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I am trying to design a single seat fighter capable of achieving (or getting close to) hypersonic velocities at high altitude. In this universe I am assuming compact fusion is a common technology. ...
Any story about an independent, self-owned tramp spaceship crew tends to implicitly or explicitly raise the question of how the crew got a spaceship, how it afforded it, and why it doesn't just sel...
I have an Earth analog that is nearly completely covered in ice and glaciers. I want to have oases of warmth scattered across the planet. These oases aren't tropical by any means, having just enoug...
Ruins of buildings, abandoned cities and suburbs dot the coasts of Earth's landmasses, inhabited by wild animals and the pieces of a once vibrant civilization. The oceans are relatively empty, the ...
Background: In the early 2020s a magical life-extending "elixir" is created but is in short supply. However, a very reckless individual steals most of the US's supply and drinks a sufficient amount...
So a friend is working on a worldbuilding/rpg project and I'm "beta-testing". He drew up an earth-like map and set the players start locations. Then I ask him about fauna. Will it be modern earth? ...
Basics: There is a wormhole in a fixed position within a solar system. It is roughly 40 million miles from the orbit of the habitable planet, which kind of mimics Earth (roughly 12 month solar orbi...
Modern Earth; a series of connected events (natural disasters, mass migration, drug-resistant pandemic, collapse in biodiversity, armed conflict) have led to a significant reduction in human popula...
If a spaceplane like the Rockwell X-30 existed and was flying to a location in geostationary orbit, would it be substantially more efficient to take off from a runaway at the equator, or would it n...
I'm interested in creating some construct of a society in the Twilight and Midnight zones of the ocean. By what means could they mine, farm, and trade in what is suppose to be a more futuristic so...
Earth's deepest point, the Challenger Deep, is almost seven miles below sea level. By contrast, Europa is smaller than even Earth's moon, yet its oceans are anywhere between 40-100 miles deep! So t...
Insects and other land-based Arthropoda are stuck at the size they are due to how inefficient their respiratory system is. They were able to reach the size they did in the Carboniferous period beca...
In this scenario, I would like to focus specifically on humanoids (read: human shaped blinking eyes, protected by eye-lashes and evolved in a waterless environment and fitting human eyesockets, fro...
Say I have a planet with 10-20 moons of varying sizes orbiting it. If one of these moons were to explode/shatter into tiny pieces (I know this is probably impossible, but if we pretended it were po...
In a near-future sci-fi world, I described a disease with the following characteristics: Affects human female children (not necessarily exclusively). Is a neurodegenerative or similar disorder,...
As far as I could gather the digestion relies on enzymes which in turn set requirements for pH. Is it possible for an alien creature to have a different set of enzymes that require basic environme...
What would happen to an earth-like planet where an event caused a large (think, the size of the Caribbean tectonic plate) section of the crust to get peeled away, exposing the upper mantle for a pe...
I am toying with an idea which requires a human to be stuck in a dark box for the rest of their life. They receive regular exercise of the arms and legs, air, food and water and their bodily funct...
I'm designing an alien species, whose blood is highly acidic and can easily cause someone's hand to melt down. It's pretty similar to the Xenomorphs from Ridley Scott's Alien, except for the color ...
Some humans have been genetically engineered to be able to detect ionizing radiation to better survive the harsh environments found outside of earth's protective magnetosphere. What could be the ph...
I was working on a side project to design an alien fleet that is wandering in the universe, and harvesting energy from planets for their needs. While I can think of ways to make that happen (geothe...
Humans are the equivalent of bacteria to planet-eating monsters. And since, as we all know, eating humans is dangerous business, these monsters have decided to cook our great planet Earth before ea...
Could there arise naturally a plant that like mistletoe attaches itself parasitically to an oak tree that can interbreed with a regular apple tree, and produce fruit that are very similar to apples?
I am currently writing a species for my story that can self generate UV radiation by consuming cinnabar/mercury ore, being immune to mercury poisoning, converting the mercury into a vapor that inte...
I've got a D&D-inspired setting, and one of the races present are yuan-ti. They're sentient snake people with a variety of forms, ranging from mostly human-looking to basically just a giant tal...
