proximity with one another, near a handful of rivers. Naturally, these natives would found one of the biggest economies in the world, and their lands would be *very* ta...
[Question] [ The selected answer on [this question](https://worldbuilding.stackexchange.com/questions/96984/whats-the-biggest-reasonable-natural-planet-or-moon-with-earth-like-surface-gra) provides an extremely good, and detailed, description of what is generally accepted to be the main (only?) way a terrestrial plan...
[Question] [ I am Kaine!! God king of the Wraith-men exiles. I am busy defending against the Sun Empire's holy war, led by the usurpers own son Leon the Holy Fury. The last battle was... a bit sporting, Leon charged through my ranks in hopes of cutting me down. We exchange blows, he made me lightly bleed I took his e...
[Question] [ This is in regards to the Tyranny of Rocket Fuel. Summed up: Heavier ships need more fuel which makes them heavier, etc. You end up with diminishing returns. This is compounded by higher gravity - Everything is heavier in the first place. There's an article that claims that, beyond 1.5g, conventional roc...
[Question] [ Humans with a level of technology roughly equal to the present day, not more than a decade or two more advanced (e.g. they might have slightly more efficient rockets, or a more miniaturized comm system, but no stargates, warp drive, or lightsabers), found a colony on the surface of Mars. Assume a somewha...
[Question] [ The Leech Dragon, so named for its round, leech-like mouth, is by far one of the creepiest and most vicious dragons. Part of the reason for its infamy is its ability to exhale toxic and very flammable clouds of methane gas. These relatively small dragons, (about 5-6 feet long and very thin), congregate t...
[Question] [ There is a planet (let's call it Bob) where an ancient and powerful race once lived. They built giant gravity lifts to help move massive amounts of water high up into the atmosphere for who knows what (maybe they liked heavy rain? sadly they didn't leave any notes). They are long gone now, but their grav...
[Question] [ I'm working on creating a species that favours small families for a number of reasons, and have no interest in 'breeding as much as possible'. As a consequence, their population size is small. But how small can a population be, without running (ever) into problems with genetic diversity? I'm interested i...
[Question] [ In my story, I plan on having one of my main characters lifted off the ground by a dragon-like creature and carried a couple miles away. Of course the plan involves them surviving the encounter whether or not they leave with a few wounds as well, however there is no modern medicine for them to heal anyth...
[Question] [ Similar question to [this one](https://worldbuilding.stackexchange.com/questions/57691/how-to-calculate-your-kingdom-s-population-size) except I want to calculate the urban and rural population needed to support an army. I want to create a world for a fantasy wargame campaign using some of the elements f...
[Question] [ Most communications systems are intensely dependent upon the order in which you transmit information. For example, a binary code, like Morse Code, cannot convey information unless the order of the dots and dashes is strictly controlled and can be reliably transmitted. But, what about the opposite situati...
[Question] [ Ever since reading through the creative answers in this question ([How can I explain alien skin being different colors?](https://worldbuilding.stackexchange.com/questions/52595/how-can-i-explain-alien-skin-being-different-colors)) I've been thinking about the logistics behind fantastical skin colors. How...
[Question] [ This is one of a series of questions dealing with the magic explained below: > > In my fantasy world, magic is an energy similar to radiation. It alters the DNA of living cells, causing them to mutate or die. There are people in this world capable of controlling the magic. They can control the change, ...
[Question] [ Long story short, this civilization found very little oil and natural gas in their world (or maybe they ran out of both), but there are huge deposits of amber and special pine trees which produce rather energetic resin (source of that amber). Let's assume that both amber and resin are not unlike the ones...
[Question] [ Imagine that you want to colonize Venus. But a day on Venus lasts 4 months, and that's terrible. The big brains at the Science Palace have decided to make Venus spin faster, so that the length of day would be correct (one of the big brains suggested putting opaque shields into orbit that would artificial...
[Question] [ **If animals were scaled up to be about the same size** in anthro form (human-size) regardless of species (i.e. wolf-people and hare-people both become man-sized as well as man-shaped), **would the ones that are more deadly in our world still be more deadly?** In most fiction with anthropomorphized anima...
[Question] [ Under the [Bretton Woods system](https://en.wikipedia.org/wiki/Bretton_Woods_system) the US Dollar was fixed to gold. ($35 would get you an ounce of gold if you were there.). This obviously created problems when gold became rarer and rarer; the American dollar slowly lost its value (this is what my books...
[Question] [ Age varies vastly even in just the vertebrate world, from the 2 years a rabbit has to the over 170 year old Seychelles giant tortoise, who is still going. Obviously, Lifespan will determine population, cultural views on age and most importantly, the amount of knowledge a person can learn and teach. Is th...
[Question] [ In the book The Host by Stephenie Meyer, a parasitic species (Souls) attach to the back of the spinal cord of alien creatures to control their brains, but I find this a wee bit unbelievable. As it is unlikely that a wide range of aliens would have a spinal cord, what feature of the nervous system is like...
[Question] [ **What would, roughly, a scientific research station look like on a gas giant?** Use Saturn as a baseline. The station would float because of a "balloon" carrying nothing. Vacuum is the lifting "gas", as the atmosphere of most gas giants is already hydrogen/helium. The pressure at the average elevation o...
[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/29455/edit). Closed 8 years ago. [Improve this question](/pos...
[Question] [ Basically I want to create a world in which some of the humans have developed a higher body temperature in order to survive cold, harsh climates, such as the poles or even tall mountains. The reason behind it is rather selfish: I just want them to be a sort of barbarian like nation wearing skimpy outfits...
[Question] [ There is a planet that is full of underground caves. Some are narrow and long, others, go on for miles and are wide enough to contain entire cities. However, all of these caves, are completely dark. One organism, commonly grows to cover just about every surface. It nourishes itself off the heat of the pl...
[Question] [ In some science fiction and fantasy settings (mostly fantasy) there are sometimes things like rock giants or rock golems. Basically, what I'm getting at is rocks forms with, sentience in some cases. So I was wondering if it is at all feasible for beings like this to evolve into human like creatures. They...
[Question] [ I just asked myself what is the role of the mountains on Earth? Well there's a well known role for the climate and weather. But is there a kind of physical or geological role? What would happen if our Earth had no mountains on it? Would we have more earthquakes? I suppose erosion will be much heavier th...
[Question] [ In my world I have a couple species of sentient animals, mainly cats, who among other things are capable of communication with human beings. While I am perfectly happy to resort to explanations involving magic to justify their increased intelligence, and them using it an a human-like way - these species...
[Question] [ I am devising a magic system that requires the user to output their energy (say, metabolismic calories) as a trigger, thus letting the sea of mana do the rest. Still, the sea of mana would multiply the energy input (user's output) to a usable level. Regarding the scale, how would I measure the ratio of a...
[Question] [ I just watched Rango, and I got curious of the realistic implications. Let's set the stage. * Desert environment. * Realistic 21st century American tech, unlike the movie. * Some foreign country based on a trade economy. * They're starting to accept foreign trade, but considering that they lack a currenc...
[Question] [ A ship is sent through a wormhole to an unknown planet to create a sustainable colony. The colonists know that they won't have further contact with their home planet - this is a last ditch effort to save the species. An earlier question gave the number of colonists required as being anywhere from 80 to ...
[Question] [ Is there a way to make a planet invisible naturaly? I dont want the entire thing to be clear, but have a natural "field" or something that prevents the planet from being seen (or makes it much harder) from the outside. It should still allow someone to get to the planet. It only needs to be invisible to t...
[Question] [ I have been reading about [mutual assured destruction](http://en.wikipedia.org/wiki/Mutual_assured_destruction) and [deterrence theory](http://en.wikipedia.org/wiki/Deterrence_theory) on Wikipedia, and it got me thinking. What would it take for some of the countries in the world to actually destroy one a...
[Question] [ In relation to [this](https://worldbuilding.stackexchange.com/questions/1042/how-would-a-force-field-dome-over-a-city-effect-the-weather) question, how could I create a force field dome over that city? Specifications of the city: * 10 x 40 km on the surface * 1 km in height * has a city wall of 100 m al...
[Question] [ Something I've pondered in a work of mine, in which a corrupt authority figure threatens the protagonists with being sentenced to forced labour "chiseling ice off of (insert name here) comet." Assuming they really are masses of ice as scientists now believe, could a comet be large and stable enough to ho...
[Question] [ I have a species of sapient humanoids in my world capable of flight using 24 foot wide wings. The world's being used for a science-fantasy world, so I'd like some realism, but some can be handwaved. Not all of it, though. However, I don't know if it'd be necessary/enough for my world. Here's my world's p...
[Question] [ Earth is our only example of a habitable planet. The surface of Earth is 29% land and 71% ocean. I am wondering what other land ratios can create a habitable planet. Half a billion years ago, Earth had little land and was covered in ocean. Yet, even back then Earth had life. So it is definitely possible ...
[Question] [ I want to do something interesting with Caleb Scharf’s speculation that hyper-advanced aliens could make themselves immortal by uploading themselves into the cosmic background radiation. These light creatures also quantum entangle their component photons to help with error control. One problem is to fi...
[Question] [ Since our ears have small hair inside which (at least partially) make it possible to hear, is it possible for an animal to have hearing based on hair on its whole body? Like highly specialized small hair used to hear, but rather than localized, spread out on the body? [Answer] Flies and other inverteb...
[Question] [ I'm writing a SF military novel and at some point lieutenant takes command of forces because his own captain went crazy. The captain still gives lawful orders but he's only taking things from his own imagination into an account despite the situation in real world indicates none of that is going to happen...
[Question] [ I am envisioning an Earth that has been stripped of natural resources. Clean water, food, and wood/trees are rare and costly enough to be used as units of exchange. Whole swaths of land once fertile are desert or perpetual dust bowls (i.e. the great plains,etc.) Wind power is very common and coal is stil...
[Question] [ While trying to figure out how a civilization with 16-17th century technology could make airships I started to wonder how the wide availability of aluminum would affect a civilization. In our timeline aluminum started to become economically viable in large quantities in the late 19th century, one thing t...
[Question] [ You see, I have this world that has the same planetary characteristics as Earth, and the people of the Snoopish Empire are building an [optical telegraph](https://en.wikipedia.org/wiki/Optical_telegraph#Iberia) net. The only problem they have is that their Empire is made of tens of islands separated by d...
[Question] [ Space is mostly empty. There are few planets which could be life sustaining and even on those we are unlikely to find anything living (unless we contaminate). This means that on planets beyond our solar system, stranded colonists would have very different conditions to work with. No matter how "earth-lik...
[Question] [ Scratchera are a Revelian race, a race of rather small and agile anthropomorphic lizards. On Reaville, archosaurs and other saurians have grown to take the place of most modern-day mammals, which is relevant because Scratchera were more-or-less analogous to squirrels or monkeys. However, soon after they ...
[Question] [ I have a large insectoid creature with compound eyes in my story. The creature’s habitat is prone to sudden dust storms; as a result, I was planning to have it evolve a set of eyelids so it could protect its delicate eyes from particles. Is it feasible for a creature with an exoskeleton and compound eyes...
[Question] [ Could muscle-powered weapons be made to take advantage of superhuman strength, or Would material limitations get in the way? Assuming: * a Viking Age (say 800-1000AD) level of technology * materials available in RL medieval Europe * strength about 6x the upper end of the practical human range. This is ma...
[Question] [ What would be the repercussions of all non-human animals larger than a mouse dying around 16/17th century in a certain region or across the globe? Would it mean eventual extinction of humans, as they would not be able to get some necessary nutrients? Or just a regular apocalypse, where few would survive ...
[Question] [ How small can a planet with rings be? It doesn't have to be inhabitable, but it must be a planet (not a dwarf planet). [Answer] I agree with the answers posted so far (the gist being that any object which is a planet can have rings), but I also wanted to talk about real-life examples of low-mass bodie...
[Question] [ So, I was looking at what defines the most interesting type of forcefields, and there came an interesting kind of forcefields that, rather than deflecting or dispersing energy, seems to absorb energy. Niven calls it the **Langston Field**, while Traveller calls it the **White Globe**. Now, a forcefield t...
[Question] [ I have a character (humanoid) that has the ability to breathe underwater; either through gills or through augmented lungs but I'm not sure what starting list I should be aware of in concerning their water they'd breathe. I know fresh and salt water is one issue but I'm sure each has their own set of pro...
[Question] [ Say I have a race of obligate carnivores (for simplicity, we'll say they're felinoid). They have carnivore dentition, and *must* eat meat as a major component of their diet, but they can also eat fruit and derive nutrition from it. They *enjoy* fruit (and vegetables), but for the complex flavor and tartn...
[Question] [ I have recently learnt about the [flooding of the Nile](https://en.wikipedia.org/wiki/Flooding_of_the_Nile#Basin_irrigation) and the irrigation around it, enabling plentiful crops by depositing nutrient rich silt during bronze age Egypt. I have also learnt about [volcanic ash improving soil fertility](ht...