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Questions tagged [science-based]

For questions that require answers based on hard science, not magic or pseudo-science, but do not require scientific citations. Contrast with the hard-science and reality-check tags. Do not use this tag as the only tag on a question.

0
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0answers
32 views

How would humans adapt to be better suited to flight? [duplicate]

My main OC, I was thinking, could have some sort of jet pack/ propulsion device to be able to fly etc. But having recently read some articles about the barriers and the obstacles preventing humans ...
25
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17answers
7k views

Need a specific event that wrecks the surface, allows the race to survive in bunkers, and affords an aftermath suitable for them to rebuild

One rule: it cannot be caused by aliens or AI invading the planet. But it is okay if an alien race causes the destruction in any other way. It's an Earth-like planet. I need the effects of the ...
2
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0answers
72 views

What are the effects of mass extinction? [closed]

In an “Ancient Greek” technological world a magical plague causes the extinction of all animals larger than a chicken, or say 5lbs/2kg. Some Humans and small animals (cats and dogs) survive this by ...
8
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5answers
300 views

Is there a way for human-sized oviparous humanoid mammals to produce young in eggs without going the full marsupial route?

As per my last two questions asked, I still have a niggling query left regarding a humanoid species in production. To further support their matriarchal theme through evolution, I have decided to make ...
5
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2answers
461 views

What alterations without drastically altering their humanoid shape nor horns, can I make to my species that lower the risk of neck snapping?

continuing from the question I had asked yesterday, I have had another query come to mind. For my humanoid alien species to possess horns, it would surely put forward the risk of being the shortcut to ...
7
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3answers
526 views

Aliens selectively breed humans to be bigger. How big could they get and still look human?

Can we go from this: to this: Suppose over millennia (or as long as it takes) humans on Earth are artificially selected by aliens to be big and healthy. Is there any theoretical reason that they ...
4
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2answers
130 views

How would the anatomy of a metal-eating bug work out?

Background: The creature is bug-like, and similar to an armadillo in size. Its diet consists of metal, and is found underground in large colonies. It uses the metal it ingests to: Enhance it's shell ...
6
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4answers
242 views

Is it plausible for a being to possess a singular halo-shaped 'horn', while other members of the species possess two 'regular horns'?

I am currently working a humanoid roughly deer-like species in a sci-fi roleplay setting, and one of the developments I have had with such species has me stuck trying to explain it in a way that makes ...
5
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3answers
199 views

What kinds of minerals or compounds could radiate heat?

I'm working on an RPG in a world with some magical elements, like a type of energy (so far unnamed) inherent in animals and humans. Those with high amounts of this life energy in them are thought of ...
6
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2answers
545 views

Weaponising the Tesla earthquake machine or modern equivalent

In 1935 at his annual birthday party/press meeting a 79-year-old Tesla related a story where he claimed a version of his mechanical oscillator caused extreme vibrations in structures and even an ...
4
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3answers
1k views

What is the Habitable Zone of a Red Dwarf star?

This question is pretty straightforward: What is the minimum and maximum distance for a planet to be in the habitable zone of an average sized (not biggest, not smallest) Red Dwarf star?
0
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1answer
148 views

How would immersion in water affect a gas-mask?

As he debuted his super hero career as an unlicensed superhero, my main character always wears a gas-mask to conceal his identity and protect himself against tear-gas from police force. Before ...
3
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4answers
193 views

How wide would a Whipple shield on spacecraft traveling at near-luminal speeds need to be?

I was thinking about the classic beanpole design for interstellar travel. Wouldn't the Whipple shield need to be at least twice as wide as the ship is long to fully protect it from collisions with ...
6
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2answers
193 views

Can I contain and control a small black hole within a facility?

A black hole is supposed to suck in everything by nature. Micro black holes are theorized to "fizz out", so for example if one was on Earth it would not grow until Earth was consumed. It would seem ...
17
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9answers
4k views

How difficult would it be to turn the Asteroid Belt into a single body? What's the best method?

The Emperor (may he live forever) plans to visit the Solar System on a rare royal visit in ten years' time. The Bureau for Interplanetary Tidying have decided that the Asteroid Belt is an eyesore that ...
0
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1answer
182 views

Would these structural reinforcements improve dragon wings?

So, I have devoted an unhealthy amount of my time to the dragon question, and a final solution will have to wait... for several thousand years at least. My original plan was to make them at around ...
31
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2answers
3k views

Earth becomes a rogue planet - how long can Iceland hold out?

Inspired by this question and my comment on one of the answers. If the earth were flung out of the solar system, it would rapidly become far too cold for any unprotected life to survive on the ...
1
vote
1answer
120 views

How fast can directed evolution make the leap from unicellular to fishlike ability level? [closed]

Premise target: A few thousands of intelligent machine-scientists have been tasked on the creation of an organism with the abilities of an animal. The exact requirements that they are given are: Can ...
7
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1answer
211 views

What is a realistic computational limit for a handtool-made mechanic computer?

This question here brought up interesting points on what kind of distribution we could expect for the increase in computational power of mechanical computers in a world relying solely on such non-...
8
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7answers
1k views

How can an individual with Superman like powers best harvest asteroids?

In a story I am writing there is a being with Superman level strength, flight, the ability to produce lasers, and survive in space. He has decided to solve the mineral crisis by finding and grabbing ...
6
votes
9answers
3k views

Conquering the Galaxy with DNA - What is the best vector?

An evil emperor wants to conquer the Galaxy. Before sending humans he wants to send out an advance force that will subdue other life-forms. The Emperor's Adviser comes up with the idea that the ...
17
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4answers
358 views

Is a coral-based planet possible?

Inspired by this answer and the mention of a hyperbolic plane, I've been imagining a world based on that geometry. The closest real-world example of such a geometry I can come up with is hard coral. ...
10
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4answers
2k views

Could we use both speed and heat to penetrate Europa's ice?

Could we fire a heavy, long (e.g., 50 meters), spear-shaped object into Europa's icy-surface from space and then, when momentum stops, gravity gradually moves weights down inside copper tubes the ...
3
votes
1answer
133 views

Modern technology in an ancient China-like world

My character has transmigrated to a world that has some magic. She is looking to bring some basic surgery and investigation methods from her earth-like world to this world, which is roughly ...
4
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3answers
86 views

Electrolysis Assisted Aerobic Organisms [closed]

Hi this is my 2nd question on the site and I hope it is intriguing to you all. My question is: How feasible is it for an organism to sustain an Aerobic lifestyle (ie. the standard oxygen cycle found ...
0
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1answer
150 views

What could be added to cigarettes to enhance soldiers?

Some of our soldiers that keep our border safe have brought back a new "commodity" used by Evorian (Border country) soldiers. They call them "cigarettes", and they have become pretty popular in our ...
18
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5answers
6k views

Chainsaw airplane: Feasibility study

In my dream I have been chased by a plane which had chainsaw blades instead of wings. That woke up my inner worldbuilder and instead being terrified, I started to wonder if something is even possible. ...
3
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5answers
164 views

How can humans naturally develop the ability to control their mental faculties while suffering the physical effects of fear?

Fear has been a helpful trait that has kept our race alive since back in the day. It continues to be necessary for survival as a species. However, it can be just as harmful. When faced with death or ...
13
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4answers
3k views

How tall can you build a mountain chain of bricks?

My ancient golden dragon has a lot of time, since he doesn't die of old age in my world, and a lot of magical constructs that will tirelessly built a defensive mountain chain for him. This chain will ...
5
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2answers
304 views

How long does it take for biological matter to decay in space?

I have been looking up a few different theories lately. And one of those is the idea that intelligent life cannot exist for any long period of time without eradicating itself or being destroyed by ...
8
votes
7answers
832 views

Is a Selective Breeding Program to Create Enhanced Humans Plausible?

The idea is that the concepts of DNA, inheritance, and micro-organisms were discovered significantly earlier in history. Roughly 50 years after the founding of Alexandria as a city state in 332 B.C., ...
2
votes
1answer
81 views

How might clouds be produced in a large underground fantasy realm?

I'm attempting to give my fantasy world weather/clouds, (some might be light-producing to add to other light sources, so if there's a scientific way to do that, please give it to me). There are ...
3
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5answers
263 views

How to create a sunny atmosphere without an actual sun?

I have a large underground fantasy world which is only accessible through the Mariana Trench. I'd like to do a day/night cycle and have have a bright, sunny atmosphere part of the time, but I'm not ...
43
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18answers
10k views

City made of glass in a desert?

My world has a city of glass found along the outskirts of a desert. I decided on this because sand can become glass and so it was a huge resource that could be used for building. However, the concern ...
19
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15answers
4k views

Stopping a Planet Cracker?

One of the issues with creating a model of space warfare that is both realistic and interesting is the ease with which one can destroy things using high-velocity kinetic kill vehicles (KKVs). For a ...
8
votes
5answers
1k views

Distance between star systems

I'm writing a story that will eventually escalate from being focused on one planet to the entire star system that planet belongs to, and finally to a big story involving the two nearest star systems ...
3
votes
1answer
99 views

How can I turn diamond into graphene?

The goverment of Africa decided that it would no longer tolerate the diamond mafia, so the corporation of DeBeers was hunted down and disbanded, to put it lightly. Now, all the diamond mines have been ...
2
votes
2answers
124 views

How can I destroy a planet with antimatter?

So I found the base of these pesky rebels on this planet and I am tasked with destroying the planet to eliminate the rebels once and for all. Unfortunately, my death star has malfunctioned and has ...
24
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7answers
6k views

How durable would a person need to be to survive impact at terminal velocity?

For a fantasy race, or for bio-augmented humans, how durable would they have to be to walk away from a 1000ft free fall unscathed? And how would this logically translate to other forms of durability? ...
8
votes
3answers
202 views

What kind of transports would be invented in a world with an enhancer-material?

You have a material that greatly enhances electric and magnetic sources or electro-magnetism in general. In this world, the material, is known to be a naturally occurring liquid found in geological ...
10
votes
4answers
726 views

Feasibility of a purely mechanical grayscale “computer monitor”

Based on a previous question asking about mechanical computing (Babbage engines, etc.) I wondered how a steampunk story could present the concept of a modern computer monitor in a steam-driven ...
8
votes
6answers
360 views

How can a planet full of zombies reproduce and maintain its population?

How can we have a world that is inhabited only by zombies and yet continues to be populated? For the purposes of this question, I envisage the type of zombie that has been infected by a virus, is ...
23
votes
8answers
5k views

Would Moore's Law apply to mechanical computers?

We know through the works of Babbage, Lovelace, et al. that mechanical computers (computers operating through gears, cogs, etc., and powered by steam or some other arbitrary non-electric power source) ...
-2
votes
6answers
225 views

200G to 1G environment

Let's say a human were to live most of his life in a 200 G environment but then suddenly enter a 1 g environment, What would be the effects to his body and will this give him the ability to carry ...
0
votes
4answers
285 views

What would the effects be if all power grids connected to nuclear reactors abruptly suffered catastrophic failure?

To be more specific, I mean what if every wire, every power cable and transformer on the connected grids to the nuclear power plants all ruptured at once. The transformers literally exploding, the ...
3
votes
3answers
259 views

How to use and maintain assault rifles brought to the past

A group of time-traveling soldiers ends up in 15th century Europe. They have an arsenal of either AR's or SMG's and need to use them until their resources (ammo) run out. How can they maintain the ...
1
vote
6answers
170 views

Gaining energy from draining your Happiness

In my world there is a villain who rules over the unhappy. In fact, we recently determined that he actually absorbs their happiness and uses it as energy to make himself stronger. This world does, in ...
4
votes
2answers
60 views

Stellar and magnetic parameters for creating polar radiation hazards

I've got a generally earthlike planet, but my goal is to make radiation exposure in the polar regions a much larger hazard than it is on Earth, while not being an issue in other regions. Nothing ...
7
votes
8answers
2k views

How can I turn ice into gold?

I have my eyes on this new Porsche but all I have is an unlimited supply of ice and a molecular distillery. How can I convert this ice into gold? The molecular distillery can disassemble and ...
7
votes
1answer
177 views

Determining this horseshoe/co-orbital moon's possible orbital periods

I've been working on a system with a habitable moon (Moon A) for a story, and I'm now trying to populate the other moons around the parent planet. I'm considering placing one (Moon B) in a co-orbit, ...