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 because it describes how the question should be answered, not the topic.

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3
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3answers
131 views

How to build an installation that utilises a perfect filter to get gold from the oceans?

In A perfect filter spell. What knowledge could it bring? I described a magical filter. The common suggestion of filtering out metals (specifically gold) dissolved in water has been wracking my brain. ...
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6answers
214 views

Science and Physics of Portals

So I have a character who uses various portals to store and deploy his weaponry and tools. These portals are 2 dimensional portals like those of the game Portal. I have had little trouble with this ...
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6answers
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What are the minimum historical changes that would permit the use of paratroopers at the beginning of World War I? [closed]

What are the minimum historical changes that would permit the use of paratroopers at the beginning of World War I, so that they accomplish the following requisites: It should be maintained a heavy ...
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10answers
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What single change would have given the best chance for the Central Powers to win World War 1?

A common topic in alternate history fiction works is what would have happened if a major war had been won by the other side. These usually focus on the events after the war, and the change itself is ...
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5answers
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How to make this lightning strike real without technology or magic?

Everyone knows that dragons tend to breathe fire in stories, but some are differentiated containing dragons that breath lightning and it is the latter that interest me at the moment. I researched ...
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4answers
127 views

Why link supercomputers in a sequence instead of all together?

My sci-fi story has this girl, let's call her "Lucy". She finds herself virtualized into a simulation within one or more supercomputers, which translate programs and inputs into visual cues; ...
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3answers
323 views

Would the seasons on this solar system be too extreme for Earth life to thrive?

In this artificial galaxy, there is a trinary of quasar stars at the center, each one 1.5 trillion times as massive and 995 trillion times as bright as our sun, each one having its own ring of mirrors,...
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4answers
134 views

Is it possible for extraterrestrial plants to produce oxidants other than oxygen gas?

Oxygen is a byproduct of photosynthesis because photosynthetic organisms on Earth use water as the electron donor. However, the first photosynthetic organism emerged from ocean where chloride is also ...
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2answers
141 views

Biological Electrolaser

I was researching about electric dragons whose electric breath can be explained scientifically, and I found this post(Plausibility Check: Is it possible to make a lightning dragon plausible?). In it ...
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4answers
213 views

The effect of extra limbs to an alien creature's speed

For contextualization, in my world a phenomenon caused anomalous "creatures" (for a lack of a better term) to appear. Among these, I planned to have "creatures" capable of running ...
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1answer
89 views

Could a lake be seeded on Mars and sustain an ecosystem, including fish?

The temperature, pressure and radiation are all not optimum on Mars for life. But if the pressure were several fold higher (20-30 mbar instead 6 mbar), the temperature 5C higher, and with less ...
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10answers
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Nuclear weapons with 1850s technology

Let's say a group of people in the 1850's had access to all modern knowledge of nuclear physics, but nothing else from modern technology. They have at their disposal resources equivalent to those of ...
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5answers
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Antimatter accident afterglow?

Per this question I've been giving thought for some time to restricting the use of antimatter and it occurs to me that an object lesson in what can go wrong might go a long way to discouraging its use....
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2answers
121 views

How could fluoride salts occur naturally?

I've been looking around the internet but I can't seem to find out how fluoride salts would form naturally. My end goal is for my planet to have a mildly high concentration of hydrofluoric acid pools, ...
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3answers
116 views

Solar-powered monster charging stations?

Lets assume we have a super advanced intelligent, possibly magical, Entity that wants to enroll Earth in a fun episode of monster invasion by making a bunch of demons and releasing them on Earth. The ...
6
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1answer
82 views

Could a slow rotating planet be protected by another's body magnetosphere?

I'm working on a slow spinning planet whose rotation period lasts around 24 Earth-years (about 8766 days). It would be a rocky planet similar to the Earth in size and mass orbiting a K- or G-type star ...
6
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3answers
115 views

How might parrot's feet change if they adapted for semi-aquatic life?

I'm creating a fairly whimsical kid's fantasy world, so I don't need 100% accuracy- however, one of the major themes is respect for the environment (and spec evolution is a big interest of mine) so I ...
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3answers
240 views

Climate on a slow spinning planet

I'm currently working on a story set in a planet whose rotation period lasts around 24 years (Earth years, or 8766 days). This planet orbits at more or less 0,75 AU from a K-type star, and the ...
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1answer
80 views

Concerning Earth plants on an alien world, how much "sunlight" would "too much" and "too little" be compared to our sunlight?

In a binary system of artificially immortal stars, each one orbited by a ring of mirrors, a whole line of Earthlike planets orbits the binary within its habitable zone, from 400 to 800 AUs. While ...
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1answer
111 views

Is it possible for radon to exist at consistent levels in an atmosphere for 10,000 years?

On an alien planet, could it be possible for a foreign species of aliens to somehow convert the atmosphere to consist of a small amount of radon (10% or less) for a fairly long amount of time (around ...
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2answers
111 views

Urban and suburban architecture on a perpetually stormy planet

In a setting I'm working on, a raised megacity the size of Switzerland (roughly 300,000 square kilometres) serves as the last refuge of humanity on a planet entirely covered by a global ocean. An ...
2
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2answers
98 views

Bokoblins: Biologically Feasible?

I asked a similar question on Lizalfos, and now it's time for Bokoblins. Bokoblins in Breath of the Wild seem to combine apes or hominids with pigs, which is more than a little odd as I've seen boars ...
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2answers
1k views

Clone consciousness using fake childhoods. Is it plausible?

I am working on a sci-fi story and need a way to clone a person, body and mind. I also want it to be done without "far future technology" where anything goes. I want it to be simple and ...
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1answer
77 views

How much electricity a cloud can generate?

Introduction If lightning in the storm clouds is generated by the friction of ice crystals and water droplets, it would make sense that any type of cloud can generate static electricity, albeint in ...
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1answer
101 views

Lizalfos: Biologically Feasible?

I was recently playing Legend of Zelda: Breath of the Wild and became fascinated by whether something like Lizalfos could develop, given the right conditions. The idea is to create a realistic version ...
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0answers
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In regards to mass and luminosity, what are those mystery stars?

Long ago (4.6 billion years, to be exact), a hyper-advanced alien civilization had created a solar system from scratch. Somehow, they had artificially prolonged the center of the solar system--a ...
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10answers
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What phenomena can explain not detecting a planet while detecting a more distant planet?

Humanity detects a very suitable planet, lets call it Vaung, that is roughly 80 years away from us with their current technology. A ship is made and sent to colonize it, same old stuff. The issue is ...
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2answers
162 views

Other possible pykrete like, ice based alloys?

Pykrete is composed of sawdust and water and as a result freezes at 28 F, are there any other solutes or materials with which one can make ice alloys? I was wondering if there were any cheap easy to ...
2
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1answer
131 views

Consequences of a false magic tattoo

Silly question (you've been warned). Let's say the magic users of my world devised a way to place lasting charms on people - by tattooing them. That process involves specifically prepared inks ...
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0answers
112 views

Largest possible biomass on any given exoplanet

Suppose you are the hypothetical architect of a new exoplanet, who's been handed the job to maximize this exoplanet's biomass. Given the current knowledge of life as it is, and thus leaving any sort ...
4
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2answers
90 views

Liquid Fertilizer

In this post I asked if it would be possible for a species of bird to create saliva capable of curing animals (even those of other species) and stimulating plant growth. The answers and comments ...
3
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1answer
122 views

What would weather be like in an O'Neill Cylinder with windows?

I've got an O'Neill Cylinder that's virtually identical to Gerard O'Neill's original design, only scaled up a bit to allow for more surface area. The cylinder is divided into 6 sections, 3 windows and ...
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1answer
114 views

How large would Alpha Centauri AB be in the sky, when observed from exoplanet Proxima C?

Context: I am creating a hard science-fiction world set in the Alpha Centauri system. How large and bright would the binary star Alpha Centauri AB in the sky, when observed from an exoplanet (Proxima ...
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5answers
242 views

Would Moons of a gas giant appear to phase when looking at them from another, tidally-locked Moon?

I'm designing a fantasy world on a tidally-locked moon of a gas giant. Because it's primarily a medieval fantasy set on the outward-facing side of the home moon, I'd like to keep units of time similar ...
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2answers
60 views

Conditions for tilted gas giants [closed]

I have been working on further refining the solar system that would serve as the setting for my narrative project and in particular I'd like to settle one issue that's been on my mind. I have been ...
2
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3answers
341 views

What would make a planet have a different sky colour?

If I have an earth type planet with a slightly higher cloud cover (62%) and a brighter star (1.22), would the sky change colour?
5
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5answers
228 views

How big does a floating island have to be for the effects of motion sickness to be negated?

Assuming a floating island is built from plastic trash or barrels how big would it have to be for motion sickness to become irrelevant?
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5answers
1k views

What would boats look like on a planet with two moons?

For the purposes of this question, let us assume that one moon is similar in size to Earth's but slightly further away and the other is significantly smaller but approximately the same distance away ...
0
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0answers
79 views

Light Gas for Large Flyers [duplicate]

I'm kind of on a journey in search of how to scientifically explain fantastic creatures in a way that doesn't rely on magic, because I think that makes things more interesting. Currently my biggest ...
0
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0answers
52 views

What type of calendar can use people after colonization of solar system and other stars? [duplicate]

I'm making game about distant future where people colonized space. They live at Earth, Moon, Mars, Venus, Mercury, gas giants moons and also on exoplanets. If I use Earth calendar, it will be ...
4
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3answers
172 views

What threat would a highly technological alien species from a superEarth pose to human(-like) visitors?

I'm writing a setting where superEarths abound, frequently with intelligent life, but Earth-size habitable planets are rare, with the focus being on the five intelligent species from Earth-size ...
11
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2answers
244 views

Do stars work in hyperbolic space?

Any curved space is approximately Euclidean on small enough scales, so for a sufficiently large characteristic length (significantly larger than the radius of the smallest real stars) the answer is ...
3
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1answer
113 views

How should the stomach be changed to increase the efficiency of extracting energy from food during digestion?

I am writing a novel about anatomically plausible superhumans (a new kind of man) who had to evolve in conditions of some food deficiency, living, for example, in high-altitude conditions or semi-...
2
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3answers
121 views

How would you use volcanic magma to create massive islands the size of Indonesia etc?

I've read an answer explaining how it could be done but I was wondering what anyone thought about creating island chains the size of continents etc. using magma under the ocean. What would be the ...
5
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5answers
168 views

Rapidly building a world-spanning communication infrastructure

In 2028, all the major telecommunications companies unified. "We already have to work tightly together in order to maintain cross-continent communication systems, and we can reduce costs if we ...
2
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1answer
244 views

Remote listening device inside human ear and powered by the body

Some related (but not the same) questions: Listening (eavesdropping) device that can be put into victim's ear? (which is closed because of the need to focus) Microphone implanted in and powered by ...
3
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2answers
131 views

Do my colonists stand a chance? A world of super-materials

When the first explorers returned from the New World, it was with terror in their eyes. Violent shores, a jungle with trees taller than hills, and unspeakable monsters behind every towering frond - ...
7
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1answer
95 views

Ranges of aurochs, bison and wild horses

I'm working on a setting where one of the large continents is similar to North America before the arrival of humans, including a biome containing the three large grazing ungulate species: aurochs, ...
3
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4answers
206 views

How to Create the Galactic Habitable Zone

Our galaxy consists of a wide number of stars, anywhere from 100 to 400 billion stars, with just as many number of what are known as "habitable zones", in which liquid surface water is ...
4
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2answers
189 views

I need help with my ocean currents

I haven’t really ever gotten this far in worldbuilding, and I’m kinda stuck on ocean currents. My world has lots of tiny little islands that are on 2 slightly submerged continents (around 3 metres ...

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