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Questions tagged [science-fiction]

For questions relating to worlds with a setting of common science-fiction.

12
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11answers
6k views

How can Ganymede have an Earth-like gravity without us having realized it?

Imagine a small primitive humanoid civilization that developed independently in caves under the surface of Ganymede. We can assume there's enough light that filters through the crystalline surface to ...
5
votes
3answers
252 views

The time it takes to advance a medieval period country to a spacefaring intergalactic country

The main character died, and they are transported into another world. Before they are sent by the deity to the other world, he is given overpowered skills. The main character is also given a game-like ...
1
vote
1answer
125 views

Might it be possible to work while sleeping without significant long term health complications?

One aspect of the world I'm conceptualizing is that some employees might opt to work while in a medically induced coma, or work at night while they sleep by using brain implants that induce a type of ...
1
vote
3answers
243 views

How to keep track of everything with an infinite-dimensional telepathic ability? [closed]

The ability to telepathically communicate with and control any of your infinite other-dimensional selves is rare, but exists! Rules for how this works: Although dimensions and possibilities are ...
1
vote
1answer
93 views

How can changing environments make my super-villain super-powered while causing chronic (extreme) pain? [closed]

I have a super-villain who is from another environment( e.g. aquatic, extra-terrestrial, extra-dimensional ( Bonus points for the least extreme from populous land-locked earth )) They are not a ...
9
votes
4answers
238 views

How would a life form conform their anatomy to fit whatever they wear?

In the sci-fi setting that I've had on the backburner for a while now, there is a species known as the Azmarans. They are a very socially adept species, between them having a rather communicative ...
0
votes
1answer
86 views

Capture a city of wild spirits by humans without an arms battle? They can be attracted to a vessel they will attach/feel drawn to and stop resisting [closed]

I need to attack a city under the control of evil spirits to take back control. Since the enemy are spirits, physical or arms warfare will not help. Since spirits are shown to exist, magic is ...
4
votes
3answers
342 views

What’s the ideal size for a human factory?

Context: The world has been in a world war lasting centuries. Casualty rates are through the roof and can’t be lowered. The warring countries' solution was to make human factories by incubating ...
3
votes
1answer
91 views

Terraformed planet orbiting a blue star

A planet was terraformed in humanity's distant past by technologically superior beings. The planet is very similar to Earth. I understand blue stars are highly radioactive and thus don't have real ...
20
votes
16answers
6k views

Is it dangerous for a ship's crew to get stranded in a nebula?

Some Context I'm creating a universe where humanity has reached the stars. They've colonized a few star systems and, obviously, FTL drives are a common thing. The part of the story I'm currently ...
6
votes
4answers
271 views

How do I retain national independence while also having a one world government?

So I am in a sci-fi world where I am trying to figure out a system of super-national and multi-national organizations that would retain the independence of nations while also defining how colonization,...
1
vote
5answers
223 views

Sending a large object at a small portal

Imagine a portal. This portal is two-dimensional and circular, with a diameter of one meter. It is completely above the ground. It leads from Planet A to a planet across the galaxy (Planet B) . An ...
-1
votes
3answers
158 views

Pirates, IN THE SKY? [duplicate]

Alright so the basics here are pretty simple. I want to have pirates, but in the sky, pretty much what you expected from the title there. BUT, and it is a big one, there is this little problem I keep ...
29
votes
30answers
7k views

If antimatter were common starship fuel, what could prevent it from being commonly weaponized? [duplicate]

My scenario involves a high sci-fi setting, where starships are readily available to civilians with sufficient qualifications and money. Most civilians would not be fueling ships with antimatter ...
4
votes
6answers
244 views

Self-sustaining Mars colonization

Background A 100 years in the future Mars has been colonized, new settlers and resources arrive from earth every 26 months (when the planetary orbit lines up best) by first taking the space elevator ...
3
votes
5answers
286 views

Disease that targets only teenagers

Would it be possible to have a disease that only affected people in a certain age group, more specifically, teenagers? And what would the virus be targeting?
9
votes
3answers
3k views

How can I locate myself in a random point of space?

Some Context I'm creating a universe where humanity has reached the stars. They've colonized a few star systems and, obviously, FTL drives are a common thing. They basically jump you to another ...
4
votes
6answers
214 views

Non-nautical term for space marines [closed]

Many science fiction stories describe soldiers who perform spaceship boarding/defense or planetary invasions as "space marines." This is by analogy to modern marines who historically specialize in ...
2
votes
4answers
165 views

Biological bonding mechanism

I've been toying with the idea of a society with alternative forms of families or social structures. In one individuals of coming of age (socially imposed) or due to a biological necessity (...
0
votes
3answers
65 views

How to interface with beings in the galactic core?

Context: So assume there are an unknown number of near-omnipotent/omniscient beings who have been confirmed to live inside of an area of space called the Active Galactic Nucleus (AGN). To provide a ...
2
votes
4answers
271 views

Localized manipulation of the speed of light

I've recently read Alastair Reynolds' sci-fi best seller, Redemption Ark, where he explored the concept of manipulating an inertial frame overlaid on the quantum vacuum like many of the other ...
2
votes
3answers
55 views

Resonant Frequncy Interference Pattern

Imagine an area in which there are multiple high-power sound wave emitters (speakers, transducers, etc.) that are placed and tuned to destructively and constructively interfere with each other such ...
2
votes
0answers
105 views

How Would a Base Pi or Base Phi Number System Impact a Culture? [closed]

We use base 10 because that is the number of fingers we possess. However it's not hard at all to imagine a culture encountering infinite numbers like pi or phi, deciding those were special, and ...
16
votes
7answers
4k views

Why is Cryo-sleep considered harder sci-fi than FTL? [closed]

I’ve noticed that in some topics people mention something in the line of: “Oh, my universe is purely hard sci-fi, there’s no FTL, people use cryo-sleep to travel long distances between the stars”. ...
4
votes
15answers
2k views

Why would time travel affect the body in any major way, especially damaging? [closed]

Obviously, I'm talking about sci-fi time-travel and not just being as time moves by, slowly but surely. Is there a reason one would actually bleed from any orifice? For any pain to occur? Dizziness? ...
10
votes
1answer
158 views

Can Lenz's Law Allow a Simple Block of Metal to Divert a Charged Electron Beam?

I was curious about an odd effect I first saw in video here: YouTube : Copper's Surprising Reaction to Strong Magnets In the video, a big heavy magnet is brought to an abrupt halt by a simple piece ...
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votes
1answer
57 views

Planet Size Disaster [closed]

What kind of disaster could be large enough to wipe out an entire planets life and leave it like a complete wasteland, similar environment to what Mars is? Nuclear warfare or meteors are what I have ...
2
votes
2answers
119 views

What kind of climate would a planet with a 49-day orbit have?

I'm using Kapteyn-b for a story, which orbits its red dwarf star every 49 days. It's almost 5 times larger than Earth, though I've made a couple changes to the observed data to make it more plausible. ...
7
votes
14answers
4k views

What technology must exist for a space station to rely on magma to generate energy?

This is a fairly simple question with a likely rather complicated answer. Basically, I worldbuilding a planet that has become a complete wasteland of ash, rock and flowing rivers of magma. The ...
6
votes
10answers
3k views

How to build a fail-safe system for an engine that can harness energy from a Black Hole?

Some Context I'm conceiving a universe set in the far future. Humans have already mastered FTL drives and populated several planets in various star systems. They have engines based on singularities (...
19
votes
10answers
5k views

Planetary defense in an interstellar society

Let's say that you are some sort of tyrannical dictator of an inhabited world with futuristic technology (ex. railguns, a fully automated labor force, efficient space travel.) You know that within ...
2
votes
2answers
65 views

Atmospheric Conditions leading to different colorations

What kind of atmosphere would a planet need to alter the color of the sun and moon? I know this is rather broad, but I know that a certain gas in our atmosphere colors the sky blue, and gives the sun ...
4
votes
4answers
242 views

What would the biochemistry of a vacuum dwelling creature look like?

I'm playing around with a story idea that includes vacuum dwelling intelligent life, but I'm not sure I understand the constraints of biochemistry I need to deal with. There's lots of potential ...
4
votes
1answer
119 views

Pandora- superorganism eywa

I've recently became curious about the moon wide super organism on Pandora known to the natives as Eywa. Eywa is theorized by human scientists to be a superorganism of all living things on Pandora. ...
3
votes
6answers
194 views

I am writing some short stories and can't wrap my head around a time travel paradox

I put an object in a time-travel device (say something that looks like a microwave ). I am now going to transport the object in time, but leave it in the same position relative to the Earth. If it was ...
6
votes
10answers
1k views

Plausible way to curse humanity to a pre-industrial society?

It's common in sci-fi for large medieval-esque populations of humans living in the ruins of a former technologically advanced civilisation. My story is one of these, with a large population of humans ...
2
votes
1answer
100 views

Ensuring Continuity of Consciousness When Transferring The Mind Into A Computer? [closed]

I had an idea for a world where brain uploading is a thing, but I have a problem. Besides slowly replacing the brain itself with nanobots and the like, what's the best way to make absolutely sure ...
2
votes
3answers
193 views

Best Rocket Engine for a 12 Light Year Journey?

I'm writing a Colonization story, and I'm trying to determine which propulsion system would be the best option. The destination is Kapteyn b, 12.76Ly from Earth, and our 40K colonists will be in ...
8
votes
4answers
582 views

Spaceship Emission Security

In my military scifi novel the military is, obviously, very concerned with security aboard its spaceships. They don't want other people to be able to receive any information about what happens on ...
0
votes
2answers
154 views

Peeping at Antipodes: How long would it take to peek around the sun using modern technology?

Assuming humanity was suddenly highly motivated to do it, how long would it take a probe launched from Earth to get into a position to record and broadcast images of the position in the opposite orbit ...
5
votes
4answers
127 views

Applications of Electromagnetism in “Force Fields”

Lengthy Explanation of Why I'm Here: TLDR; "force field" made of electromagnetic radiation. Recently, I've decided to compile a list of possible technologies available in the 22nd and 23rd centuries,...
18
votes
9answers
5k views

Why build underwater outposts, rather than ocean-surface settlements?

Suppose we've colonized a planet with 99% of the surface area covered by oceans. It has submerged continental crusts, averaging 200-500m underwater, with the average depth of open ocean being 1000-...
1
vote
2answers
121 views

Where should I place a fictional 9/11 to have it be worthy of news across the whole universe (100 billion light years)? [closed]

(notice:some morbid language ahead) I have thought about putting it on a planet, but planet would be too lame and of little importance to the whole universe. And such 9/11 would only have a few ...
3
votes
4answers
633 views

What purposes could a technological ruin with a half-mile sphere full of water have served? [closed]

There is a soft sci-fi RPG called Numenera, set on the Earth a billion years in the future, where multiple technologically-advanced civilizations have risen and fallen, and a new human civilization is ...
7
votes
4answers
423 views

How many years should survivors wait before exiting a nuclear bomb shelter?

I'm writing a tale about a post apocalyptic world. I'm studying the timeline about the world history, I've planned that, using "clean" thermonuclear bombs, radioactivity should be quite lower after ...
14
votes
22answers
5k views

Plausible hypothesis on why gravity might fail on earth

I've been grappling with a story for a while, involving a scenario where gravity starts to fail. The goal of the story is mostly how people react to the knowledge that the world will end. But, I also ...
0
votes
3answers
177 views

What makes humans so special amongst the thousands of civilizations? [closed]

Alas, the galaxy has been colonized for many millenia. Hundreds, if not thousands, of advanced civilizations have emerged. Empires have risen, fallen, and the scourge of intelligent life forms ...
3
votes
5answers
148 views

Detecting Superpowered Individuals

In my story, a very small percentage of individuals develop superpowers (about 1 in every 10 million, if not less. There are about 200 billion people in this world). Everyone else in the world is ...
-3
votes
1answer
143 views

Carrying out Self replication of humanoid to create versions of itself

Premise: I have a character that is trying to replicate himself into offsprings that will accomplish his task. He is a major character with immense levels of power/energy. My character has to create ...
-1
votes
1answer
102 views

Planet of the Rodents: Who wins?

So, this is essentially a Rats of NIMH AU (Alternate Universe); as in canon, a group of rats are captured by scientists working for a laboratory located at the National Institute of Mental Health (...