# All Questions

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### Units of measurement, especially length, when body parts vary in size among races

Historically, units of measurement are often based on sizes of body parts. Probably the most obvious example would be a "foot" literally being based on the length of someone's (or everyone's, or ...
102 views

### Spaceplane simulating winged flight in the vacuum of space?

If a spaceplane were to try to simulate the look of aerial flight in the vacuum, would it be difficult or easy for the pilot to manually simulate aerial maneuvers, using just a contemporary reaction ...
101 views

### How to calculate time to reach fractions of the speed of light when accelerating at 1g

Currently writing a scifi novel and am trying to do the math to establish time frame of the lore. The main points are that in 2068 CE Earth sent a generation ship to colonize Proxima Centauri. They ...
6k views

### How to prevent criminal gangs from making/buying guns?

TLDR: What can modern governments do to force criminal gangs to use melee weapons instead of guns. So I am writing a novel where the main character is pushed out of society, and is forced to join a ...
98 views

### What element could be used on a fictional metal-poor planet for biological oxygen exchange?

I'm working on a hard sf novel about humans being forced to survive on a metal-poor planet. They have to take dietary metal supplements at first but eventually a bio-engineer rigs the biochemical ...
446 views

### Human with super efficient metabolism

So I read recently this article https://dothemath.ucsd.edu/2011/11/mpg-of-a-human/ as I was trying to design a sci fi alien race for my story and I found out that a human only has an efficiency of ...
305 views

### How could one become rich when suddenly be transferred back in time by 100 years? [on hold]

I assume he is unprepared for such an event and therefore does not have specific detailed knowlede of the stockmarket, ground prices or similar assets. Also without initial capital buying some ...
7k views

### How would armour (and combat) change if the fighter didn't need to actually wear it?

Through an arcane ritual, a warlock-knight forms a bond with their squire: thereafter, the squire wears the armour, and the warlock gets the benefit of it. So any force (be that hand, weapon or ...
93 views

### Reality check - cognitive cyborg with an advanced brain-computer interface

I am going to finally create a human cyborg with super-intelligence to beat one other AI. It's mid 2050s and my company Neuroconnect has produced a nanotechnology BCI (brain computer interface) ...
142 views

### Why would a venomous snake squeeze its threat non-lethally?

This is a key part of my snakebite mystery story, which I am thinking of making part of a medical mystery series. I have been told that it actually is more life threatening to the snake for it to ...
82 views

### How different would the internal composition of a carbon planet be from that of Earth?

My idea is a carbon planet 50 % larger than Earth and with 5 times its mass (approximately), but I set these values ​​after investigating those of several discovered exoplanets and none of them is ...
99 views

### What's the scope of an Element Transmuter?

Scenario: When one thinks of elemental transmuters from mythology or comic books, one thinks of single touch by the transmuter to a large, multi-elemental structure (like a human body) that causes ...
192 views

### How could a medevial kingdom of mainly exclaves function (Politically)?

In my setting their exists the Kingdom of Tor a kingdom nestled nearby a small mountain range. The capital city, Tor, is built along a tributary of the river Goro one of the largest rivers in the ...
142 views

### Social implications of complete separation of copulation and reproduction [on hold]

The Twelve Kingdoms is a fantasy novel series written by Japanese author Fuyumi Ono, and has been made into an anime series. In this series, humans, and indeed all other motile beings, are born of ...
81 views

### How would the world be able to contain and/or destroy the Hulk? (MCU) [on hold]

In this scenario, the Hulk (MCU, not comic 616 Hulk) has been driven insane by unknown means and will rampage and kill until nothing is left. Banner's mind is gone leaving only an angry rampaging ...
57 views

### If Venus or Mars Were Part of an Earth Binary [on hold]

This is the original photo, just for a little reference to the question in mind. Of course, the brightest light in this photo is still the moon, a body of bare rock 2,158.8 miles wide and weighing in ...
5k views

### Dogfights in outer space

Assuming spacecraft are using contemporary propulsion technology, and are engaging in a dogfight in outer space (whether they are manned, drone, or autonomous), would the movements of the craft be ...
402 views

### What sort of psychological changes could be made to a genetically engineered human

I'm in the rough outlining stages of this story, and found myself a bit stuck trying to turn this particular corner. Firstly, here are the basics of this world: In the future, it's a common ...
136 views

### How might a society that was once subjugated by superhumans react to their return? [closed]

The premise is quite simple. Sixty years ago, superhumans were wiped out. The source from which they drew their powers was destroyed and the world moved on. Democracy, the rule of law, human rights ...
156 views

### Constructing airtight, human suitable facilities in (near) vacuum (Moon, Mars etc)

So, we've reached The Moon/Mars. Our band of intrepid Colonists/Lunatics will almost certainly start by working out of prefabricated facilities (ship, habitat etc) but they will eventually run out of ...
2k views

### Can lodestones be used to magnetize crude iron weapons?

Imagine a setting where humans have to compete with another sentient race, which can only be harmed by magnetized weapons. Humans have only basic technology, and magic is very very rare. Would it be ...
74 views

### What are some issues I can expect in creating a self-sufficient, post-apocalyptic underground society? [closed]

(Please bear in mind I am quite new here, and I have in fact created this account just now. I've tried my best to follow all the rules I've read browsing around. I do realize this is quite a broad ...
462 views

### Realistic rollerblade steam propulsion device, like something that might have been invented with 18th century technology. Is it possible?

This was an idea generated by my sister that I thought was very interesting. I intended to make it work by strapping rollerblades on a person's legs and utilize a compressed gas/steam-powered pumping ...
3k views

### Is it possible to grow new organs through exposure to radioactivity?

I was thinking of something like growing extra eyes, heads, or limbs, but in the exposed individual not through his descendant that get the mutation. What I have found is that in individuals exposed ...
164 views

### Alien Mammal-Like Ears

So I’m trying to design my alien life around the pressures they might face just like earth’s wildlife, and most things I’ve made plausible life that is similar to ear but not giant dinosaur cats. The ...
48 views

### What atmospheric changes could make water purple? [duplicate]

I'm writing a story based on another planet and would like for the water to be purple instead of blue, but I don't know if an atmosphere that would allow that would be safe for humans to breathe in.
113 views

### Anatomically Correct Modular Body Plan Animals

The fixedness of body plans varies widely across different types of Earthling organisms. At one extreme, you have things like tardigrades, for which every individual of any given species has exactly ...
138 views

### What would the port of an airship be called? [closed]

Marine ships and boats have ports. Airplanes have airports. In scifi spaceships can have space ports. What would be the airship equivalent in a steampunk world where marine ships are still heavily ...
2k views

### How big would my character's wings realistically be?

I'm not a professional at world building or character building, still starting out, but I do want to make an attempt at having my fantasy character be somewhat realistic. He's 11 years old, 4.8 ft (...
201 views

Despite the wide variety of movement strategies employed by Earthling animals, up to an including curling their bodies into circles and rolling, there is one mode of locomotion that is glaringly ...
237 views

### What would happen if the Earth passed through an interstellar dust cloud?

I understand an interstellar dust cloud as "an accumulation of gas, plasma, and dust in our and other galaxies. Put differently, an interstellar cloud is a denser-than-average region of the ...
284 views

### How can I create an infinite space bound by another infinite space (or contained within it)?

First let me preface by saying this question will be very math heavy, and might be as equally suited to math stack exchange as world building. For that I apologize, but since the reason for my ...
10k views

### How can God warn people of the upcoming rapture without disrupting society?

A being known as Dea is the creator of all things in the mortal world. He created human beings as living batteries in order to fuel him and give him power. This god is in competition with other gods ...
296 views

### How can you discreetly advertise underground death matches?

I, Rex Machismo, have determined that modern society has robbed this generation of its male identity. Gone are the days of conquerors, where we met each other on the field of battle with sword and ...
9k views

### How would timezones work on a planet 100 times the size of our Earth

I thought the answer would be simple and maybe it is, but it's just rattling my brain. If there was a planet 100 times the circumference of Earth, assuming everything is similar to Earth, 1 day (1 ...
213 views

### Could sound be recorded by door panels and later replayed?

In my novel, a character makes the claim that sound can be recorded by the panels in a door. The door panel vibrates with sound, according to him, and those vibrations are recorded analogically, very ...
5k views

### A continuous water “planet” ring around a star

It is impossible to have a continuous mostly liquid water ring around a star? Probably such a configuration would be unstable under normal planetary forming condition. I am looking for a good ...
153 views

### Anatomically Correct Hunter from Needle

Hal Clement's novel Needle was revolutionary in featuring a non-parasitic alien lifeform capable of inhabiting a human body. Specifically, the Hunter in its independent form is a gelatinous mass ...
2k views

### Why would humanity have left Earth 2 so quickly? [closed]

In the world I am building (based heavily on the Star Wars universe setting, but more historical), humanity first abandoned Earth to travel to another planet within their solar system, which they ...
1k views

### Medieval Warfare and Combat Implications of Superior Strength and Skin as Strong as Leather Armor

I've got a variation of 'humans' who have superior strength on average, with the top fourth of their population being comparable to 'The Mountain' from "A Song of Ice and Fire" (Roughly 8' tall and ...
6k views

### How many people would you need to pull a whale over cobblestone streets?

A whale, lets say a humpback (~40 tons) has to be pulled about 250 m from the port to the town square. The road is classic cobblestone. People put hooks into the whale meat with ropes attached and ...
107 views

### What would be the consequences of a planet having a core predominantly made of Krypton?

So I'm currently working on a fan project to redesign Superman's home planet of Krypton. This new Krypton is 1.6x the size of Earth and orbits the red dwarf star known to us as LHS-2520, 27.1 ...
115 views

### How would flight factor into shepherding for Aarakocra (birdfolk, basically)?

So, my setting, as of now, is a singular supercontinent, with a large mountain system running across one of its sides, basically the fantasy equivalent of the Andes. On paper this (or at least its ...
4k views

### Why is transplanting a specific intact brain impossible if it is generally possible?

In the near future Science Fiction novel I am writing, the personality and memory of a person are transferred to an artificial brain after a fatal accident, creating an artificial intelligence with ...
150 views

### Which Stars Would Best Suit For the Habitable Zone of The Nine Norse Earths?

In an alternate universe, the nine realms of Norse mythology--Midgard, Asgard, Vanaheimr, Jotunheimr, Alfheimr, Hel, Nidavellir, Niflheim and Museplheim--are actual, real-life "Earths", in the sense ...
119 views

### How much agricultural land per person in medieval society? [closed]

In medieval society corresponding to approximately year 1200 in Holy Roman Empire, how much agricultural land would there be on average per person? What would be typical composition of the land? (...
150 views

### A practical post apocalypse bullet farm for the survivor on a budget [closed]

In a post apocalyptic society (let's say northern Arizona or southern Colorado) or just outside of a city what would be Needed to practically 'farm' (produce) modern bullets? The idea is to be able to ...
166 views

### How can an immortal surrogate pass on genes to a fertilized embryo?

I am part of a group of immortals from the planet Ziest. From the dawn of time we came…moving silently down through the centuries. Living many secret lives, struggling to reach the time of the ...