General Q&A about worldbuilding and other speculative developments that can be extrapolated from science.
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Double or binary planets are a really cool science fiction idea. A second Earth hanging ominously in the sky. Co-orbital or trojan planets are also interesting in that you have them on more or less...
The characters in my world use oxygen spheres like the top answer to this post (a leather balloon filled with air) to safely traverse land filled with smoke. How would you know when you are runnin...
Is there a feasible setup where the Sun has expanded enough to make the Earth uninhabitable, but some of the other rocky bodies in our solar system (past Earth) become more reasonable colonisation ...
I am currently working on a character backstory for somebody whose fictional character gets sent back in time an era before his species existed (essentially to bronze-age times or even earlier, it'...
I am working on a world where an event, like a celebration, occurs during every lunar eclipse. I would like to have lunar eclipses occurring more frequently--maybe even once a month--in order for...
This story takes place about 300 years in the future and humanity has since come into contact with hundreds of alien races, you get the picture. Basically, I have this character who is half human a...
From what I understand, Mount Everest grows about 2.4 inches per year. I am trying to create an area of land that grows very often, often around 1 inch per day. As I'm not very good with plate tect...
If we assume a terraformed Ganymede has a global ocean roughly 800km deep, that food is bountiful, and that it has been populated by a variety of life from Earth, how large could these creatures gr...
The setting is a science fiction story set roughly 500 years in the future. Looking at Wikipedia, I see a number of baryons that have so far never been observed. I'm interested in exploring this s...
In my story, set in an earth-like world, a marine species that had evolved a melon organ, much like that found in our dolphins, made its way back into the "land" (a large system of underground cave...
So, turning people into stone. You only have to add reversibility to the mix, and it becomes the BEST paramedical tool available. But, what does petrification need to accomplish to become just tha...
I need a planetary system for my novel where an Earth-like warm habitable planet has an orbital period of about 650 to 730 days. I know that is similar to Mars and that Mars would be too cold. What...
The Greek gods were sufficiently advanced aliens with access to powerful technology. In the begining of our worlds formation, Zeus created mankind from his own flesh. These mortals were made in the...
My idea involves an alien spaceship inside a roughly Earth to Mars sized/massed planet, but the whole planet is displaced when the drive is activated. If you wanted to travel back to our solar syst...
How long can objects made of hard material last at room temperature in otherwise ideal conditions? If left outdoors on Earth, over the course of millions of years, any material will be eroded by w...
I did a lot of research and asking questions about dragons' breathing ability: if there was a dragon that spits pyrophoric liquids like a spitting cobra A tiny fire-breather can any animals (exam...
An area of my planet is very saturated with lava. Being quite similar to the Siberian Lava Traps, it is essentially a lava sea. This lava "sea" area isn't necessarily all lava however, as there are...
in most science-fiction stories that include alien races, said aliens have a roughly humanoid appearance (being an erect bipeds). now while it's likely that the vast majority of sapient life (being...
One of the respondents in this thread suggested a 7-sex system with the following features: An idea I came up with years ago was a variation on the male/female/carries-offspring idea. This spec...
For context, I was reading about various research groups installing implants and cameras onto insects to use them as reconnaissance drones in high risk areas. I'm wondering how feasible it would ...
In many fantasy works, the world typically has giant caverns that house entire civilizations and ecosystems that are (mostly) disconnected from the world above. However, this concept, at least in ...
"Serina" is a popular speculative evolution project in which, apart from a long list of fish, invertebrates and plants, the only terrestrial chordate to colonize this terraformed moon is the canary...
I'm working on a story where there is a crime scene where the protagonist (who has a superhuman sense of smell) notices a scent that smells like human corpses due to their abilities. I'm wondering ...
I'm new to this and my scientific knowledge is massively lacking in this area (so please take it easy on me!) I'm writing a historical science-fiction novel. Parts of it set in the past (1977) and ...
So, when you use a dragon for military purposes, it's probably for the best to keep them close and keep them happy. Which means building them a place they can call home. Now, housing a dragon is q...
I know theoretically the human stomach is above the centaur's stomach so the obvious answer would be no. But seeing as centaurs aren't real and we don't know what their internal biolody would look...
My project concerns a world "A", that is a moon of a gas giant "Jovi", in a solar system with no other planets to speak of and a host star much like our own. "A" is Earth-sized, has no magnetic fi...
In my story, there is a planet. The planet's name is not really important for the sake of this question, so we're going to refer to it as "dead planet". Background: Dead planet is entirely hot d...
In the deep, outer reaches of our galaxy, there is a rogue gas giant which, due to an unfortunate event, was flung from its native orbit into interstellar space. It has a mass 12 times that of Jupi...
Let's say you have a planet about the size of Earth. It has three moons, each roughly the mass of one-third of the Earth's moon. Would this cause tides of different magnitude than those on Earth? A...
My "magic" mirrors are purely technological and are only able to transmit light. More precisely, they can display the visible and infrared spectrums, and communicate via radio waves. They're basica...
You are Alien McGee. For some reason ( don't ask why ) you need to hide an artifact in our solar system for roughly 20,000 years before coming back and taking it. Said artifact is a magical vase ...
I'd like to create a land-based mammal that uses its electricity NOT for navigation or hunting, but only as a defense (enough to stun creatures approximately its own size or marginally larger, with...
In this world, people have the legal right to fight anyone to the death, for any reason, as long as the fights are done before an official whose sole job is to regulate these duels. The officials i...
Imagine an alternate universe where FTL do happens, let's just say the inhabitants discovered a hypothetical particles that allows ordinary matter to temporarily be in superposition of any amount o...
I am creating a fantasy world in which Earth has a second moon with an orbit between Earth and the current moon. The orbit of this new moon is faster because it's closer to earth. I'm not much co...
For the purposes of this post, "word" is defined as a unit of language such that Has some meaning on its own, often relating to the real world. Complex utterances can be formed simply by transmit...
So, as I understand it, the spacecraft would need to move in the opposite direction to the orbit. Are there any calculations I could make to attach a clicking-tock onto this? If the spacecraft were...
The moon is similar to earth but orbits around a gas giant, the sun has ended its life cycle and so the only energy received on the moon comes from tidal interactions heating its core. On earth an...
Basically, the title. Trying to figure out how reasonable stealth in space would function, and while I have mitigated it, I am looking for methods to improve it. But mainly, is creating a sort of h...
My low-fantasy setting features the deadly plant known as the wormberry. It produces small berries of a bright-but-overall-undecided color, all of which contain a small, edible seed. They have two...
There are several questions related to effects of different gravity levels on the human body, but none adequately answer a fundamental question: What is the maximum and minimum gravity that nearly ...
We may all have some familiarity with winged skulls - from Avenged Sevenfold's album covers to bikie shirts. However, for my science-fiction/horror story, I am curious about how these creatures wou...
My postulated creature will look something like this: or like this: Its description is as follows: it's a non-obligate carnivore its height is, on average, about two feet it lives in arid h...
The MC1R gene turns pheomelanin into eumelanins but there are another kind of pehomelanin called pheochromes. So if a brunette or black person used a cosmetic gene therapy to turn off this gene how...
Suppose, for instance, you lived in a world filled with nasty monsters and other creatures of the night, all of whom wanted to kill you and eat you in various ways. Now, the good news here is that ...
I was thinking of a story with a Werewolf as a detective, using mostly conversational skills and his sense of smell to solve crimes similar to many of the UK types of detective stories (Morse, Lewi...
So how large of an organism can a diet of strictly of blood support? In a modern Earth setting it might be a bit hard for a large hematophagic organism to find a suitable group of prey that it won'...
Working on a medieval setting I thought of the idea of a biome similar to Minecraft Ice Spike Plains where this ice structures naturally occur. These structures in particular are tall and sharp tow...
Death, most if not all of us fear it. However, it may be possible to postpone death for a while, and hopefully entirely. One major way of postponing death for awhile is through the biological route...
