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This is a terrible planet for animals to live on, with all the humans around. Someone should just put all of them down. There is a group of radical vegans/animal rights activists that want to kill...
Our planet has a surface full of silicates and a core made of iron. It's due to this that Earth is the way it mostly is - most rocks and many minerals contain some form of silica. But what about a ...
Think about a big space station or whatever giant space building. What will be its mass to attract (with gravity): Small asteroids (1-10 kg / 2-20 lbs) Spaceman (100 kg / 220 lbs) Satellites (...
Earth has an iron-nickel core which gives us a magnetosphere. Based on this question that replaces our iron core with a mercury core, would we be likely get a magnetosphere? Mercury is highly cond...
Right now I'm writing a sci-fi story that develops in a double planet (think of Rocheworld.) The double planet (along with a couple more planets) orbit a big star and the whole system is orbited by...
Let's suppose we live in different star system with two similar-sized planets (with a mass of three and a half Earths.) We live in Planet A, which is habitable. For some reason, Planet 2, our neigh...
Basically I want to create a world in which some of the humans have developed a higher body temperature in order to survive cold, harsh climates, such as the poles or even tall mountains. The reaso...
Back home, Venus is a twin planet with serious issues. The average surface temperature is 900 degrees Fahrenheit, atmospheric pressure is 92 times greater than ours and carbon dioxide makes up 96%...
In almost every sci fi alien trope there will be a directive whereby one of the general order states no spacecraft may interfere with the normal development of any alien life or society and is puni...
Alice is living on a sphere that has zero gravity and that is in an inertial reference frame. However, she and the sphere have electrical charges that are such that if she jumps she will accelerate...
What exactly happens to leather armor in different environmental conditions, for example battles or long exposure to rain or desert heat? What can be done to negate or care for it?
I've wanted to work out a world where summers are extremely hot except for two weeks in the middle of summer. Winters would be extremely cold except in the dead of winter when there would be two we...
Earth in this scenario still rotates once every 24 hours, and the temperate zone still has four seasons, each one lasting three months. But in this scenario, a temperate summer has the sun shining...
There is a place that has a natural boundary that allows all animals and plants to enter that place but any animal that can't fly is unable to leave that place. This place is large enough to have ...
The Hollow Earth theory is/was a pseudoscientific idea that our world is actually on the inside of a large sphere. The "sky" points inward towards the center, where the "Sun" (a light source) is, w...
Someone has created an AI of human-level intelligence, and within hours this AI has grown in intelligence and power to the point that human life no longer seems so sacred. In an instant, all life o...
Follow up to this question: How would earth goverments respond to killing of most of a colony to keep the rest alive long enough for rescue but with a different approach. The same scenario occurs....
Our modern systems are predicated on the existence of electricity, which is a phenomenal discovery that helped propel the human race into our current civilization. However, electricity can be highl...
In one world I've developed, the local surface gravity is slightly more than three times the surface gravity on Earth. Humans settled this world and were doing quite well through highly advanced te...
Can the oceans freeze (at least several feet below sea level)? I know that the temperature for salt water to freeze is lower/colder than fresh water, and when it does freeze, the ice is mostly salt...
Let's say that a gas giant (around the same size and distance from the sun as Jupiter) has a moon that supports life. The moon is around the size of Mercury (if this is too large please let me know...
What's the biggest building we could build on the world? 90% of it must be air pockets that we can fit humans into Going underground is allowed, but you can't allow your building to turn to liqui...
A world I am working on has reached a sort of material production singularity. Recent innovations in space mining, artificial intelligence, teleportation, and 3D-printing have allowed for devices k...
In this question, I asked about a matter-filled 4-spatial-dimensional universe, with a gross structure defined by my own answer to that question. Then, in this question, I asked about what the per...
I know that someone has asked how chemistry would be in four dimensions but I was wondering what would chemistry be like in two dimensions? From what I understand, in two dimensions, particles, ins...
