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**Background:** The planet is very volcanic, having at least a dozen volcanoes on any landmass and even more in the oceans. I want the planet to have very few metal ores but a complete overabundance of gemstones.
* Just to clarify the planet does have all types of metals present, just in smaller amounts.... |
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Supposing there is a system of several (four to twelve) celestial bodies which are orbiting a star. In this system of bodies, each body is similar enough in size that no single body has a dominant gravitational field. These objects lie in overlapping and fairly close orbits as well. Naturally, this syste... |
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I am sure anyone had terrible nightmares, some are even that terrifying that they wake you up with a bed soaked in sweat, skyrocketing the pulse that it almost bursts your heart.
However, can a dream so horrifying that it indeed bursts your heart?
Imagine a contemporary scenario in which psychochemical a... |
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In some parts of the world, termites are consumed opportunistically by humans. I'm considering the possibility of using mound-building fungus-farming macrotermes as livestock for a culture of corvid that dwell in arid regions. I've calculated that a large corvid would need to consume around 70 kcal per d... |
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Ok, I know it sounds very far-fetched, but I'm curious. We know that Binary stars truly exist, and that binary planets are all but confirmed.
Here's my insane question: can there be a TERNARY planet orbit?
Is it even remotely possible that three sister planets can orbit each other?
This would be aweso... |
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I have an idea about a planet that is cold and dark, but very loud. Constant rolling storms, crashing glaciers and icesheets, earthquakes, volcanoes and so on.
Instead of photosynthetic plants, as on Earth, I was considering whether it would be plausible to have some sort of phoNosynthetic life, i.e. an ... |
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I have an idea for a city surrounded by a giant time dilation field which causes time to run much faster inside it (think something like the Hyperbolic Time Chamber/Room of Spirit and Time). There's a river running through this city that connects it to the ocean.
Exactly what would happen to this river ... |
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**The Question:**
So, in my fantasy world, I have a race of human-like creatures that can talk to any land animal. The basic question is what kind of and how many voice boxes would this race need to be able to communicate with almost any animal?
**Some background:**
In my fantasy world seven races were c... |
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**This question asks for hard science.** All answers to this question should be backed up by equations, empirical evidence, scientific papers, other citations, etc. Answers that do not satisfy this requirement might be removed. See [the tag description](/tags/hard-science/info) for more information.
This... |
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How big of a volcano would be needed for a large (Alaska-sized) area on an Earth-Like planet to be covered in a thick shell of igneous rock?
Would that volcano also destroy the world or make it uninhabitable?
If this portion of the world was already somewhat flattish, could the igneous crust be pretty u... |
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[This question](https://worldbuilding.stackexchange.com/questions/66468/how-long-could-an-operational-virginia-class-sub-survives-in-the-jurassic-sea) asks about how long a sub can survive, but the content is about how long the crews can survive. The answers given there suggest that the greatest problem ... |
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I have three planets. Let's call them Un, Deux and Trois.
Is it feasible for all three to be orbiting one another, close enough to be seen clearly by eye? All three are large enough to be earth equivalents.
What would the days be like? Let us say that each planet rotates once every 24 hours, performing a... |
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In various shows, movies, books, etc, thieves often intend to steal from wizards or, if they're lucky, from a treasure horde of long dead royalty or such and, almost as often, either set off magical traps or pick up some ancient artifact that has some adverse effect on them or entire lands. I would think... |
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The [idea](https://worldbuilding.stackexchange.com/questions/45037/how-smart-can-i-make-ants/45046#45046) of a collective consciousness is pretty simple: instead of cells you have small animals (such as ants or termites) that make up a larger creature. This is different from a hive in that the individual... |
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Can a creature evolve to reproduce by exchanging the genetic code of two individuals without having any biological sex?
So anything with male, female, both or a third sex is excluded.
If it is possible, how would it work and what are the pro et contra of this reproductive ability compared to other meth... |
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For the most part human against human bloodsport lived and died with the Romans, but a common sight in fantasy or science-fantasy is the existence of gladiator arenas in some form (Hunger Games to name a current popular one). Which makes me wonder, what historical events would best support (in a realisti... |
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So, I'm in the process of writing a book series having to do with prehistory and the like, and I'm trying to make everything as accurate to life as I can while still making it an entertaining story. The first book of this series has to do mainly with the roughly 110 million year old coastal floodplains a... |
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A large group of people has been banished from Earth and punished to scrape out a perilous existence on a strange planet. The planet has breathable atmosphere, and consists of an immense ocean teeming with wondrous marine species (some of which are catchable and edible), and small islands far apart from ... |
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Inspired by [this article about the Kepler-enabled search for life-supporting moons](http://www.npr.org/sections/thetwo-way/2016/04/13/473380087/hot-on-the-trail-of-alien-moons?utm_source=facebook.com&utm_medium=social&utm_campaign=npr&utm_term=nprnews&utm_content=20160413), I came over here to learn mor... |
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The setting: a retelling of the Book of Enoch with a distinctive sci-fi theme. The assumption is that recordings of antediluvian times were not strictly speaking inaccurate, but were written in a way that humans of the time could understand and therefore omitted a lot of details.
Angels are an extradimen... |
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In a certain project of mine, people encounter humans (cyborgs, really) from an parallel Earth in which the slave rebellion led by Spartacus successfully invaded Rome, overthrowing the Romans and making them their slaves (this assumes Spartacus was *not* the ahead-of-his-times-abolitionist Hollywood like... |
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Immediately upon reading the [Twiweekly challenge](https://worldbuilding.meta.stackexchange.com/questions/3401/triweekly-topic-challenge-29-government?cb=1) for government I saw the prompt; Any significantly advanced society will probably have government in one form or another. This made me ask, could an... |
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Let's say we have a society that for some reason (a MacGuffin, Unobtanium, Handwavium, whatever) have found a way to travel off the earth without having to fight gravity along the way. They can travel into orbit as easily as they can sail the seas or travel along a road.
What kind of technologies would t... |
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So, a visitor (whether they be from another planet or another reality) gets deposited on the face of the Earth. They find that the air's breathable, that water and suitable macronutrients are available, and that there are signs of sentient presence (us!) on this planet.
However, between:
* Their inabilit... |
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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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What conditions (physical or cultural) would make the following world plausible?
A species is advanced in the life sciences, especially when it comes to freezing embryos and *in vitro* fertilization. However, they have no gunpowder or means of travel besides medieval ships and horseback.
This doesn't nec... |
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The idea is that at some point in the future people abandoned 'cryptographical' (to use a term someone else stated in a similar question) currency in favor of something tangible (def- something one can see and/or hold) rather than blips in a data file (perhaps because of an incident where peoples' saving... |
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Under currently known science, is it possible to make a robot of which every part was either made of a clear, non-reflective material (such as bulletproof glass, or plastic), or too small or thin to be seen with the naked eye?
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It is, even if they are not too small for human eyes. Here are two... |
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Language and communication is an evolving and ever-changing beast. However, it recently occurred to me that the evolution of *many* words seem to occur because of a mistake on the part of the speaker, which the listeners spread, and a natural simplification occurs. Words combine, are shortened or misspel... |
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We see from [The Zande People](https://en.wikipedia.org/wiki/Zande_people) that a culture can remain in a tribal mentality yet have steel weaponry. We also see that their weaponry evolved after having access to metals.
I am wondering how effective Aztecs could have been against the Europeans if they dis... |
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In a parallel universe much of the physics equation have [tetration](https://en.wikipedia.org/wiki/Tetration) in them. There are things such as tetrational growth as well as tetrational decay. $x^x$ and $x^{x^x}$ are also found in some physics equations. Super logs and super roots are also necessary for ... |
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Okay, so we are figuring out, that at least for how we are running things now, our Earth can fit about 10 billion people. We can probably raise if your economy distributed resources more efficiently, but their is another route, SPACE!
[ for more information.
In t... |
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The emperor needs a way to quickly and decisively kill his enemies (Romans and non-Romans). So he devised an assassin squad to carry on his devious intentions.
* Kill or hijack enemy VIP personnel and leadership.
* Destroy important buildings.
* Sabotage enemy infrastructure.
* Spread false information.
... |
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I have a space station (sadly, only in my story) situated out in the asteroid belt that was initially built in order to mine the Asteroids. Due to the long haul nature of the job, crew would be on the station for several years at a time, often bringing their families as well.
My question is, could the st... |
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It seems fairly common in fiction for a single city to be known for a single trade good (resource or manufactured item). It then follows that any discussion of economy, which is rare enough in fiction, includes only that main trade good.
Can a system function 'well enough' to be plausible if each city i... |
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I was considering the creation a long-lived plant which generates harmful (to other species) radiation. If it could be immune to its own radiation, the primary benefit would be that the plants offspring can spread easier and more quickly due to other plants and animals in the area being sickened.
How cou... |
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For a (Super super super soft)Sci-fi RP I've been planning, I've been trying to design an alien race to act as a suitable antagonist. The basis of this antagonistic race is that they are far, far more advanced than humans, and sought to destroy us before we achieve interstellar travel, so that we would n... |
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Imagine a red dwarf star orbited by a considerably Earth-sized planet in the star's habitable zone. Assuming the planet has a sufficiently powerful magnetic field to protect its surface from the star's radiation, and life thrives on the world, what would be the most efficient pigment for plants on that w... |
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An ancient civilization mapped wormholes when the universe was quite young and smaller. This allowed them to reach other galaxies (wormholes from our galaxy to others). They mapped it all.
Humans found their maps in recent times, and now humanity is able to reach anywere in the universe thanks to those m... |
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We've discovered stars that are contact binaries. This means that they orbit so close together that their photosphere reaches through their Roche lobes and links the two stars together.

This started me thinking about the possibilities with respe... |
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If our atmosphere was much thinner (half as thin as we have now) how would animals and humans evolve? Would we evolve completely different? Would we have a quite barren planet? Let's just say that some major disaster caused this back when the dinosaurs existed. Well something that happened that took half... |
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I'm in a project with other people where some of us, me included, prefer to go from general aspects to more specific details (top-down). But others do not share the same view and because of that, I feel the project is crawling to a halt.
I don't think any one approach can be considered objectively better... |
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Let's say the world's natural history evolved along much the same lines, but the modern species of large herbivores we're familiar with - ie cattle, deer, elephants, antelopes, etc - had to deal with large flying predators ie dragons. Lets make these dragons look more like wyverns so they fit in with oth... |
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Imagine you are in empty space, and a 15 megaton nuclear bomb is very close to you (D=200 meters), but what's also very close to you is a giant (Tungsten?) cylinder (2? meters in diameter, 100? meters long) aimed directly at the bomb. If you hide behind it, the radiation and plasma should fly by you *for... |
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On Earth, half a century in the future, a scientist discovers a way to create a shell around mass to make it functionally not-exist temporarily.
The shell is fairly hard to make, powered by a medium-sized battery pack (about the size of a car battery) and liquid helium but creates a large high-voltage pu... |
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I'm currently working on the following concept of a world for a high fantasy setting:
* The world's core has a radius of around 100 km. Inside is a magical object that creates a large-scale (planet-sized) gravitational field around it.
* The core is enveloped in a mantle of around 10-15 km of water with ... |
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Let's say that you have a person who's, if certainly not immortal in the general sense, biologically immortal, as enumerated in [this question](https://worldbuilding.stackexchange.com/q/218332/87100) - not only do their telomeres never shorten, they're also-near-immune to cancer. This means that, while t... |
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Fungi that control ants and other other small animals, internal parasites with authority over their victims...... old story.
I'm looking for an external parasite with authority over their victims.
The authority can't happen through:
-Speech
-Money/currency/assests: it must be parasitism not an exchange o... |
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A significant character in my story is a young man, late teens early twenties or so, who shortly before the story began had his mind wiped almost completely. All memories, all knowledge, and all skills more complicated than what an animal can do were completely wiped out of his mind permanently. Shortly ... |
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While on earth it usually rains water, it usually isn't a sight to behold. To spice things up, I would like the rain to truly remind its colonists that they're on an alien world. However, this exoplanet has an oxygen and nitrogen based atmosphere. Which brings me to the question: What liquid might rain i... |
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There are already questions like
[this](https://worldbuilding.stackexchange.com/questions/193514/creature-which-sets-itself-on-fire-and-rebuilds-its-skin-aftwards-would-cancers#) (creature which set itself on fire for defense) and [this](https://worldbuilding.stackexchange.com/questions/191304/how-would-... |
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My sea dragon is as large as a bottlenose dolphin (it looks like Lapras from Pokemon, but that's not important) but instead of breathing out fire, it has the ability to expel boiling water from its mouth.
**Question:** How do I explain the sea dragon being able to produce this boiling water?
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I am exploring alternative domestic animals instead cows, while still using a cow-like animal. The question I ask is in the title, and is pretty self explanatory
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Wisent (*Bison bonasus*) are probably the closest in terms of niche to the aurochsen, given their ranges overlap significant. Wisen... |
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A long time ago, the 60 foot long [Megalodon](https://en.wikipedia.org/wiki/Megalodon) roamed the oceans. Fast forward to 2.6 million years ago and they went extinct. In the story I'm writing [Megalodon](https://worldbuilding.stackexchange.com/questions/171114/what-would-be-the-repercussions-of-megalodon... |
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[Pegasuses](https://en.wikipedia.org/wiki/Pegasus) in most works of media are often depicted as hexapods with four legs and two wings:
[](https://i.stack.imgur.com/U1y5p.png)
The only problem is (from what I understand) no vertebrates o... |
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Next to angels, various types of bird people are among some of the most common depictions of flying humanoids. Revali from BOTW comes to mind.
[](https://i.stack.imgur.com/F4Nih.png)
Could birds (or any other flying animal for that matte... |
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In the story I'm writing, three humans with stone-age technology and no knowledge of space accidentally awaken thousands of cryogenically preserved humans.
These humans immediately get to work on reaching space due to the presence of an AI gone insane from existential dread on the planet they are on. Th... |
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My world is a drier variant of Earth and the civilization there has built a massive canal network that is used for moving water from the pole to the temperate zone as the temperate zone is lacking in water.
The original builders of the canal network are gone and civilization has regressed back to ancien... |
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**Laser-stars** are war-spacecraft optimized to accommodate a huge laser weapon capable of eliminating an enemy thousands of kilometers away. They will usually have enormous radiators to deal with the waste-heat of their lasers and to cool the lasers further to reduce thermal lensing to keep the beam qua... |
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A planet much like Earth orbits a star much like the Sun, but with one difference: the energy from the star is magically transformed into sound within the planet's atmosphere. There is no longer starlight, only starsound. Every point on the planet is still bathed with an equivalent amount of energy, but ... |
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Can we make a human brain and body the size of a mouse’s while still retaining the same level, if not more intelligence?
Like how tech has evolved to be smaller but more efficient or how cars are more fuel efficient than they were years ago. I'm trying to make a story where you have mini humans who were... |
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Are there any unique challenges life would face evolving on a planet orbiting a Cepheid Variable star? I'm aware this is a broad question, so to narrow it down, consider this a question about Great Filters, in the sense of the Fermi Paradox. What sorts of challenges unique to a Cepheid Variable star coul... |
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Mermaids are commonly depicted as mammalian, human-like creatures from the waist up and scaly fish-like creatures from the waist down.
What properties (color, texture, etc) would their mammal skin likely evolve to have while living under deep water?
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Assuming you're asking about human skin, no... |
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As my presence on here may imply, I am creating a story, and am currently working on the worldbuilding side of operations. One of the things I am trying to do is get a good map going, as my brain is very spatially-oriented. The story takes place during the late Cretaceous, so I already have a map I am ru... |
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Many believe that sex before a competition can have a negative impact on performance in combat, speed and strength sports in males. Athletes from strength and speed sports showed decreased performance up to two hours after sexual intercourse. The most likely cause of this is lower testosterone levels in ... |
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**This question asks for hard science.** All answers to this question should be backed up by equations, empirical evidence, scientific papers, other citations, etc. Answers that do not satisfy this requirement might be removed. See [the tag description](/tags/hard-science/info) for more information.
They... |
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There exist humans on a world with **35% the gravity of Earth and air five times denser**. These people have invented wingsuits with extensions that go past their arms and enable them to fly by flapping their arms.
In the same way that certain body types make people better suited for particular sports (... |
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Would it be realistically possible for a firebreathing dragon to exist on an omnivore diet, but only eat fish as the main source of meat?
The dragon is at this time in my story, a juvenile and can fly, and breathe fire, although fire breathing for him only seems to occur when he gets mad.
As a young dra... |
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My current ongoing project, about which I've asked many questions, is about a world in which evolutionarily plausible legendary and folkloric creatures roam the Earth. One such creature is the sea serpent. In my world, sea serpents are giant relatives of moray eels which use constriction to kill their pr... |
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So, I made the slight mistake of worldbuilding by starting off with just a planet's local sentient species and working from there.
This species, the Trillek, have a more or less theropod appearance with some minor anatomical differences, the most jarring being a prehensile tail with two additional opposa... |
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There is a ritual that allows a mage to steal the soul of another person. This adds their mana to your own, making your magic more powerful. It also extends your lifespan and makes your physical form stronger and more durable. Absorbing mana from numerous victims in this way can make you almost godlike. ... |
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This is a second question about the same world described in [this question about human reaction to an alien world](https://worldbuilding.stackexchange.com/q/127031/11664).
So here's the idea: human beings travel to and land on an Earth-like world with the intention of colonizing it.
This world is remarka... |
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So I want to have an alien creature on a planet with a halogen atmosphere. It will have to be at a temperature where the hydrogen halide is liquid or solid.
This hydrogen halide I would have as the main useable component of the creature's blood as a substitute for water along with some halogen gas carrie... |
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I'm creating a creature that possesses an outwardly Chelonian-like appearance. However, the creature is bipedal. Specifically, the creature possesses upright, pillar-like hind limbs, as well as a Kangaroo-type posture.
However, this was when I began to wonder -
**Can an otherwise Chelonian-type creature ... |
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I've been trying to come to an answer for what conditions need to be in place to allow for the formation of a permanent or at least a long lasting weather pattern, in this case a large storm. I would like to establish that a certain area of a planet I am working on has a large storm that has been there s... |
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Hi everyone I would like to ask if this material is suitable to be used as body armor like kevlar, as I am planning to use them as armor for my novel.
What are the drawbacks to this? Could the armor resist, stabs from spears or swords or arrows, can it withstand blunt impact? It seems that this material... |
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I'm making a simple planetary system with a primary similar to our sun and a planet like our earth.
This earth analog has a moon similar to our moon, just smaller and closer.
How do I calculate the period between eclipses, given all the orbital parameters of all bodies? There must be some fairly simple... |
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In my universe, coilguns/railguns are popular weapon in ship-to-ship combat. But, they also have a place in orbital bombardment, as a ship on low orbit can hit a ground target in few seconds using relatively cheap weapon.
The question is, what is the optimal shape for a projectile in magnetic cannons, t... |
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So I'm working on a story that at its groundwork has a lot of sciency things, and then has a lot of unsciency things attached to it. The story has an FTL drive which is the good old "fold space, puncture space, travel through" methodology. As a restriction, folding more space (i.e. traveling farther) req... |
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The legends of lycanthropes go back eons; while they have changed over time, a common modern expression of them is of an infected or cursed human that is given the power to transform into a wolf and/or a hybrid canid-humanoid form either willingly or when triggered by certain events (anger, full moon), i... |
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**This question asks for hard science.** All answers to this question should be backed up by equations, empirical evidence, scientific papers, other citations, etc. Answers that do not satisfy this requirement might be removed. See [the tag description](/tags/hard-science/info) for more information.
If $... |
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The title society is in a remote mountainous jungle region, with lots of caves, underground lakes, and even an inactive volcano. It is very similar to the jungles of southeast Asia.
The people who inhabit this region are not savages, they live in a refined society that values knowledge above all, youth,... |
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The rock is spherical.
All arthropods are included. They have no time limit and are "programmed" to cooperate, but lack intelligence.
While there is no time limit, the insects do this transportation in the most efficient way possible. (Assume the most efficient method you can think of.)
While this questi... |
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[](https://i.stack.imgur.com/MYq1J.jpg)
This is the classic winter picture of a boreal forest, or taiga. This habitat exists only on subpolar latitudes, where the climate is too extreme for broad-leaved angiosperms to take root, thus mak... |
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First the reality-check:
In a sci-fi world where humans have interstellar travel but "nice" Earth-like planets are rare, what reasons might an algae farm be "better" than a plant farm, especially concerning the proletariat people living under artificial conditions (orbital ring, aerostat city, archology,... |
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Say an individual was born with uncontrollable intermittent ESP. Rather than something fairly innocuous like seeing ghosts, his ESP sees things from beyond. He'll randomly pick up stimulus from a surreal, unpleasant, parallel universe that will interfere with his perception of his own reality. This is pe... |
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In a distant future, humans have colonized every corner of the solar system, and we can easily convert any object into anything else - be it food or a tricorder, you name it. Using these replicators we can control standard and quality down to atomic level. so I reckon that the practice of agriculture wil... |
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Would it be possible to somehow inject astronauts cells with safe amounts of magnetic metals, or use some sort of magnetic properties, to hold them down to a space station floor with magnets?
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Magnetism follows an inverse cube law, which informally translates to "pull gets *much* weaker even a... |
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In the future, AI systems sanitize humans as they walk through doorways. Home surfaces self-sanitize. Food is mostly 3D printed from cleaned particles, including Vitamin K and possibly some probiotics to aid digestion. Humans are not forbidden from leaving the protected city, but few do. There's minor ba... |
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I want to have a world when humans got serious about global warming and succeeded in making [Lithium Air battery](https://en.wikipedia.org/wiki/Lithium%E2%80%93air_battery) work. Since the lithium air has same potential energy density as gas, and electric engine is simpler and more efficient industries r... |
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Kind of a "universal donor" or "universal recipient"? Aliens that can take on the qualities of several kinds of species and recombine them to make a kind of "super" being?
[Answer]
Sorta yes. It may be possible, but not likely.
One issue is that we don't know if all life would be the same handedness. ... |
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My setting is a habitable moon with freestanding water orbiting a gas giant. Originally I thought the gravity of the jovian world would tend to draw water toward the tidal bulge of the moon itself. The more I read about even relatively simplistic terrestial tides the more confused I've become. It appears... |
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Lets say humans from an alternate reality find a modern day laptop floating out in space and bring it back down to to study it. The humans are a little less advanced than us and are very curious what all those different shaped holes in the side of the laptop do, so they decide to make their own USB and t... |
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As in, could [negative matter](https://en.wikipedia.org/wiki/Negative_mass) (N.B. **not** the same thing as antimatter) exist on the macro-scale as a solid, liquid or gas without the weird effects that cause it to [repel normal matter and possibly violate conservation of energy](https://en.wikipedia.org/... |
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In my world , a race of sea faring half elves now possesses 18th century maritime technology , and 16th century ..... Everything else. Given that they spend most of their time at sea , they lack -
A) Gun powder , since potash is scarce on the open ocean
B) Coal/Wood , with which to generate the steam eng... |
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I am a clockmaker: I work with time and can control it on a small scale.
One of my powers allow me to return some minutes back in time after having experienced my death, but I remember everything that happened.
What psychological problems can reach me repeatedly living this experience?
EDIT: A note to cl... |
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The premise for the the world I'm building is that the Superpowers of Earth lost an interplanetary war with the Colonies of Mars. As a result, most of Earth's governments have either collapsed or have been reduced to third world countries. Some communities are reestablishing themselves, one of them is th... |
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The cryogenic magic I am considering functions like this:
* When the magic is applied to an object (a stone, some water or air), it forces the molecules, atoms or other subatomic particles of the object to release its thermal energy as photons, thus causing the object to glow *and* cool.
* In reality, al... |
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