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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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6 votes
3 answers
392 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
12 votes
10 answers
3k 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
  • 943
13 votes
12 answers
4k 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
  • 1,666
-1 votes
2 answers
80 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
  • 197
3 votes
1 answer
85 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
  • 14.5k
1 vote
0 answers
166 views

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

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
263 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
-5 votes
1 answer
100 views

Why can’t we export everything needed to heat mars up from earth. So why not use the things that are heating earth right now on mars. We have enough [closed]

If we want to warm up mars, exportion is the solution. Cows, produce about 200-500 methane. burning fossil fuels total about 34 billion tonnes of carbon per year. About 45% of this is from coal, about ...
matt tune's user avatar
6 votes
3 answers
153 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
  • 735
1 vote
3 answers
108 views

Dwarves as silicon life forms [closed]

So, I'm continuing to work on my sci-fi setting based on classic fantasy. Now I'm thinking about dwarves, and if earlier I took as a basis the classical idea of certain races and searched for a ...
Alexander Herman's user avatar
3 votes
2 answers
421 views

Planet for elves [closed]

I continue to write a setting in which fantasy races have a scientific basis within a setting close to science fiction. Today I would like to touch on the topic of elves and create a planet where such ...
Alexander Herman's user avatar
5 votes
3 answers
959 views

Planet for orcs [closed]

So, I'm working on my own setting. It is close to the classic fantasy, so it has a similar set of races. But this setting is mostly science fiction, so the races present in it must have a logical and ...
Alexander Herman's user avatar
11 votes
4 answers
4k views

Can this flying island survive a 15kt nuke? (and if yes, how much more can it take?)

So there's a flying island about 500 to 600 metres in diameter and roughly 300 metres in height in it's highest point. It is mostly basalt and other volcanic rocks, with a layer of dirt on top. The ...
Kugelblitz's user avatar
10 votes
5 answers
5k views

How big can a chicken get?

I'm working on a Spec Evo project and I'm wondering if there's a possibility for domesticated chickens, the closest living relative to the T-Rex, to regain those massive sizes. How did these chickens ...
TheGoldenBoy2188 The Coolest G's user avatar
6 votes
4 answers
204 views

What is the best kind of nuclear reactor to use for a criticality accident if I want to expose my crew to a huge amount of radiation?

I've recently been making an attempt to write a short story that leans very heavily towards hard sci-fi. My area of expertise is primarily in biology and neurology, and the backbone of the story is ...
the-protean's user avatar
8 votes
5 answers
3k views

How much of an advantage is it to have high acceleration in space combat

I was thinking, How much of an advantage is it to have engines capable of very high acceleration in space combat with an opponent who cannot accelerate so quickly? Specifically, if you have a ...
Bubbles's user avatar
  • 1,666
7 votes
5 answers
2k views

Could a 200m diameter asteroid be put into a graveyard orbit and not be noticed by people on the ground?

So, there’s a secret space station—code named Anvil—that is run by a secret military organization that was formed to provide a rapid response team against national/global threats. They launched a ...
Blue Skin and Glowing Red Eyes's user avatar
6 votes
2 answers
2k views

Effects if a human was shot by a femtosecond laser

Laser guns in science fiction are extremely common to the point of being a common cliche. According to atomic rockets lasers would be much more effective as pulsed lasers compared to continous-wave ...
Coolcats112's user avatar
  • 1,050
12 votes
4 answers
3k views

How long would today's books last in a post-apocalyptic setting?

In my setting, the modern world ended catastrophically 500-ish years ago in-setting, which would be about 2150 as the event date. So the "present" is 2650 ish. Judging by the research I've ...
Chromatic Realms's user avatar
8 votes
11 answers
5k views

Someone just nuked your very expensive ship. What is keeping your ship intact?

So, in my setting, the (space) warships can get pretty big and tough. Some of the big ones can take hundreds of hits and still keep going. However, the problem I've run into is Nukes. Even if your ...
Bubbles's user avatar
  • 1,666
2 votes
2 answers
121 views

Lagrange Points regarding a moon 1.5 times the mass of Earth's Moon and one 0.75 times the mass of Earth's Moon

Working on a lunar orbit system. As place holder numbers, two moons are orbiting a planet equal to earth's mass. One moon, Selenara, is 1.5 times the mass of Earth's moon, and the other, Thoth, is .75 ...
Danvad's user avatar
  • 29
0 votes
1 answer
77 views

Lichtenberg figures [closed]

I am writing a story in which a character is wearing an insulated suit (rubber) to protect himself from being severely injured or killed by electrocution, but it will not fully protect him from a very ...
SciFiNinja's user avatar
12 votes
6 answers
2k views

Can anyone win a "game" of Rocket Tag on an interstellar level against a prepared opponent?

Relativistic Kinetic Kill Vehicles (RKKVs) are all but undetectable until it's far too late to do anything about them; they have a very low radiation profile once at cruising velocity, their exhaust ...
Ash's user avatar
  • 45.6k
1 vote
2 answers
249 views

Looking to shape a magic system based as much as possible in actual science [closed]

I am looking to create a magic system that is grounded in science. My initial thought was the ability to manipulate electrons on the atomic level. Since I do not want the magic users to be walking ...
Chason Arthur's user avatar
4 votes
4 answers
649 views

Possible binding agent for Chlorine in blood?

It is as the title says, is there any good agent for binding to chlorine in blood, for fauna that respirate such a thing. Like iron bonds to oxygen in our own blood, in order to transport it? I tried ...
DanceroftheStars's user avatar
3 votes
3 answers
250 views

How many miles/km of tunnels would be required to replace all airports in the world

Assume that we wanted to replace all air travel with underground, high speed tunnels like Hyperloop. How many miles/km of tunnels would be required? For example, according to wikipedia there are 1200 ...
Ed Tate's user avatar
  • 131
4 votes
1 answer
90 views

Could chromatophores function suspended in fluid?

just wondering if there's any way chromatophores could function while suspended in fluid (maybe something similar to hemolymph?) I'm basing this off of mollusk chromatophores in particular, which as ...
fyshsticks's user avatar
3 votes
2 answers
149 views

Evolution of classic giant mushroom forests [closed]

How would the classic fantasy trope of giant mushroom forests evolve? In an alternate, Earth-like reality, how would fungi grow into dense, lush 'forests'? Mushrooms decompose things, so to have ...
Aster's user avatar
  • 341
0 votes
0 answers
37 views

Can the hemoglobin be fed something besides iron to make blood a different color? [duplicate]

A bit of context here. A species of Fairies in my world have silver-colored blood, and while researching for that, I learned that hemoglobins essentially require blood to be red because they need iron ...
Nightmare's user avatar
  • 163
2 votes
0 answers
25 views

Why are the flux limits larger for low-temperature stars? [migrated]

When calculating the habitable zone of a star, the minimum and maximum stellar flux limits compared to Earth seem to be larger for stars with lower temperatures. Why is that?
Sussus Amogus's user avatar
3 votes
4 answers
173 views

How would geometric leaves and flower petals evolve?

How would a plant grow leaves and flowers that are square and/or geometrically shaped? Outside of being restricted by external forces like growing in a tight space, how could my plant species grow ...
Aster's user avatar
  • 341
5 votes
6 answers
195 views

Can an amphibian grow fur?

Can an amphibian, such as an axolotl, grow otter-like fur? This fur would need to be hydrophobic and hydrodynamic to enable streamlined movement through the water. Additionally, it would trap heat -- ...
Aster's user avatar
  • 341
0 votes
0 answers
47 views

How do I find the correct planetary spacing for my red dwarf system?

I have a system with a K6.7V star at 0.585 M☉. The planetary system has 7 orbits -- A tiny, rocky planet at 0.043 AU with a mass of 0.0465 M⊕. A tidally locked, habitable, water world planet at 0.34 ...
Aster's user avatar
  • 341
11 votes
6 answers
2k views

What species would make good flying livestock?

Domesticated magpies will carefully watch over these flying livestock like smarter, louder, sheepdogs, driving away would be predators (along with the help of a much smaller number of domesticated ...
Vakus Drake's user avatar
  • 2,803
8 votes
6 answers
2k views

Negative pressure projectile propellants (Alternatives to gunpowder)

While I was looking into alternatives to gunpowder I stumbled onto a comment talking about an ignited chemical propellant that could be placed in front of a bullet and effectively suck it forwards out ...
Wey Newman's user avatar
2 votes
1 answer
74 views

UV radiation from conventional blasts? [closed]

Continuing from this question Blast will produce shockwaves at a close distance, so earplugs are a given. But what about the UV glasses? Temperatures exceeding 2500K are required to produce UV ...
EMS's user avatar
  • 287
-5 votes
4 answers
159 views

Is wood porous? [closed]

Steps to make a bomb in a fantasy world. Take a piece of wood. Wood is porous. Saturate these pores with oxygen. Saturate the wood itself with Pyro Mana(Mana that provides heat when released). ...
EMS's user avatar
  • 287
-4 votes
3 answers
585 views

A lightning bolt strikes the White House. How much power would it require so that its exuded energy can ignite the entire landmass of the USA? [closed]

I have a Lightning Deity in the Gulf of Mexico that wants to intimidate modern Earth and decides to throw a lightning bolt at the White House. As the lightning strikes the White House, the heat, light,...
Dmyt's user avatar
  • 369
5 votes
11 answers
6k views

Fully electric flamethrower

Flamethrower and other incendiary weapons often use several liters of fuel and due to this they are easy targets and dead weight in an army. Additionally flamethrowers that use fuel have limited uses. ...
Coolcats112's user avatar
  • 1,050
6 votes
5 answers
2k views

Evolution of predatory elves

One concept I've toying with for a while is the idea that elves are a species of Homo that have adapted to a more predatory life style. With the idea that their agility and strength is derived from ...
Seraphim's user avatar
  • 4,971
3 votes
1 answer
77 views

Water distribution on tidally locked planet with small northern ocean

Possible repeat of this, but the northern ocean wasn't really addressed. Picture a mars-like planet, with a rocky, mountainous southern hemisphere, and a flatter, low-elevation northern hemisphere. ...
planetQuestioner's user avatar
8 votes
8 answers
4k views

If the Earth stopped spinning, what's the ideal point for it to stop to ensure the most people survive?

Say the Earth were to stop spinning, and became tidally locked (or rather, stop spinning 366.25 times a year, and only once a year), through the machinations of a superpowered alien visiting down on ...
iolim5678's user avatar
  • 175
2 votes
1 answer
82 views

Practicallity Check of Floating Fish Enclosure

Introduction I would like to start off by saying these are normal fish. The fish are just fish. The fish are not genetically engineered with the exception of say a GloTetra. The fish can be fresh or ...
Idan's user avatar
  • 673
21 votes
7 answers
4k views

Could you actually do orbital deployment?

At this point the idea of soldiers, equipment, weapons, etc. being deployed straight from close orbit is fairly popular (for some reason). The idea is pretty much that you have a ship in orbit in the ...
controlgroup's user avatar
  • 5,038
1 vote
3 answers
199 views

How can decades-long ageless sleep work without either warping time or allowing biological immortality?

I am working on a setting with interstellar travel but no faster-than-light travel; since generation ships require almost perfect recycling technology and are unlikely to be socially and culturally ...
Choroflorocarbon's user avatar
5 votes
2 answers
164 views

How would be a Lunisolar Calendar with 2 Moons?

The world I'm building it's a Super-Earth named Tempus, and it has 2 moons in an orbital resonance. One of the moons, named Tidra Moon, is closest to the planet and basically has the same influence on ...
JahJahs's user avatar
  • 71
-2 votes
1 answer
99 views

Maximizing the wind speed of an ionic thruster in atmosphere [closed]

In real life ion thrusters in atmosphere have extremely low thrust with thrusts of 290 millinewtons. This is detrimental to real life ion drives in atmosphere. This problem got me thinking about how ...
Coolcats112's user avatar
  • 1,050
3 votes
1 answer
894 views

What would be the color of this ammonia ocean?

The ocean in question is mostly made ammonia, with some traces of ices (mostly water ice) at the bottom of the ocean. It also does have dissolved alcohols and salts though but these can be ignored if ...
Neil Iyer's user avatar
  • 1,543
10 votes
8 answers
3k views

What animal would make the best centaur

Imagine a centaur. Humanoid torso attached to where the neck should be on, say, a horse. Is this the best/most realistic animal to use? Would an "anatomically correct" centaur be more ...
Talbot's user avatar
  • 709
5 votes
3 answers
771 views

How do these trees not collapse? [closed]

I'm currently building a planet, an ammonia world with an average temperature of 225ºK and has a mass of 2 earth masses and a radius of 1.25 earth radii. The average pressure at sea level is 4 ...
Neil Iyer's user avatar
  • 1,543

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