# All Questions

20,614 questions
107 views

### I am designing a quantum levitation gauss rifle for a novel that is powered by its own neutronium slugs. I need help with specifics [on hold]

My idea us that through what can be defined as reverse tron lasers we have infinite neutronium and through an equilibrium of quantum levitation, a single massively dense object can offset its ...
3k views

### How many people need to be born every 8 years to sustain population?

So I'm doing some worldbuilding for a small, isolated village on the coast. The winters are harsh, but making sure everybody has enough food generally isn't an issue because they have good trade with ...
185 views

### What would happen if the boiling point of a section of ocean was lowered to 5C?

Suppose, that in a particular area of the ocean on an earth-like planet, all water molecules are transmuted into an exotic variety of $H_2O$ that is identical to normal water in every way except with ...
70 views

### Could the shape or geography of the continents be dramatically changed in a roughly short span of time? [duplicate]

I’m aware that the continents and the tectonic plates they reside on drift, but for there to be any noticeable change in their shape or geography takes millions of years to occur. Is there a known way ...
208 views

### How can ruler support the invention of useful things?

Good rulers support invention of useful things. But this question has two sides. Support of invention Prevention of fake inventing Basis: Many inventions arise as side-effects of searching for ...
54 views

### on sentient reptiles/ectotherm behaviors [on hold]

so, I was searching and reading things about reptiles trying to build a guideline for any kind of cold blooded peoples/aliens I still have a hard time finding precises idea on how temperature ...
263 views

### How could a silver sword give off a golden glow in the light?

Now, I am not talking about a golden glow that overtakes the sword itself. I'm not looking for a Lightsaber. I'm talking about a sword that is silver in color giving off a golden reflection (or ...
116 views

### Steam-Assisted Victorian Engineers - Why the secrecy? [on hold]

Background Isambard Kingdom Brunel FRS 9 April 1806 – 15 September 1859, was an English mechanical and civil engineer who is considered "one of the most ingenious and prolific figures in ...
236 views

### Is it possible to demonstrate being God without using any power? [on hold]

God is on Earth and is trying to convince someone without using any power. How? A power is anything that no human can do.
883 views

### A society in which the “family system” is similar to those of lions or monkeys

I envisioned a world where people are not bounded by marriage and females are free to choose those who they deem "accomplished" and have offspring with him. The males "occasionally" interact with the ...
227 views

### There are diamonds 10 times tougher than ceramics, approaching some aluminum alloys toughness, are these diamonds useful as an armor? [duplicate]

According to this paper if diamonds are doped with some boron and nitrogen it will gain enormous toughness while retaining the superhardness characteristic of diamonds. This diamonds reach toughness ...
204 views

### Reality Check: Plausibility of a new kind of sentient alien race: Split prehensile tail, quadrupedal, very floofy!

In building an sentient alien that is unique among the sea of humanoids, I aspire to explore quadrupeds. For a quick visual reference, this is what I have: proportions are definitely off, but in ...
141 views

### Meterology of double planets sharing an atmosphere

If two planets were tidally locked and shared an atmosphere, as described in this question, what would the weather patterns of the planets be like? What weather patterns would form, and could these ...
217 views

### What would happen to a human dragged quickly from the surface to the mesopelagic zone?

My mermaids have returned, and now they're dragging semi-conscious people about 700-ish meters underwater. Is it realistic for the person to still be alive at this point? (Y'know, for about ten ...
201 views

### MacGyvering medieval poison

Does anyone know of any compound/substance one could have access to in a stone prison cell (From food? The rocks? The metal bars?) that could be processed through rudimentary means into a quick acting ...
291 views
+50

### Forememory: What could prevent reiteration from working?

I use forememory instead of foresight, due to how the ability works. A cunning and creative person can remember five minutes into the future, and are smart enough to exploit it in any way possible. ...
62 views

### Electric Universe: planetary system inside a Red Star [on hold]

Based on the Electric Universe physics a Red Star could harbor a planetary system within. How would life evolve taking in account that light would be almost constant in all the planets contained by ...
5k views

### Would a primitive species be able to learn English from reading books alone?

A species that hasn’t developed any form of written or spoken language learns to speak English, or any modern language for that matter, and it becomes prevalent in their future society. To summarize, ...
260 views

### What kind of animals can be raised like cows?

Looking for animals specifically used for meat. They must be able to be kept in way that that cows can be, That could mean in a pen with corn or in a pasture with just a tall fence. Edit: I know ...
80 views

### Fictional Law - The Pet Balance Rule [on hold]

A fictional law could exist under the umbrella concern of animal welfare that delt with keeping a reasonable even if still human centric balance between humans and pets (familiars, animal helpers, etc…...
9k views

### How to get directions in deep space?

A spaceship crew, during their interstellar travel loses control of the spaceship for a few hours due to external factors (exact factor not important). This causes the spaceship to deviate from its ...
39 views

### Whats the optimal size for my comet/asteroid [closed]

im looking for the optimal size of an comet/asteroid that if it impacted earth would cause massive damage globally (like nuclear winter) but not so bad so that plantlife could start to return within ...
8k views

### How to preserve electronics (computers, tablets and phones) for hundreds of years

Let's say you wanted to preserve some electronics for 500 years or more in a museum. What could you do to preserve them in working order for hundreds of years? Deep freeze? Lead lined vaults? Vacuum? ...
228 views

### Bayonets in a world without the city of Bayonne [closed]

Supposedly, the bladed or spiked weapon which fits on the end of a firearm derives its name from the French city of Bayonne. In a world (described in modern English) with no link or knowledge of the ...
390 views

### Could a welfare state co-exist with mega corporations?

The Hegemony is a welfare state dedicated in giving all citizens: housing, education, basic necessities (water, food, etc), and help with either finding employment or a job assigned by the Hegemony. ...
59 views

### What is the minimum tech level for manned flight? [on hold]

For instance, a hot air balloon is really pretty simple; I suspect that even thousands of years ago, it would have been possible to make - steam engines existed in 1AD, after all. So, just how far ...
4k views

### How would a solely written language work mechanically

I am trying to make a language for a fictional world and I am wondering how a species without vocal chords could communicate via written language
125 views

### How would this system of government and caste work? Would it work at all?

My main question is would this government work? Would a society shaped like this function as intended? In this story, there is a civilization of Dragon-like people called "Draconian." I have little ...
209 views

### What is the earliest time a pulsejet could be built?

Let's assume that some wealthy characters somehow find the plans for a valveless pulsejet. How is not important. Maybe there was a time travel incident, or some Atlantean book was unearthed, or ...
11k views
+50

### How to make money from a browser who sees 5 seconds into the future of any web page?

You installed a strange browser you found in the deep web that works similar to any other. You soon discover something really amazing. That browser shows the state of any web page or online app 5 ...
94 views

### How would react a medieval magic world to the arrival of an Interstellar colony? [closed]

Edit (I rephrase the question a bit to try to not made it opinion based) A space colony comes to a planet who is pretty similar to how fantasy's worlds tend to be represented. The space colony is 44%...
89 views

### What would the moon look like if its orbit was highly inclined?

How would the phases of the moon change depending on the inclination of its orbit with respect to its primary's equatorial plane? Earth's moon has an orbit that is rather close to the ecliptic, but ...
128 views

### How long would it take for a centaur's broken leg to heal?

My fantasy world is medievalesque in technology. While healing magic exists, most centaurs do not have realistic access to it. Centaurs are your archetypal human torso, horse body. How long would it ...
76 views

### How to compromise block chain force shield? [closed]

Set in the distant future, a notorious terrorist group infamously known as "51 Crew" is planning an ambush near the orbit of Thebe, Jovian moon. In the next few hours an armoured shuttle holding a ...
181 views

### Could a medieval trebuchet and parachute work to deliver a soldier past a 20-30 foot wall?

This is a ludicrous question and isn't meant to be serious. I had an idea of catapulting people with parachutes and thought it would be funny. This was inspired by Elemtilas answering a previous ...
3k views

### Hot air balloons as primitive bombers

Imagine a medieval-style city, besieged by enemy army. It might be big and have wide river preventing besiegers from direct attack on the walls and launching projectiles significantly far into the ...
163 views
+50

### self-charging pcp airgun

In my story idea the main character is given a pcp airgun with a sort of self-charging mechanism in order to commit certain covert operations by assasinating certain individuals. (don't ask he was ...
137 views

### The Elementary Evil vs You /Wights/ How to defeat Henry's guerilla zombies? [closed]

Several hundred years after Simon, the Sudoer, Anon and two gold dragons managed to seal him away, Heinrich, the First, formerly Henry, is back, this time with an M249, ready to give world domination ...
249 views

### How to detect gyroswords

So, in the land of futuristic feudalism, the board of sword duels has a dilemma. During a duel, one of the duelists added put gyroscopes in his sword. He claimed this was to improve his balance, which ...
263 views

### Would storms on an ocean world harm the marine life?

On a habitable world completely covered in water, with no land above sea-level, there would presumably be storms of biblical proportions. Suppose this world has oceans so deep that the deeper layers ...
5k views

### How can a new country break out from a developed country without war?

I'm in need of the backstory on how a country was able to form and break out from a rich western and well developed country. I basically had to hit a reset switch in order for some of the future plans ...
146 views

### Could a pump jet be made in the 15th-16th century? [closed]

With the knowledge required, could the pump jet be created for use in ships in the given timeline? If not, what other forms of engines can be made in said timeline that can power ships without the use ...
119 views

### What happens to hydrogen after burning [closed]

With fusion on the rise we are going to have a lot of helium but what gases are limited in helium burning? Context: my science teacher did not know the answer and I got curious
5k views

### Would mining huge amounts of resources on the Moon change its orbit?

Imagine that humanity builds mining facilities on the moon. We know that the moon has Helium-3 which could be used as fuel for fusion reactors. Also, there are a lot of other resources which could be ...
3k views

### What kind of footwear is suitable for walking in micro gravity environment?

Set in the near future, the interior of the spaceship is coated with thin layers of Teflon approximately 10mm average thickness on top of titanium alloy which in case you are wondering it is weakly ...
64 views

### Rotating a map projection - software question [duplicate]

Not a duplicate of What software is available for map creation? as the focus is on how, not what -- requesting useful projections for a polar context, and techniques to transform between projections ...
3k views

### Inhabiting Mars versus going straight for a Dyson swarm

My question is as follows - let's assume our objective function is to have as many humans as possible living outside the confines of the Earth as soon as possible. For this, we need to provide those ...
1k views

### Existence of a celestial body big enough for early civilization to be thought of as a second moon

Is there a possible scenario in which once a year a celestial body can be seen from the surface of the Earth-like planet for a short period of time? With it being big enough for early civilization to ...