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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.

1
vote
1answer
88 views

Creating a Matryoshka Shell World: Sectioning

In my previous two questions regarding temperature regulation and Rotations I set up the idea of creating a multi-layered shell world consisting of planetary crusts stuffed inside one another creating ...
7
votes
4answers
257 views

How is infra-vision any good?

Supposing a world like the Underdark, full of civilizations that developed and live their lives completely away from the light of the sun. In the typical D&D type setting, these creatures have ...
0
votes
4answers
128 views

Question about climate and geography

I have been asking around a bit because i am trying to create a world for a story i'm writing. And after some loose questions i think the better way to get an answer will be to just list the criteria ...
3
votes
3answers
438 views

What alloys and metals can fantasy dwarves refine/create? [closed]

What metals are dwarves capable of refining and producing? I'm working on a setting where the players have a lot of meta knowledge (Computers and nukes in a pre-industrial world anyone?¹) and need to ...
0
votes
4answers
84 views

Worldwide climate [duplicate]

Is it possible for an entire planet to have the same climate? So lets for example say an entire world with a northern european (scandinavian) climate and accompanying geography. (No deserts, no ...
4
votes
2answers
196 views

Could a person safely walk around with exposed skin under the sunlight of a red dwarf when it's not flaring?

I've been thinking about a fantasy setting built around the idea of a habitable, tidally-locked world orbiting a red dwarf. Since it is fantasy I do have some leeway in terms of the real world ...
5
votes
2answers
177 views

Would a geologically ancient world be habitable?

Assuming an earth-like planet, but with several billion more years of cooling and settling (and with no moon to create tides). I'm imagining this planet would be geographically and tectonically ...
2
votes
2answers
108 views

Equatorial or Meridial Ocean

I am building a world that is mostly land but i need something to divide it all up a bit so i decided I'm adding an ocean. What i want to know is the following: Would it be even remotely possible ...
23
votes
10answers
3k views

Realistic geological and chemical composition of an edible planetary surface

We all at some point in our childhoods thought that the moon is made out of cheese. As such, I thought: under what circumstances can a planetary surface form in such a manner that it is edible (and ...
2
votes
2answers
176 views

At what altitudes would clouds form to produce rain on this world and with what general severity?

Planetary surface: | 71% Ocean (H2O) | 29% Land | Atmospheric composition: | 2% Trace gases | 58% Nitrogen | 26% Oxygen | 11% Argon | 3% Carbon dioxide | Average surface temperature: 36 ...
2
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6answers
4k views

If humans were biologically immortal, but had an average lifespan of 100 years, what would the distribution of ages be?

Let's say that humans were biologically immortal. Once they reach adulthood, they effectively stop aging. Due to disease though, the average lifespan is 100 years. (In practice, your access to ...
11
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6answers
660 views

Would a flying superhuman leave a contrail behind?

I'm writing a speculative fiction story that includes superhumans, and I'm trying to get some of the specifics nailed down. Several of my superhumans have the typical powers of flight, usually able to ...
-1
votes
1answer
81 views

Estimates for undetectable planets in extra-solar systems [closed]

Based on answers and comments on some previous questions (especially this one), and as very clearly illustrated by the scatter-plot here, there are some very definite limitations on our ability to ...
4
votes
7answers
209 views

Most cost-effective way to fence in an alien wildlife preserve

As a linguist aboard a terraforming mission, you arrive at a new planet. The planet, orbiting a G2V star, has copious amounts of wildlife and some sentient lifeforms. However, you, interpreting an old ...
14
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14answers
7k views

How would aliens test humans for empathy?

500,000 people have been kidnapped from all over the world by aliens. The aliens want to see if humans have empathy, and they can't understand our languages, as we speak they hear just random noises ...
3
votes
0answers
66 views

What would happen to the surface of the earth after a GRB hit? [closed]

I was told to shorten my question to a number of different questions altogether. Let's say that WR-38 blasted Earth, what would happen to the surface of earth? More specifically, how would the ...
2
votes
3answers
192 views

What are some real world examples of mental impairment i can use for my magic system?

My question: What are some real word diseases, disorders, drugs, effects, etc. that interfere with a person's thinking-ability (but do not cause blackout)? I am creating a magic system in which I ...
5
votes
2answers
246 views

How far can a human see?

I'm asking this question as a reference for use in worldbuilding when developing world size, atmospheric content, or alien optometric abilities (aka, vision). While I'm specifically asking two ...
6
votes
3answers
2k views

What is the most plausible way to rule out string theory?

I writing a story about a physics student who has a difficult relationship with his estranged father, world famous physicist and strong proponent of string theory. As a revenge he wants to rule string ...
2
votes
2answers
110 views

Could a Superhero with radio wave powers hear the radio?

Is it was technically possible for a superhero that senses radio waves (like low frequency EM) to “hear” the radio? This superhero senses radio waves a bit like we can see visible light, though not ...
-1
votes
2answers
102 views

How can you safely extend childbearing age if menopause isn't a factor?

The chance of conceiving quickly does depend on a woman's age. Women are most fertile between the ages of 20 and 24. The average person is born with around 300,000 eggs and steadily loses them as she ...
5
votes
4answers
198 views

If an alien had evolved on a planet with 10 times Earth's gravity, how far into Earth's Ocean could they dive?

Let's assume that this hypothetical alien crawled out of the identical primordial ooze to the point where they share significant genetic similarity with humans, and due to either evolution or outside ...
3
votes
1answer
328 views

How could a species have naturally developed metalic looking hair?

The key idea in the concept of metallic hair color is the word “metal.” Metal is shiny. Metal is iridescent. Metals come in a range of finishes from warm gold to icy silver. Metallic hair colors, at ...
4
votes
4answers
178 views

How can an individual that consumes the biomass of others not experience any weight gain?

An artificially created organism called a symbiote has escaped from a research facility and has infected a human host. It has given this human new abilities, including super strength, speed, ...
2
votes
2answers
62 views

Do we know which traits reside in which chromosome? [closed]

I'm intrigued with the possibility described in Is it plausible to make human gametes from different parent chromosomes?. Assuming that humanity developed technology that allows us to make sperm and ...
4
votes
2answers
105 views

Strip Mining Deimos, is it worth it?

In Warlords Mars was once home to a thriving mining business, until Prometheus cracked open Deimos that is. Now the mines have either been closed or have scaled down dramatically leading to mass ...
5
votes
2answers
101 views

How do I tune the incidence of gene expression in my fictitious population?

Related questions How can I make a net beneficial genetic trait occur only in a small fraction of the population, sustained? What percentage of the population has the “magic gene”? Premise When ...
7
votes
5answers
254 views

Is it possible for a terrestrial creature to generate lightning?

Question Context: I've been developing insect-looking bipeds that have evolved on a mostly jungle/ocean planet in addition to small, scattered grasslands. This is justified (from what I've read) by a ...
3
votes
2answers
124 views

Would it ever be possible for humans to adapt to Jupiter's gravity?

If humans could travel to Jupiter, what ways would we have to adapt to the high levels of gravity? Would your blood flow to your legs and kill you from lack of oxygen in the brain? Would you get ...
10
votes
3answers
480 views

Is it plausible to make human gametes from different parent chromosomes?

I'm creating a near future world where laboratories could create human gametes (sperm & ova) using chromosomes from different people. So theoretically we could take 1st chromosome from a 1st ...
4
votes
4answers
218 views

Creating a Matryoshka Shell world: temperature regulation

In a galaxy far far away, during a fit of inspiration for a super massive marvel of technology, the Imperator dedicates an astounding 10% of energy and materials from his civilization's dyson sphere ...
5
votes
1answer
179 views

Converting Neptune into a diamond planet

This question was inspired by this one, questioning the methods one may use to attach structures to the surface of a diamond world. The idea of a celestial body largely composed of crystal diamond ...
4
votes
5answers
304 views

Civilization on a diamond exoplanet?

If humans discovered a diamond exoplanet and then traveled there, how would they set up civilization on a diamond exoplanet? Everything needs a foundation, even on low-gravity planets (below 9.8m/s^2)...
1
vote
1answer
135 views

How humans could establish a colony on this planet? [closed]

Yesterday I created an exoplanet on Space Engine, and then started to imagine how life could be possible on that little rock. I started to think about bacterial cells / archaea, anaerobic organisms ...
3
votes
2answers
135 views

Can Mollusks Develop Bone Independently?

When one thinks of a shelled cephalopod, odds are high that the first thing to come to mind are the ammonites. They were one of evolution's success stories, thriving from 400 to 66 million years ago. ...
3
votes
3answers
189 views

Landing Pad Using Lenz's Law

In my universe technology is advanced enough to have non-jet and non-rocket booster technology. For a disc shaped UFO all of the technology is crammed in the ship and there was no more room left for ...
37
votes
13answers
8k views

Scientific/biological basis of someone with unlimited willpower?

Meet Greg. Greg was born with pretty average genetics. It seems like he was destined to have average intelligence, average strength, and be average at everything. There was one particularly though: he ...
1
vote
2answers
96 views

What would be the day-to-day ramifications of a post-encryption digitally-connected cyberpunk society? [closed]

If any encrypted data could be decoded within a day (or shorter, to the point of hours, given enough computing power and weak encryption), all wireless transmissions may be intercepted, and all copper/...
1
vote
2answers
414 views

When two continents crash against each other, mountains arise, right? [closed]

In the background of my world it happens that two continents crash against each other. Now that I've done some research, do I correctly understand that this would create a mountain range? Or did I get ...
1
vote
0answers
49 views

How can 4 limbed animals evolve from 6 limbed animals? [duplicate]

An idea that I've been having to logically explain the evolution of 6-limbed animals is that they naturally have a common ancestor. This is illustrated in this picture I found: Source: Birvan from ...
3
votes
3answers
188 views

Could a comet cool down global tempatures? [duplicate]

In warlords I wanted Terrans to have a fad of big (synthetic) fur jackets, but I didn't want too have everyone running around in winter clothing for no good reason so the solution my mind instantly ...
6
votes
2answers
107 views

Avian adaptation to microgravity and low gravity environments

I like to hear the sound of birds when I travel amongst my orbital and planetary habitats scattered around the outer system. Most of these settlements are very densely populated - what you might ...
6
votes
2answers
653 views

Habitable zone around a Blue Supergiant

I am writing a story centered around a planet orbiting a Blue Supergiant star. What I want to know is how far away a planet would have to be to be in the habitable zone of such a star. The star I ...
4
votes
3answers
184 views

What are some real world sources of mental impairment that I can use in my magic system? [closed]

What are some real word diseases, disorders, drugs, effects, etc. that interfere with a person's thinking-ability (but do not cause blackout)? I am creating a magic system in which I want to create ...
2
votes
3answers
201 views

Where to have a colony after Pluto?

I have a world where humans have developed interplanetary space travel that allow them to travel to other planets. There is an issue though- the speed is slow, sublight; as an example it will take at ...
1
vote
4answers
191 views

Biology of hermaphrodite species

How from a evolutionary standpoint hermaphrodite species can exist and have a good genetic diversity, with no self-impregnation? But, this race visually looks more like females, they do have breasts ...
-6
votes
1answer
147 views

I want to make a super OP dragon that breathes fire underwater [duplicate]

I want to create a super Over-Powered dragon that can: Breathe fire Breathe fire under water Not harm itself while breathing fire (either above water or under water) I would like answers that are as ...
12
votes
2answers
1k views

How much hydrogen and oxygen can I add to an atmosphere before it explodes?

Hydrogen and oxygen gases can be combined to form water and a lot of heat. As with many exothermic reactions, the heat from this process can provide activation energy to the reaction of more H2 with ...
1
vote
1answer
82 views

Is this planet's sulphur dioxide atmosphere feasible?

My planet is highly volcanic, as such the atmosphere is filled with gases put off by the volcanoes: Like Earth Nitrogen also makes up most of Marhdii’s atmosphere at 43%. Also like Earth, Nitrogen ...
4
votes
8answers
2k views

In an animal without lips to moisturize the teeth, what would be the best structure for the teeth to be made out of?

Our teeth are prone to fractures when dry due to their crystalline internal structure. Because of this, a majority of terrestrial animals with a similar tooth makeup have lips to keep the teeth moist. ...