General Q&A about worldbuilding and other speculative developments that can be extrapolated from science.
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The setting is as follow. In a planet like earth, one day, 10% of the population suddenly becomes immortal. The "immortals" are not physiologically different from the "mortals" and initially it is ...
Pretty much every vehicle ever invented has been used for racing on at some point, so it seems likely that people would want to do the same in space. However in space it doesn't really work the sa...
If a human somehow managed to change their body in such a way that self sustaining was possible and they did not need any outside sources to maintain themselves, does that mean that they cannot gro...
I'm trying to create basically realistic mermaids, and working on developing body language and vocalizations. I have most of the vocalizations I can think of (suggestions are still appreciated), bu...
This world has gravity, air, and clouds. If humans are weightless yet still has mass, it's gonna take some force to accelerate them. How fast can they move on air, say, if they had fins like divers...
I am working on a species that ressembles humans beings and that, although slightly engineered in the sense that the evolutionary leaps are aided by genetic modification, they are left to go throug...
Some follow-up thoughts on this question... Hydrogen isn't very soluble in water. Oxygen is more so, but still sufficiently insoluble that most oxygen-breathing Earth creatures use special oxygen ...
So, my setting operates with some futuristic tech, which turned out to be pretty lame (especially nanomachines, they're just fancy pants medicine). Therefore, to spice things up, I encased it in a ...
The planet in my story, Ser, is actually in reality a moon orbiting a larger body called planet Rea. Ser is located in the L1 Lagrangian point, which means it takes the same amount of time to orbit...
Trying to figure out how much a 1 foot tall fairy would realistically weigh using these 2 guidelines Fairies are just scaled down humans. Their bones are not hollow because their flight is assist...
I'd like to know if a climate with snowy and gloomy winters and rainy and cloudy summers is possible. Because the climate of Russia in summer is sunny enough and the Icelandic ones isn't so snowy....
A friend of mine has a race of creatures in her headworld and has been wondering about a biological answer to justify the color of her race's blood even though magic is a bit sprinkled in there. ...
I mean as in a city that is not situated at the bottom of the ocean but is not floating on the surface of it either. What would a plausible size and population size be for this kind of construct? C...
I am developing an alien race whose homeworld is a Dyson sphere planetoid (they used collected planetary and asteroid matter to construct a "hollow planet" around their sun, along with "night" sola...
To be able to colonize another world, there are some requirements; the harvesting of energy, enough recourses, handling of the environment (pressure, temperature and gravity and so on) and availabi...
Have a creature that doesn't really need vitamins or minerals, it only requires energy which goes through a energy-matter conversion to build what it needs. Radioactive materials would be great sou...
In my world, humans live on a moon of a gas giant that has extreme weather conditions. They also: have crystals that can store energy. possess the ability to make floating islands (on which they...
So, let's say there's a white dwarf star that has recently been born (by recently, let's say about 3 million years ago) Now around that time, a rogue planet, about the same size and mass as earth, ...
A rare design I have seen in fantasy games is a wyvern or humanoid being with hand like wings to fly I'm curious if this is in any way a practical design and the reason something like this would ...
We have all heard what too much CO2 can lead to, but so far the biosphere have never been exposed to too low levels of CO2. But what if it did? And please, this topic has nothing to do with the ong...
In a close future (in 100-200 years), humanity is in an energy/resource crisis and seeks new resources in the solar system. In my story, humanity, still in need after colonizing the moon, sends a m...
A bit outlandish, but here me out: I'm trying to make a villain for my story who's essentially like DC's Fallout in powers. Attribution: January 2015, dc.fandom.com/wiki/Fallout That being said...
How could a creature explode itself? Why would it? We see example ideas of these all the time (Scourges, creepers, etc.) but nobody ever said how or why a creature would intentionally explode. I...
This planet's atmosphere has oxygen at a partial pressure that is breathable to humans, and the rest of the atmosphere is, at least, not made up primarily of Nitrogen (that is, it's not just Earth'...
Making a semi-realistic Kirby Alternate Universe (AU) here. Popstar's shape is a result of a member of this powerful race using secret magics to alter reality in this AU. What would its day/night ...
I have a planet similar to Venus(similar size and atmosphere) that has floating continents in the atmosphere due to strong magnetic fields. If it is possible, what would the continents need to be m...
So in theory, I would want this planet to have the same everything as earth besides the radius (and anything that affects how radius plays into gravity). I know the density of this Planet X would h...
For my space-fantasy setting I'm considering using the concept of Hollow-Worlds. I devised in-universe reasons for the presence of a day night and season cycle. The Hollow-world's "Inner-sun" cy...
Exactly what it says on the tin. Kleeber the warrior is wearing a gambeson and carrying the standard adventurer's gear (leather backpack, 100ft of hemp rope, bedroll, spare clothes, waterskin, dry ...
A spin-gravity space station, a ring-shaped structure that creates a faux gravity on the inside of the ring via inertia, has been depicted as no bigger than a house and as massive as a solar system...
I am building a country in today's Argentina (32°-40° latitude) where Europeans would have settled in 10th century. Would their skin color change over that period?
I want to build a world that has its geographic poles travel like the Earth magnetic poles do. What is a plausible way to do this? (besides giving it two suns that is)
Related, and in continuation to The Challenge of Controlling an Advanced AI. At this point in my story, I'm assuming a got-out-of-the-box-AI scenario, where no singleton (a single self-coherent dom...
I want a character to get sucked into what she thinks is an FTL-wormhole-gate. While it turns out that the gate is indeed a traversable wormhole, it does not allow for FTL travel. The gate transpor...
TL;DR: I want a society which behaves as a hive. Is it plausible and how to achieve this? The setup: Different planet in our universe. In other words: Normal, physical rules apply, there is no mag...
Is it possible for an organism to evolve a capacitor if the conditions were right (carnivore that stuns fish, living in complete darkness, etc.)? What kind of challenges would there be to evolve so...
I intend to write a character that has the ability to turn nearby gasses into plasma for combat and utility purposes. However, I've been studying how plasma works and (as someone who is not as savv...
Inspired from people walking on water using cornstarch plus myths such as monkey king, several gods in heaven/celestial palace, and other fiction works. (image from Dragon Ball by Akira Toriyama) ...
Gray skin and red eyes is a common look for Dark Elves, and I have a similar race in my own world. But what would physically cause such an appearance? Hard Requirements: Must not be the result o...
Y'all should know by now that I want to build a Death Star ;-) Let's assume that we did that already -- and against the odds, we've built two of them, and they're currently in orbit around a plane...
Gravity does exist in this world, and so does air and clouds. But this creature only has enough weight to stay in the air without falling or being lifted up. It's big like a whale and it does have ...
If every star and planetary system and blackhole"”all mass (not sure whether to include dark matter or not) except what directly makes up our solar system"”in the Universe except the Sun were wiped...
I'm conceiving of a world where humans can readily terraform worlds that were once considered "dead" due to the planet's magnetic field being long gone. In such a situation, what could humans do t...
On this parallel earth all vertebrates received the ability to efficiently produce super strong materials from readily available minerals/nutrients in the mid Triassic. The specifics of these comp...
The main character in my setting is a human with red irises. I know that severe cases of albinism can cause somebody's eyes to appear red, but that's actually caused by light reflecting off the blo...
Background I just read this question about how to get a planet to have one hemisphere with tropical climate and one with polar climate. The (not yet accepted) answer with the highest score recomm...
Movies like The Matrix and video games like The Evil Within have popularized the idea of a simulated reality. I'm talking about a human connected to a computer and able to experience similar thing...
According to a recent National Geographic article, astronauts returning home after longer missions suffer permanently impaired vision. This is a problem that must be addressed in hard-science world...
I'm writing a short story about space faring race of people. I want to emphasize how technology has allowed a casual approach to space, making it seem like only a minor inconvenience or hazard. O...
A moon-sized asteroid approaches Earth in the near future, where space tourism has become normal. The Earth has a few satellite structures above Mars conducting research, as well as successful terr...
