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Questions tagged [science-based]

For questions that require plausible (better than suspension-of-disbelief) answers based on Real World science that are not necessarily constrained to the known limits of Real World science. Contrast with the hard-science, science-fiction and internal-consistency tags. This tag may not be used alone. This tag may not be used with the science-fiction, hard-science, or internal-consistency tags.

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What would sunsets look like around different star types?

I have always wondered what a sunset would look like around different types of stars. I have tried to do some research into the types of light refraction, but I cannot find any answers anywhere, and ...
Rory 02's user avatar
  • 191
0 votes
0 answers
26 views

Reasons/excuses to evolve and retain handlike manipulatory appendages

As you may know, humans' arms and hands are a direct callback to the times when our ancestors lived in more arboreal settings (monkey swing on tree type stuff)... we needed to be able to grip branches ...
Max Bird's user avatar
  • 519
7 votes
1 answer
153 views

The Lost Continents of Atlantis and Mu reappear: Disruption to Transport

In a single event, the lost continents of Atlantis and Mu arise from the deeps over the course of about half an hour, accompanied by a low-magnitude earthquake felt worldwide. For the purpose of this ...
Monty Wild's user avatar
  • 63.3k
3 votes
1 answer
70 views

Is it possible for plant life to evolve (and adapt) on a low CO2 planet?

C4 photosynthesis, which can operate in Carbon Dioxide levels as low as 10ppm A question related to these two questions: Habitable inner planet with large oceans, fast rotation and earth-like ...
casualworldbuilder's user avatar
1 vote
1 answer
84 views

How would I calculate the damage someone suffered from various strikes? [closed]

So, I’ve been developing a TTRPG and am wanting to present a realistic fantasy world. This doesn’t mean fantastic things wouldn’t happen - demigods can swing swords at the speed of light. But when ...
Oogabooga's user avatar
5 votes
3 answers
1k views

Would human-shaped sperm cells work?

After looking at videos of sperm cells, they reminded me of someone swimming. I've decided this was a neat idea for me to integrate in my worldbuilding. For lore reasons, I have a group of people with ...
Dmyt's user avatar
  • 787
4 votes
6 answers
2k views

Natural mechanism behind burning oceans

I have an alternate Earth with no humans where massive patches of the oceans are supposed to be burning. The fires do not come from artificial or man-made causes. The flames themselves: have lasted ...
Dmyt's user avatar
  • 787
3 votes
2 answers
128 views
+100

What factors can I use determine if my runaway greenhouse planet will have a thick water vapour atmosphere?

A question related to this question When Earth’s oceans evaporate, one of two feedback situations could occur: The "moist greenhouse" where water vapour dominates the troposphere while ...
casualworldbuilder's user avatar
0 votes
0 answers
59 views

How will the monsoons work in this boomerang-shaped supercontinent?

Back and forth, I have created a fantasy supercontinent shaped in the likeness of an asymmetrical boomerang, with its elbow enlarged to resemble a fish’s head pointing westward, its lifting arm long ...
JohnWDailey's user avatar
  • 14.6k
3 votes
3 answers
177 views

Point defense weapons on bio-mechanical spacecraft that part of von Neumann machine horde

I am currently working on a concept for a science fiction novel about interstellar warfare in the 24th century. I am wondering about the best point defense weapons for biomechanical space combat ships ...
Akifumi 121's user avatar
2 votes
2 answers
81 views

Role of mouth size in ability to replicate human phonemes

(If you're uninterested in any of the background info, boiled down question is in the second paragraph) As part of my worldbuilding, I have become very interested in conlanging; of particular interest ...
Max Bird's user avatar
  • 519
3 votes
1 answer
114 views

Is it reasonable that my human-habitable alternate universe look different?

In the story I am planning, I wanted to have two universes, one just like ours, in which humans evolved, and another that is sufficiently similar to our own that humans may survive, but in which ...
Monty Wild's user avatar
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11 votes
8 answers
3k views

Mechanism behind a pink human skeleton

I have a group of genetically engineered humans with pink $\color{#fe019a}{\text{(#fe019a)}}$ skeletons. The humans are naturally born with it so it isn't transplanted. Furthermore, the skeletons are ...
Dmyt's user avatar
  • 787
-2 votes
2 answers
82 views

In a fantasy world with an inconsistent atmosphere, which latitude would have an atmospheric density of 1.0 Earths?

Imagine, if you will, a fantasy world so fantastical in regards to physics that one of its telltale signs of disregarding the laws of physics is how atmospheric density is tied to latitude. At zero ...
JohnWDailey's user avatar
  • 14.6k
6 votes
2 answers
308 views

Habitable inner planet with large oceans, fast rotation and earth-like atmosphere

According to several articles (such as this post), a habitable inner planet (more than 1.1x Earth’s insolation) could realistically form with liquid water (and avoid turning Venusian) through the ...
casualworldbuilder's user avatar
14 votes
5 answers
4k views

Is it possible with modern-day technology to expand an already built bunker further below without the risk of collapsing the entire bunker?

In my fictional setting, albeit close to real world, there is a research facility built on a remote island in a form an underground multi-floor bunker. This bunker does not look like a mine - it is, ...
Valentin Onishchuk's user avatar
5 votes
8 answers
3k views

Why are metal ores dredged from coastal lagoons rather than being extracted directly from the mother lode?

Why are metal ores dredged from coastal lagoons rather than being extracted from the mother lode? I want to arrange a situation where the easiest /cheapest way of obtaining metal ores is by dredging ...
Slarty's user avatar
  • 37.9k
15 votes
13 answers
4k views

What scientifically plausible apocalypse scenario, if any, meets my criteria?

After several of my existing worldbuilding projects hit dead ends, I needed a new setting to work on, so I thought I'd try a post-apocalyptic one. The problem is that I can't decide what kind of ...
Choroflorocarbon's user avatar
2 votes
1 answer
135 views

Collateral damage of a speedster running at full speed

In my story I have a speedster that has the ability to move superhuman speeds. This story is slightly based in science so the superpowers and how they work aren’t explained by science and are just ...
Coolcats112's user avatar
  • 1,130
3 votes
2 answers
870 views

climate control and carbon sequestration via bulk air liquification

When there's a stationary high pressure ridge heat domes can form that increase the air temperature and decrease precipitation. But what if one were to kinda suction the air out of the atmosphere, ...
neubert's user avatar
  • 133
5 votes
7 answers
1k views

How to arrange three identical habitable planets in one solar system in similar or, if possible, same orbit?

Reading these three questions -Can 3 planets rotate around each other like this? -Can multiple similar planets share the same orbit without interfering with each other too much? I gather that we can't ...
EMS's user avatar
  • 337
-1 votes
2 answers
117 views

What industrial footprint is needed to manufacture ample medieval-era work uniforms?

I'm a time traveler from 2024 who has set myself up in the medieval era as a local lord, and I wish to provide cheap, high-quality uniforms for laborers in my lands, namely: unisex tunics, and hooded, ...
Tom's user avatar
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1 vote
0 answers
68 views

I may have made an error in calculating my spin-orbit resonance

I have a very warm planet named Phoenix I'm worldbuilding that's 1.2 times the mass of Earth, with a density somewhat smaller at 5.2 g/cm^3, orbiting at a distance of 0.1 AU from it's star in 10.2 ...
GJC's user avatar
  • 47
1 vote
7 answers
195 views

Could asteroid mining be made viable if there were a resource rich asteroid in orbit just beyond the moon?

Two of the biggest issues with asteroid mining is the issue of actually getting materials from the the asteroid in question back to earth, and the relative abundance of resources on earth vs in space. ...
OT-64 SKOT's user avatar
  • 4,741
0 votes
0 answers
32 views

Effects of Day/Night divide on airflow patterns on a binary planet

I'm currently working on a project with a binary planetary system (both planets are around .8 earth mass with some variation), and naturally, the planets are tidally locked to each other, leading to a ...
Max Bird's user avatar
  • 519
3 votes
5 answers
619 views

Air magic only used to decrease humidity and improve living conditions?

I'm writing a world with an overall warm and very humid climate (Eocene-adjacent, although it does not have to be 100% realistic). Population is very low compared to Earth. Humans generally live in ...
Rinske Verberg's user avatar
-2 votes
1 answer
97 views

'Bulk, high-ish purity carbon' sources in a mostly contemporary-adjacent setting

Basically what it says on the tin. A society mostly like ours as far as it's technological base goes recently discovers a way to synthesise very useful 'crystals' with carbon, with applications in a ...
Archmagos's user avatar
  • 633
3 votes
2 answers
268 views

Is the proposed solar sailing race course possible?

This is an idea that's been banging around a couple of universes in my head for quite some time, the idea is to have solar sail racing yachts that have to traverse an asteroid field. This could be ...
Ash's user avatar
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16 votes
9 answers
2k views

Would this telescope be capable to detect Middle Ages Civilization?

Imagine the aliens of Prettyfaraway had developed deployed the PrettyHuge Space Telescope. This pretty impressive array of gravitational-lensing space faring telescopes was capable of resolving Earth ...
Duncan Drake's user avatar
  • 3,989
3 votes
2 answers
165 views

What evolutionary pressures would lead to clowns? [closed]

In my world, there is a species scientifically named Homo ridiculus (funny human) (so, they are humans, just not Homo sapiens), commonly named clowns. Some basic characteristics of them are: They are ...
mammifereviolet4694's user avatar
1 vote
2 answers
86 views

Can a bird fly if the polar atmosphere is this thin?

Imagine, if you will, a fantasy world so fantastical in regards to physics that one of its telltale signs of disregarding the laws of physics is how atmospheric density is tied to latitude. At zero ...
JohnWDailey's user avatar
  • 14.6k
7 votes
4 answers
2k views

Airtight beaks?

I have a (moderately) hard sci-fi, in which there is a species (the Bethin) who are based on squids. They have the biological equivalent of a space suit for their skin, and use the mantle cavity as an ...
Blue Skin and Glowing Red Eyes's user avatar
4 votes
6 answers
2k views

Plausible reasons for the usage of Flying Ships [closed]

Inspired by this question, I would like to try a similar question, but for flying ships. So, assuming that the technology is readily available and that we could build these flying ships as easily as ...
Fulano's user avatar
  • 293
1 vote
1 answer
125 views

Methods of determining if an AI takeover on a planet has happened? [closed]

So, in my plot a Galactic Inspector incognito visits a planet (series of planets) with the mission to determine if an AI takeover has already happened there. If the planet is controlled by AI, the ...
Anixx's user avatar
  • 5,360
1 vote
1 answer
46 views

What materials are best for creating a solar sail based of scientific factors [duplicate]

What materials are best to use for a solar sail? Since solar sails function through the transference of momentum from photons, a high reflectivity material would be best, no? Are there any scientific ...
holly newman's user avatar
0 votes
1 answer
95 views

Can a species transition to ZW from XY (or vice versa) sex determination system through evolution?

In my world, there is a species descended from green iguanas (Iguana iguana) that has ZW sex chromosomes rather than XY like all other iguanids. In the XY sex determination system (which is used by ...
mammifereviolet4694's user avatar
1 vote
3 answers
119 views

Could a jet powered tail-sitter aircraft compete with standard VTOL designs? [closed]

There have been many designs for tail-sitters1 in the past, but they were mostly scrapped for being really hard to land and take off in. However, today this can be easily mitigated with computers. ...
Bubbles's user avatar
  • 2,105
6 votes
4 answers
2k views

Would a "plug and play" prosthetic be possible?

A plug and play prosthetic is a type of prosthetic that does not require months of rehabilitation just to use, rather, this type of prosthetic can be used immediately after it is surgically installed, ...
Marcowarrio's user avatar
7 votes
1 answer
77 views

Weather on a Hot Saturn

So, out of curiosity and for the purposes of a roleplay universe I am making, I am curious about the weather on a Hot Saturn. This planet, nearly identical in mass, composition and size to Saturn, is ...
Danvad's user avatar
  • 413
7 votes
2 answers
176 views

Could an azhdarchid pterosaur take off and fly while being ridden by a human?

Could humans theoretically ride any of the largest azhdarchid pterosaurs, assuuming a wingspan of about 10.5m and weight of about 200-250kg for the largest azhdarchids such as Hatzegopteryz or ...
rhobot's user avatar
  • 73
2 votes
3 answers
374 views

What are the potential advantages/disadvantages of a hyper maneuverable aircraft that operates similar to Armored Core's mechs?

I'm attempting to writing in a near-future war setting where some new weapon designs are being tested, in an attempt to breakthrough the enemies military strategies by "thinking out of the box&...
Fulano's user avatar
  • 293
9 votes
1 answer
711 views

How do you tell if you're in a nebula?

Specifically, how does a civilization tell if their home planet - on which they have always resided - is orbiting a star that is inside a nebula? The way we know that we're not in a nebula is because ...
controlgroup's user avatar
  • 5,415
15 votes
5 answers
2k views

Would an industrial level society be able to visually identify orbital debris from a destroyed mega structure?

My world is a very distant post apocalyptic society on earth after the destruction of some orbital mega structure around the planet - like an orbital ring or something. The current civilization(s) on ...
DisasterButton's user avatar
13 votes
10 answers
4k views

How much time is needed to judge an Earth-like planet to be safe?

A colony ship has been sent to deep space to colonize an earth-like planet. Through astronomical spectroscopy, the atmospheric composition was found to be suitable for human life. But of course, ...
user73910's user avatar
  • 953
13 votes
13 answers
5k views

Could an Alien decipher human languages using only comms traffic?

Could a hiding alien ship decipher all of our languages only using the comms traffic of our civilization without our cooperation(assuming our civilization has expanded across the solar system, to the ...
Bubbles's user avatar
  • 2,105
1 vote
3 answers
135 views

Could saltpeter be discovered from fertilizer?

One day, while going down a black-powder rabbit hole, I stumbled upon the neat historical fact that, in various times and places in the early modern period, urine was used as the source of saltpeter ...
RHF's user avatar
  • 557
3 votes
1 answer
95 views

How would a planet with both global and hemispherical seasons work?

Long ago, I asked a question on how to make Earth's oceans brackish based on Chris Wayans's super-Earth, Lyr. Now we're going back to it because it has another interesting detail which results in ...
JohnWDailey's user avatar
  • 14.6k
5 votes
2 answers
306 views

If an otherwise too massive planet rotates fast enough, would the equatorial region become habitable?

Ok, So I'm writing with an eye toward pondering the constraints of terraforming, which are more numerous than most people think, which creates a plethora of fun quirks and constraints for story ...
E. B. Kinder's user avatar
3 votes
4 answers
273 views

Producing A Chosen One Via Eugenics: Is It Possible?

Also Known As: The Ambrosius Problem Lore if wanted: Long ago, the 12 most powerful mages in the world (the Founders), after gaining a pyrrhic victory against the Eldritch King, performed a ritual to ...
Alendyias's user avatar
  • 13.6k
6 votes
3 answers
165 views

Storm-Powered Industrial Revolution Complications/Limitations

Poseidon and Zeus are not very happy. An alien planet hosts a very stormy and volatile hydrosphere. It's of a similar temperature to Earth, except larger, with a bit more gravity, and tidal heating ...
Rexotec's user avatar
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