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I have noticed through several science fiction series that there are those who travel on spaceships with advanced technology yet their clothes are anachronistic
Example:
[](https://i.stack.imgur.com/Wv... |
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We have earth at the beginning of the 15th century, and suddenly the biggest continent disappears. There is nothing left of it, no animals, people, lands, anything.
I don't think the details of the reason to disappear is essential. I want to add that there are no noticeable catastrophes connected with th... |
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Litter size varies vastly even in just the world of mammals, from the single spawn of an elephant to the up to 30 children an opossum can have. Obvious, litter size will determine population, cultural views of children, child rearing and even the family dynamics.
Is there a good solid rule for the amount... |
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It seems to be a recurring idea in science fiction that some industrial tools, especially mining tools, are extremely sturdy and reliable to the point that in certain combat situations where durability is the top priority they outshine even military grade weapons. This trope was seen in Dead Space, and o... |
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The SCP is an organization created after World War 2 that deals with threats to our species and the entire planet: mystical or alien artifacts, world-ending events, ancient monsters or gods that predate humanity, and other things best left unsaid. They require the cooperation of world governments and oth... |
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Meet Todd the time traveler. He's a good boy and has decided to use his powers for good, more specifically he wants to stop the black plague from happening. His powers work in a similar fashion to the time travellers from the Butterfly Effect movies; the time traveler is immune to paradoxes, he remembers... |
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All of the countries having highly skewed sex ratio are skewed towards a preference for male children. Some of the worst examples are [China](http://theconversation.com/pity-chinas-bare-branches-unmarried-men-stuck-between-tradition-and-capitalism-68592), due to one child policy and expectations that son... |
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I know it's not really all that exciting, but things like eating will be very prominent in the cultures and show up a lot in my story...
In my world I want my race to have at least two different types of eating utensils, like chopsticks and the knife and fork. Other than with these, most humans will eith... |
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An un-treatable virus starts infecting and killing people. Societies are on the brink of collapse, and it is decided the best way to save the most amount of people is to move everyone who can fit into nuclear-powered aircraft carriers and then out into the pacific ocean.
The basic plan is to have all the... |
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Consider the following situation:
Over the last 2 to 3 years, all the world's birds and bats *outside of those in human captivity or domestication* have stopped getting sick; sick - even terminally sick - animals have recovered, and these animals now have lifespans extended to about double that which the... |
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Amazon has extended to Mars, and their Prime customers there need, if not 1-day shipping, at least 1-month shipping.
They have created a shipping mechanism involving some method, that allows them to ship items to Mars in 1 month. This method is fairly resource-intensive, but Amazon researchers have deter... |
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I am designing a species specifically designed to be technician on spacecrafts, where their workspaces have low-gravity. Here is how they are currently designed:
* They have two pairs of arms instead of the current human design, two arms and two legs.
* They have a prehensile tail which can wrap around t... |
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Right now, I'm facing a problem:
## Dragons are useless.
[](https://i.stack.imgur.com/UHD4Sm.jpg)
*This is dragons every time they come into contact
with any fireteam.*
Most of my characters are non-humans. Among them, dragons have... |
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So I'm the owner of a startup which is going to make our lives easier with custom-DNA creatures! Our few first products are selling very well and nothing was wrong until last week's events.
Another company has bought one of our products and just decoded the entire DNA sequence, then changed a few things ... |
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In my story, a whole scientific mission will land on a desert planet whose temperature in the day reaches sixty degrees Celsius, they will land near the North Pole, specifically next to a Great extinct volcanic mountain 15 km high with cinder cone shape.
Assuming (mostly unrealistic) that strong winds an... |
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The time period is ~medieval. Imagine two characters who are physically fit. One comes from a city, the other has lived his life in the forest. The total distance they'll cover is ~170 miles. The terrain being covered is a forest. The season is late Spring to early Summer so snow is not a factor. The onl... |
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In several fantasy works they have the iconic dragons, giant reptile creatures and that commonly breathe fire. In some works these creatures were tamed and trained to serve as military weapons in wars, making it rare or even impossible to find wild fire dragons. However, in other works the dragons are ge... |
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I've always considered teleportation to be one of the most under-rated super powers in all ways, but at the moment I'm thinking through the ramifications of personal teleportation as a superpower in fights both large and small. The "best" use I've seen for teleportation would possibly be [Nightcrawler as... |
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Religious rights are protected, and freedom to religion is secured, how can we reduce religion in a country without breaking religious rights laws.
**Here are some examples:**
* Ban religious schools (perhaps indirectly by only allowing state-schools)
* Teach atheistic/spiritual/non-religious philosophie... |
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Not an astronomer (obviously), but had a curious question. Is it possible to have a planet such that:
* Its star is right on the edge of a nebula
* The planet happen to be in the goldilocks zone and has the right atmospheric makeup to support life
* This planet's orbit takes it in an out of the nebula, c... |
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[](https://i.stack.imgur.com/xyUAg.png)
# Background
The known world consists of dozens of continents floating in an airy void. These continents range from small islands a few square kilometers in size, to great land masses up to 1,000 s... |
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It turns out that all of the deities and various demons, angels, and spirits are real. The super natural world took a hiatus since the dark ages for reasons not relevant to this question and for equally obscure reasons just all decided to come back out of the blue. So now you have divine and semi divine ... |
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**This question already has answers here**:
[For how long after an apocalypse would modern cars remain usable?](/questions/81560/for-how-long-after-an-apocalypse-would-modern-cars-remain-usable)
(11 answers)
Closed 6 years ago.
Typically, gasoline has a short shelf life (some months, maybe a year)... |
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Would it be possible to have a region on a planet that is not near its poles that has below freezing temperatures most of the year, while having more temperate regions both above and below it? If so how? Would the sun have to do a weird? Would the planet need to be an odd shape? Is it just impossible? Al... |
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**This question already has answers here**:
[I'm stranded on an alien planet. How can I tell what's good to eat?](/questions/26426/im-stranded-on-an-alien-planet-how-can-i-tell-whats-good-to-eat)
(7 answers)
[How to tell what can I use in space bistro? [duplicate]](/questions/62273/how-to-tell-wha... |
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Suppose in a very very long future, humans have become relative powerful military force in galactic politics due to a very powerful weapon: the ability of creating black holes wherever we want. Now we are safe from other aliens (except for very ancient species, which are peaceful anyway but they could le... |
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As the title says: How can a warehouse be secured to the point of highest possible security within a **16th century setting**?
The warehouse is located at a harbor and roughly 50 meters in length and 15 in width. It's owned by a really wealthy merchant and stores pretty much anything but weapons. There a... |
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In a lot of stories there are fights between man and machine; rogue AI that has decided humans are inferior in some respect and chooses to wipe them out.
What if the only chance for any remnant of our existence to survive was through AI machines? Once made energy efficient and solar powered robots would ... |
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Alfred is on trial. He stands accused of murdering Frank. He was caught red handed with a knife that tested positive for Frank's blood. He was also seen dumping Frank's body into the river by Bob, Frank's brother, and Mike, Alfred's best friend.
It seems like an open and shut case - except for one thing.... |
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[](https://i.stack.imgur.com/EsDMN.jpg)
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> **Antenna farm as seen on the USS Sulaco from *Aliens (1986)***
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We often see menacing sharp communication spikes and clusters on spacecraft in movies, shows, games, and etc. It makes t... |
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So I want my rabbits to have lightning swords. Well it's not literally a blade of plasma but just a metal sword that has a current flowing through it.
What kind of advantages would the weapon bring about in melee fights like duels and group fights?
I would imagine that it would be shocking (pun intende... |
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If you were on a raft in say, an ocean of blood, and it was very still, would you be able to see the stars of the night sky reflected in it? Would you be able to see your own reflection? How far down would you be able to see? Far enough to see things moving below the surface? Big things? Big carnivorous ... |
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TLDR: Portals to other places; wizards use them to make nukes-as-fireballs/anti-personal level attacks, how do they survive?
**In a system of magic that functions around opening portals, what considerations do these portals need in order to be “safe” when a wizard casts something like a "fireball"?**
The... |
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I am in the process of beginning to write a fictional book.
The book will be set on present day Earth however I want there to be a fictional city.
In my head, I have decided the name, that there will be a river and possibly a coast.
I just wondered what is the process of designing a map for the city?
I ... |
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In a futuristic setting, I have two characters, an electrical/electronic engineer and an anthropologist, and I would like them to meet as coworkers. In what sort of environment would those two professions be likely to work together?
My first thought goes to either exploration (à la Star Trek) or humanita... |
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Assume a standard, inexpensive modern laptop, left in a standard laptop bag for 300 years, under cover, in a dryish, but imperfect environment, such as a cupboard in a house.
How much of it would remain? Would the battery have burst, corroded or caught fire? How much damage might we expect? Might it sti... |
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**Setting:**
I'm working on a scifantasy setting that has many of the "classic" monster tropes turned on their heads a bit/adds unique biology/ that sort of thing. The metacommentary is about assimilation. The general idea is that in the past, humans were part of the general food chain, but as humans b... |
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In my world one company has had a monopoly on FTL comms, making large beacons in each inhabited system. This company has worked to prevent knowledge that smaller FTL comms were possible, in order to ensure their monopoly.
The system ansibles work by having a hard coded location and identifier for each co... |
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The classic example of a cylindrical space habitat, [Clarke's Rama](https://en.wikipedia.org/wiki/Rendezvous_with_Rama#Design_and_geography_of_Rama), has a 10 km-wide ring of water at the middle. Most depictions of this [O'Neill-style](https://en.wikipedia.org/wiki/O'Neill_cylinder) of habitat do somethi... |
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Edit: Everyone's ignoring the condition that the wizard needs to survive! This transmutation is to an object they're holding, it is not at a distance and any shielding is on the object and gets transmuted also.
This is a modern wizard who understands chemistry and atomic physics. The old idea of lead int... |
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So, in this story, my main character and his friends go to the ruins of an old city from the pre-apocalypse years. He needs to go there to retrieve a valuable artifact, but the local tribe that controls the territory won’t let it happen. They are convinced that all pre-war cities were built by gods, not ... |
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The year is 203X, and a [small-ish](https://www.wolframalpha.com/input?i=1.887%C3%9710%5E6%20cubic%20meters%20*%20density%20rock%20*%20%280.5%20*%20%2820km%2Fs%29%5E2%29) asteroid is detected just 24 hours before it hits the atmosphere above [central Florida](https://nuclearsecrecy.com/nukemap/?&kt=10000... |
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How do force field work in many sci fi fictional universes? I remembered the last time I checked the strength of the electromagnetic field a.k.a force field is proportional to the power output from the engine, so how does applying additional kinetic energy to the shield affect the power output? It is ana... |
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Currently, I'm creating an alien species with two eyes, but two pupils in each eye. Though I'm not sure how it would affect its vision, whether negatively, positively, or both, so I've been looking for an answer.
I previously asked this in the Biology community, though I was suggested to turn here inste... |
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I have a timeline when North America is devastated by a natural disaster in 1980: USA, Canada & Mexico are with only 5% of their people and even less of their infrastructure, thus barely functioning as countries.
Would the eastern bloc still collapse in 1989 in this timeline or would it linger longer?
... |
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**Closed**. This question is [opinion-based](/help/closed-questions). It is not currently accepting answers.
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**Want to improve this question?** Update the question so it can be answered with facts and citations by [editing this post](/posts/67273/edit).
Closed 6 years ago.
[Improve this question]... |
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I was wondering if planets die after a certain amount of time, perhaps because of decay?
If this is the case, how do they die and how long does it take?
Do they implode? Explode or perhaps just fall apart?
Incase of any of the causes mentioned above, would this make a sound, a sound is basically a wave t... |
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I'm trying to come up with a land animal that can drink saltwater but for some reason cannot drink freshwater. The advantage of drinking saltwater would be that they can get drinking water straight from the ocean and salty seas. The disadvantage of not drinking freshwater is that they cannot get potable ... |
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I've got a late middle-age like world, with a situation similar to Europe/America: one continent has a technological advance, and enough sailing skills to discover the other continent.
The incentive to sail however is different: Columbus discovered America while searching India. In my world, it's difere... |
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In the relatively realistic (hopefully), near future, scifi book I am writing I am at a point where I am describing the observation deck of a large ship belonging to a wealthy "business man" (see space-age mob boss). The idea is that his private yacht/destroyer is unique because the observation deck is a... |
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*Intro*: I have gone some way to make airships more preferable over land-based transport in my [beautiful conworld](https://worldbuilding.stackexchange.com/questions/19788/how-would-flora-behave-on-a-two-continent-planet). E.g. [making tunneling harder](https://worldbuilding.stackexchange.com/questions/4... |
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Imagine you have a big honking space gun mounted on your spaceship that launches slugs at a few percents of the speed of light. We'll call that fairly destructive.
However if you missed and the slug kept going, it could hit a planet directly behind, or any other object somewhere, sometime. If that doesn'... |
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A species that hasn’t developed any form of written or spoken language learns to speak English, or any modern language for that matter, and it becomes prevalent in their future society. To summarize, a species that has the ability to make vocal noises and has not formed any kind of means of language begi... |
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The Spanish [*tercio*](https://en.wikipedia.org/wiki/Tercio) was the premier infantry unit of the late 15th and 16th century, as exemplified at their one-sided demolition of the French army at [Pavia](https://en.wikipedia.org/wiki/Battle_of_Pavia) in 1525. The *tercio* was a mixed unit of pike and shot, ... |
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**How can I make it so that an otherwise colonizable planet (or moon) can (entirely naturally) seem uninhabitable from a certain point on its surface?**
**Background:** There are a series of immovable gates scattered across the galaxy by an unknown race. Each gate has access to thousands (at minimum) of ... |
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One day every human on earth capable of understanding a language gets has the same thought in their respective language repeated 3 times over the next three hours:
**"In order to reduce human impact on nature and let ecosystems recover, starting from 30 days from now (equals the first of April), all of h... |
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In fantasy fiction, we often see that disembodied minds or souls can think just as if they were alive - eg in an afterlife or as incorporeal undead.
In the real world, thinking and other mental activity depends on the brain (as well as a system of glands and hormones, I believe). It is well known that da... |
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In my world some people can control wind, including its temperature.
* Would it be possible to freeze stuff solid immediately (I’m most interested in freezing people, but animals and inanimate objects also count) or at least very quickly (few seconds)?
* If it’s possible, how cold would the air need to b... |
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What methods are there to make more powerful bows, besides simply upscaling it? Just for definition, I will take more powerful to mean that it has more draw strength and longer range. The tech level is medieval, but absolutely devoid of gunpowder.
One methods I can think of would be to use pulleys like t... |
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I had debated whether asking this but given the very good answers on [this question](https://worldbuilding.stackexchange.com/questions/193826/how-would-muslims-adapt-to-follow-their-prayer-rituals-in-the-loss-of-earth/194018#194018) I thought it would be worth a shot. I have a character in my story who i... |
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In the movie *Kingsmen*, there is a poison which behaves differently from most other poisons.
It has to be ingested in order to kill, but that is not enough. It is harmless until a radio signal is broadcast close to the victim, which causes death in a few seconds. This allows spies and assassins to do th... |
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Presume a decade of darkness, after a several months of steadily shortening daylight. Assume that the temperature and weather patterns remain (inexplicably) fairly unchanged.
Ten years later, when the sun comes back: which species of flora and fauna are most likely to be capable of recovering? I know th... |
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Basically, what would cause an army to go back to riding creatures in cavalry, as opposed to armored vehicles.
* The mounts can be armored, but they have to be what you'd normally think of as creatures; horses, turtles, etc. Said mounts do not have to be real, but they have to be within the bounds of wha... |
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In my world, a group of high-ranking politicians and military officials (along with their families and a few skilled engineers) realized that WW3 was imminent, and decided to bunker-down, big time: Using the most state-of-the-art technology, they built an impenetrable underground fortress, and remained w... |
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My question is inspired by the Tolkienesque elven cycle of rebirth, but with a twist.
Suppose "elves":
* Do not experience aging after reaching maturity and do not die of old age or diseases
* Mature about half of the pace of a human
* After death reincarnate in new body
* Have similar fertility as human... |
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In a lot of fantasy world's the instruments used are the same or very similar to our own, the real reason why is obvious: the creators would have to create a music system from the down up which is very difficult. However I would like to know if there is a good reason why they tend to be similar, and whet... |
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I can imagine our own civilisation becoming [autotrophic](https://en.wikipedia.org/wiki/Autotroph) eventually, if biological life gives way to a population of machines that need only sunlight. However, the history of that situation still involved a long period of organic life forms eating each other.
---... |
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Cities usually emerge at places where transportation is easy (on a plain, near a sea or a river, etc.) so that people can come and go (facilitating trade) and water and food can be brought to the city.
Under what conditions can a big city emerge on a mountain (for example in a valley)? How large can it b... |
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And what would be needed to expand this effect, scaling up to the size of a city, or maybe a country?
I've seen [this](https://worldbuilding.stackexchange.com/questions/11930/by-how-much-exactly-would-the-time-flow-be-slown-down-inside-a-gravity-room) question, and it seems that while one could do it wit... |
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A generation spaceship (a spaceship designed for multiple generations of humans to live in) could sail through the galaxy for hundreds of years before finding another planet, let alone a planet with water. What method would such a spaceship use to maintain a source of water fit for humans to drink (for a... |
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Setting: Generic medieval fantasy world, suited for a game
### Mainstream adventuring
In the real world, adventurers appear during times of new technology.
The most adventurous period on Earth was the New World era, where colonists traveled to distant lands and brought back ships filled with treasure. Th... |
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So in my world interdimensional travel produces UV light. However, there are obviously other things which produce UV light/reflect it and look different. **Being a non-physics person, can someone explain what looks particularly different when viewed with UV light?**
Some ideas I have are that the night s... |
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[Another question from Reddit](https://www.reddit.com/r/worldbuilding/comments/2t9ncv/would_it_be_plausible_to_ride_a_rhinoceros_into/) that may fit the format of this site.
Elephants used to be used for warfare in the past, and even those are hard to tame. Would it be possible that instead of horses, rh... |
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NOTE I have re-edited the title to make it clearer. I have also added some detail in the paragraphs below that does not invalidate any of the existing answers.
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Let us suppose that a group of humans several thousand years ago were shipwrecked on a barren volcanic island. The only living things they br... |
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At the beginning of the 1900s, the [Doble Steam Motors Company](https://en.wikipedia.org/wiki/Doble_steam_car#Doble_Steam_Motors_Company) built steam cars. Their engineers solved many of the problems steam cars had until then by using superheated steam and a condenser to recirculate the steam instead of ... |
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Would a "working deer" living in cities with hard paved or cobbled stone ground need "deershoes"? The deer are mainly used for light work: no heavy lifting or pulling.
Would unchanged deer feet and hoof anatomy allow for the same type of shoeing as horse hooves (nailing) or would they just need something... |
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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/114162/edit).
Closed 5 years ago.
[Improve this question](/po... |
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For a story, I try to create a perfect Orwellian state with the current state of technology.
The government controls every aspect of its citizens daily life via constant automated surveillance (CCTV, biometric systems and wearable electronic devices), ministerial departments pass extreme anti-individual... |
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I'm building a sci-fi world in which there are a lot of wars, fought across the galaxy. In order to make this world feel real, I want to design weapons that are well-suited for the environments they'll be used in.
In this case, I want to design a weapon that will stand up to the microscopic dust particl... |
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We live on this sphere of matter, and most people are content with that. However, it is really *inefficient*! A sphere is the shape with a minimal surface area compared to its volume, so assembling the same matter into another shape is going to give us more space.
I want a planet with:
* Close to normal ... |
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Follow-up of [Could the entire world have been destroyed by the existing nuclear arsenal in 1962?](https://worldbuilding.stackexchange.com/questions/80411/could-the-entire-world-have-been-destroyed-by-the-existing-nuclear-arsenal-in-19)
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* **Is it safe to grow food on land that was hit by nuclear bom... |
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Say that I own a business from around the 12th-15th century. My country uses a Silver (or, if you so wish, Gold) currency in the form of coins. I want to make a secure "vending machine" to give out objects in exchange for a certain number of these coins.
Here are the specifics:
* The objects can be of an... |
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*My husband, who loves to help me with my problems and doesn't at all intend to complicate them :::heavy sarcasm font::: suggests that Ardu Ghaib isn't the only likely thing the Arabs might have called my world. They might have called it 'Ardul jinn' or 'Ardu nastura' (the land behind the veil). My incli... |
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Let's make the following assumptions:
1. [Artificial Superintelligence (ASI) is inevitable](http://waitbutwhy.com/2015/01/artificial-intelligence-revolution-1.html), much like Y2K was.
2. People assumed that this ASI would have the power to prevent any other ASI from being created. They assumed that if t... |
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Given a map showing terrain and settlement locations (cities, towns, villages) I'd like to design a road network that appears natural, rather than just being the most efficient. I'm interested in two aspects:
* how can I realistically model the development of roads over time?
* will a road network natura... |
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A permanent static magnetic field appears on the surface of a planet that is sufficiently large and strong to attract non-magnetized ferromagnetic objects up to 100 miles distant from the source, with a pull force of 10N on a 1kg iron object at that distance (assume a small iron sword if the shape really... |
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A while ago I created a species of immortals that has existed since shortly (astronomically speaking) after the formation of the known universe. I've mostly ignored their society in the meantime as tangential to the primary story arcs they've appeared in, but this fortnightly challenge brought me back to... |
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On a planet without axial tilt and with a roughly circular orbit, there would be no seasons. The climate on the planet would be, as far as I can tell, exactly the same at any time of year, and the length of days (and thus the position of the sun in the sky) wouldn't change either.
In a circumstance like ... |
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How many human beings are/were there?
I'm spinning a story where a guy is chosen to represent the whole of humanity. In this story the minds of people who die are preserved in a cool sword that chooses to communicate with a single person every millennium or so. This enables the guy to glean info from any... |
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I've been hearing and reading about [that solar flare in 2012](http://science.nasa.gov/science-news/science-at-nasa/2014/23jul_superstorm/) that could have sent us back to the 18th century, by causing huge geomagnetic storms which would have prevented (every?) electricity-based devices from working corre... |
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Suppose that I have come into possession of a substance, technology, or spell that functions as a perfect insulator and reflector. No energy can pass through it, and is instead reflected back the way it came.
Now suppose that I completely encase a star in this stuff, cutting off any radiation of heat or ... |
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In movies and especially Japanese anime, you can see characters punching through walls, breaking columns by kicking etc. Similar effect is seen in computer games, which is something I'm interested in at the moment.
It seems to me that many of these destructive effects require more energy than how much en... |
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I had this idea the other day just for the heck of debating about if it would be feasible to build a bridge that crosses North Atlantic Ocean from Canada to Spain.
I mean from St-John's (Newfoundland, Canada) to Costa Da Morte (Spain). The bridge should be strong enough to survive the harsh weather condi... |
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Would it be possible for the atmosphere of a planet to reach beyond its planetary ring so that earth-like biology could develop on some of the asteroids there?
This question is mainly about whether there could be a life sustaining atmosphere there, not if developing life there would be possible (even tho... |
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**Note:** A fair bit of setting-lore is laid out in **[the more subtle magic question](https://worldbuilding.stackexchange.com/questions/12990/a-most-subtle-magic),** so it might be worth paying that a visit, if you haven't already.
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The sky is dark and gloomy in the swamplands, the trees stunted and ... |
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You see this in quite a bunch of movies / books (think avatar). What could be a reasoned physical explanation of such phenomenon? Would this explanation impact other things on a planet?
Like most things in nature, I'm assuming it could come from a combination of many factors. Magnetic repel (suggested b... |
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**The premise:**
Our protagonist was a intelligent, good natured, programmer who just tucked himself in bed at the end of celebrating his 35th birthday, only to wake up as a child on the day of his fifth birthday party, apparently 30 years in the past.
After going through the original disbelief, question... |
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A quite common idea to provide "gravitation" in space stations is to make them rotate, so the centrifugal force gives an effective gravitation. A possible design is a ring-shaped space station.
Now of course it is easy to calculate how fast a space station has to rotate, as function of the radius, in ord... |
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Let's take a world where you can be resurrected, [D&D style](http://www.dandwiki.com/wiki/SRD:Raise_Dead), but maybe a little cheaper, no constitution-based ill effects, and easier to access. Perhaps any cleric worth their salt can bring you back to life if your body isn't too decomposed, too old, or tot... |
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So the world has been destroyed. Pick your poison. We have probably 300 different scenarios lying around here somewhere.
**What's Left:**
* The world is a desolate wasteland, dry and crispy and barren
* Temperatures are significantly higher (Greenhouse gasses)
* Wildlife is all but wiped out (something a... |
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