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For a story I have, modern civilisation must be destroyed by a worldwide disaster. The objective is roughly something that: Could be man-made or aided (if not now, maybe in the future) Decimates...
While working on some local geography in my world, I came upon these wonderful formations called volcanic plugs and crag and tails, and decided I wished to incorporate them into the land. My insec...
I'm writing a sci-fi story, and there is a giant autonomous computer planet that constantly gathers resources from around the universe using drones. It stores a super weapon at the core of the plan...
In Game of Thrones the Targaryen family had special heritage allowing them to ride their iconic beasts of war. I want to ground this in reality. Is there a way for heritable trait to allow you to b...
Related previous question. How would sleep cycles work on planets with day-night cycles greater than 48 hours or less than 6 hours? This part is primarily for wildlife that evolved there. Native ...
Using the modern technology, is it possible to have a suit which will allow to run at Mach 12 (~4km / s)? For simplicity let's ignore the landscape issues (i.e. "what happens if I run into a buildi...
Let's assume some things: The ground under the object is flat land. The object always remains in the same position. The object is clearly visible from the ground. It is a high priority for the pe...
Suppose that both Earth and Mars was booming with life in a similar way. Except that, on Earth, there was no hominid family, and no humans evolved. Instead, humans evolved on Mars. Assuming we ha...
If there was a life-supporting planet that was cubical rather than spherical, would it be feasible for there to be a unique but similar civilisation on each 'Plane'? I know that cube planets are i...
Merfolk are one of the major species in my book. However, unlike in most depictions, they're fully mammalian and lack gills. Because of this, they need to breathe air, but I still wanted them to be...
The following scenario takes place on Earth, sometime in the next few decades. An unethical biotech company has developed a deadly bioweapon that uses humans as a vector, almost like a suicide bomb...
This planet orbits a larger planet, which then orbits a binary solar system. Is there a way - based on the tilt of a planetary axis or the positioning of the planet in relation to its mother planet...
Need help with a topic for a sci-fi book. Basic premise is 200yr in future, mining facility on small Mars moon of Phobos. Power source we would like is an Sodium Fast Reactor breeder as we think th...
I was considering this answer I wrote: https://worldbuilding.stackexchange.com/a/21374/75 It got me to wondering... if we had a flying sailing ship with a twisted-rubber energy storage device that...
I am working on a story about a person who was raised on an earth-like planet and later moves to our earth. The planet he is from specializes in fruit juice and alcohol making, in specific, wine. W...
I'm providing an interesting twist on the Anatomically Correct series by focusing on a single body part instead of an entire organism. The following image depicts the average range of the cones ...
So, I was watching a funny movie about undead pirates when the realization hit me, I never once tried to create naval superiority for my Mary Sue. Well, guess I just do it now. Titanic 2: (n)Ice t...
From some research, I have learned that atmospheric circulation - winds currents and ocean currents - depend on pressure and the Coriolis effect. But if the oxygen level is increased and the press...
On the Earth, with our atmosphere, even small objects entering the atmosphere such as Tunguska or Chelyabinsk can do devastating damage due to the shock-wave travelling through the air. People coul...
We're in the United States, sometime in the next few years. Through a series of circumstances, a viral outbreak occurs in the country. For the sake of detail, this is how it happens: A scientific...
Let's say metallic hydrogen becomes an economically viable resource that we are able to either make ourselves or mine from a gas giant, how would we use it as a power source for vehicles both plane...
Just for clarification: when I say "designing", I mean just coming up with the idea of this fungus, as opposed to it being "designed" by humans. I've been very interested in fungi ever since findi...
Water, as is, with its physical and chemical properties, is the base of any living being on Earth. Water has a rather high specific heat capacity of 4.184 J/gC, which in itself has a great effect ...
In my world, one of the main methods of transportations is via hot-air balloon. These balloons are propelled by aluminum(or other lightweight metal, it doesn't really matter) steam engines, and the...
Thanks to all who helped me with my first question about how a geocentric system would work! I'm not sure how the moon works in a geocentric model. (This would be a roughly Earth-similar world, t...
