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Time period is renaissance, with the most powerful culture being in a area geographically similar to the middle east. So a cleric was trying to combat a drought in his kingdom using the power of a ...
In this case the person would experience 292Gs by the end of the 14 months, which should be enough to kill him/her but, considering that it would have taken 14 months for the environment to reach a...
In our universe energy is conserved. In a parallel universe could energy divided by distance be a conserved quantity instead of energy itself? So in this universe if two objects were to move away...
I read recently that metal-rich planetary systems around large (>5 solar masses) O- and B-type stars can form enormous solid planets (potentially bigger than Jupiter) relatively quickly, photoev...
They say all is fair in love and war. When we plan to invade our enemy's planet, we don't want fair. We want to strike them while they're down. We infiltrated sleeper agents in key points of their ...
Watching movies and superhero cartoons, I'm struck with this question: what material do they use for their masks? A lot of times, for the bigger over-the-head ones, artists seem to favor plastic, s...
I've got a near future setting where humanity has colonised the solar system. The setting is relatively hard science fiction, with realistic spacecraft and space flight. However, it is also a setti...
I've designed a creature for my alien world that is a large apex predator known commonly as a wraith. It lives mostly in dense jungle and forest and uses stealth and ambush to catch its prey (it ca...
Could a chemical compound change a human body in a way that a regular quantity of that compound is needed to stay alive after the first dose? The short answer would be yes, there exist already suc...
Venus is being paraterraformed with floating cities. Mechanical machines collect material from the surface and send it floating at an altitude of about 50 Km where conditions are more Earth-like. H...
Assuming that we have a universe with four spatial dimensions plus time, within which atoms exist that can form solids, liquids, gases and plasmas, the compounds that can be formed having physical ...
A spaceship of several kilometers length is accelerating to a very high fraction of $c$ (basically as close as they can possibly get). Which problems can the machinery and the crew encounter? And...
Recent news reported the discovery of three "earth-like" planets in the TRAPPIST-1 system. This is interesting because the star is a small, cool red dwarf about the size of Jupiter. The three pla...
In Tarzan the Terrible Edgar Rice Burroughs introduces the Gryf which is a Triceratops that survived extinction and has since evolved to become carnivorous. It may be possible that ERB believed th...
A myrmecoleon is a creature with the upper torso of a lion and the rest of the body is like an ant. While it's not probable for a true insect-mammal hybrid to happen naturally, are there any evolu...
A Dyson Sphere, being a sphere, is a uniform "equatorial" climate across the entire surface. I consider this to be a major problem. Somewhere between the Dyson Sphere and the Dyson Hyperboloid is ...
I know that on a binary planet you would have planetary eclipses (basically like a solar or lunar eclipse but with planets instead of moons). If there also is a moon, things would be much more comp...
So, I have an aquatic humanoid species that I want to be able to use echolocation. They are extremely similar to humans,with some minor differences, like gills. (The reason I include this tidbit is...
I know that by definition, a desert implies a lack of water and, as such, makes it very hard for living things to survive there. In the story I'm writing, the characters come across a planet that ...
I was thinking of a situation in which an Extra Terrestrial plant life form evolves a nervous system and eventually a brain. This plant diversifies into a variety of different life forms with some...
Note: There is a related question about illuminating such a sphere that inspired this question. I'm going much farther, though, this is not a dupe. The Dyson sphere will be the central mass of t...
I have an exomoon that orbits close enough to its planet that it has notable geological activity. I would like to limit active volcanoes/geysers/lava lakes/etc. to at most, a couple dozen areas on ...
The following post is copy-pasted from a similar question on Reddit: Apparently, I already started work on the story and it turns out, that I have Ganymede speaking a fictional Russian dialect ca...
If there were some way (sub question: IS there some way?) to get neutron star material out of the gravity well of a neutron star, -say maybe a high-speed collision of two such stars- how would that...
Reading this question about 1 mm tall people made me wonder: would a 1 mm tall person even be able to breathe? To someone of this size, the oxygen molecules around them would be much larger in prop...
