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I want to render impractical the deployment of satellites by exploiting the Kessler syndrome. Why, you ask? Maybe I'm an evil overlord and I don't want those pesky satellites flying over my lair. ...
Most gases that are toxic to breathe also do nasty things to the skin when they're in the atmosphere at dangerous concentrations - and one is walking around without sealed protective clothing; sulf...
In my fantasy world, the magic system pretty much makes metal armour and weapons obsolete. The magic system's specifics aren't important, just note that the magic system allows the users to 'penetr...
Edit: It has been suggested that my question is a duplicate of What could humans do to render the earth uninhabitable?. That question only asks what would be necessary to make human life impossibl...
In the far future the posthuman successors of mankind have disassembled the stars and live on ultra slow and ultra efficient solar system sized computers, Matrioshka Brains. The last enemy of intel...
I am attempting to design aliens that live in a universe with a 4+1 space-time--i.e., a universe with four orthogonal spatial dimensions, rather than three, in addition to a fifth time dimension. I...
I'm building a S-Type binary system where the primary star is a black hole. Yet the system formed as a O + K-Spectral class binary and the 20 solar-mass O giant went nova 2,7 myr after both the sta...
One of my ongoing projects is what I think of as the "constructed worlds gallery", a series of Megastructures as settings for stories and games, including things like the "Flying Pie-plate" a world...
The details don't matter, just that a large fraction of people have died (let's say 90%) and society has completely collapsed. It's only a year or two later, and people have started to gather toge...
Would potato- or grain-like crops be able to flourish in northern alpine regions? There's a lot to be said about the Andeans, but the have the benefit of living near the equator that other civiliza...
I have a Gas Giant with 13x the mass of Jupiter. How many satellites of Earth size and mass can it hold safely in its orbit? Edit: This gas giant lies smack dab in the middle of its parent star's ...
Assume a civilisation with futuristically advanced knowledge of biochemistry. Assume it wants to develop a cybernetic device meant to facilitate the organism's ability to perform high-power activit...
Would it be possible for a planet to naturally have a moon or large natural satellite at one of its Lagrange points? If so would it then also be able to have a second moon that would be orbiting t...
Lets say you have an average-ish magnetar "” about 3 solar masses, with a magnetic field of 108 teslas (it's decayed a bit since it was born). Now lets say we have a solar system with a small-ish ...
This is an edit of a previous question. It has been edited so I can be more specific in my asking, as I'm still confused after looking at the answers to a similar question to my original. I have a...
In a world similar to ours, a mad scientist is bent on preventing the ascendance of one certain individual over the rest of the people inhabiting the northern part of the continental America, also ...
Suppose a starship is being powered by a lasers beamed first from the departure star, and then from the destination which is a moving base. The ship is moving in the regime of 10"“30% of light spee...
While the vampire is a monster of folklore, modern technothrillers (e.g. Federal Vampire and Zombie Agency, Ultraviolet, Blade, Underworld, Daybreakers) have portrayed vampires as humans infected b...
In our universe infinite energy is not possible, at least given the known laws of physics. But in another universe what would allow for energy to be in the same amount as space? But how large i...
It is 2057 and a manned mission to Europa has been comissioned in the prospect of further exploring the ecosystem and energy signatures of Europa. Unlike the implied unnmanned probe, this mission ...
Not a tank that could survive being shot with a 1 GJ railgun (pretty sure nothing can survive that), but a tank that can withstand the recoil of a 1 GJ railgun that's been mounted to it. Obviousl...
A livescience.com article claims that trees can reach a theoretical height of 400 to 426 feet (122 to 130m). This is due to the tree being unable to carry water up to the top at that certain point ...
In Lyman Stone's fantastic blog post about George R. R. Martin's A Song of Ice and Fire series, Stone mentions that the seasonal cycle of Westeros is very unrealistic. Here's the truth: Medieva...
I have seen a few similar questions but none seem to take the density of a planet into account. I'm creating a planet on which several small civilisations develop. The planet needs to have a few bi...
A terrible virus has made most of the populations and government officials of the largest superpowers on Earth stark, raving mad, without depriving them of their intelligence. They have decided t...
