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 votes
3 answers
54 views

Disease that rapidly kills and replaces cells - severity of symptoms

I have conceptualized a disease that rapidly kills cells in the human body and replaces them with modified copies over a period of 7-10 days. After this time, every cell in the infected person's body ...
2 votes
9 answers
2k views

Ambiguous death vs perfect scanner

I would like for there to be some ambiguity in a character's death in a story I'm writing. Unfortunately, she lives in a universe with 3D scanners that can map out her corpse's molecular density and ...
4 votes
2 answers
560 views

30 g kick to an entire planet, but only for extremely short duration [re-scoped]

I plan to subject an entire earth-like planet to about 300m/s^s acceleration, what is the shortest duration I can get away with for non-scientists to realize something has happened, without everyone’s ...
0 votes
2 answers
171 views
+500

How much resources would be needed to make significant damage with a chemical laser?

Context: It is the future and some sci-fi technologies are starting to be used, such as lasers. More specifically, chemical lasers. The thing is that I want to know about nowadays technologies in ...
12 votes
13 answers
5k views

What would be the least physics breaking way to travel at light speed or faster?

Essentially, by bending a few rules of physics and other sciences with as little handwavium and unobtainium used, could there be a way to travel several parsec and/or lightyears in a (relatively) ...
-3 votes
2 answers
48 views

More massive moon from asteroids [closed]

If mass were added to the moon sourced from tailings from asteroid mining or asteroids brought to the moon for that purpose in order to increase the moon's gravity to a comfortable level for humans, ...
2 votes
2 answers
107 views

Can an organism have body structure materials that crumble upon being injured?

I'm working on building a species of wild animal, and I have several criteria in mind, and I'm looking for any glaring issues I may have missed that makes such a creature entirely infeasible ...
8 votes
6 answers
3k views

Would a solar system with four earths directly opposite to each other have different flora?

This solar system contains four earths. These earths, however, are opposite from each other in relation to the sun and their moons are vastly different. Say the moons and earths produce the same ...
2 votes
2 answers
97 views

Could human-powered aircraft be practical on a low gravity world?

On a world with a third of Earth’s surface gravity, with an atmosphere with the same pressure, makeup, and temperature as Earth’s, could pedal powered aircraft be a viable and easy method of ...
-2 votes
1 answer
71 views

What is the color of flora on a superhabitable archipelago planet? [duplicate]

I learned that is theorized that a planet can be "superhabitable" if it has a size that is roughly twice that of Earth, the slightly higher gravity would mean a denser atmosphere with more ...
11 votes
6 answers
2k views

What are the maximum and minimum day-night cycle lengths humans can adapt to?

On habitable planets, rotational period can be assumed to vary significantly. What are the limits of human adaptation to these different conditions while maintaining a normal sleep schedule? The ...
7 votes
5 answers
419 views

Galactic 'geographic' features, how could they impact galactic colonization efforts?

I have been wondering how galactic features could impact interstellar civilizations in the process of colonizing a galaxy (either andromeda or the milky way). According to this video these features, ...
8 votes
8 answers
2k views

Idea for a more "efficient" brain?

So if my incredibly basic understanding of how brains across animal species work is that the brain is compartmentalised into a bunch of different sectors that handle things like sight, language, fight ...
6 votes
5 answers
377 views

Evolved insect eyes

In one question I asked how insects can evolve their base biology to grow in size here. Which was followed up by this question about how well the antennae would fare when increased in size here ...
0 votes
0 answers
65 views

What are hard sci-fi mechanisms for a society of sentient planets? [closed]

IN BRIEF: I'm wondering if anyone has any hard mechanisms/explanations in mind for a planet-sized single consciousness that's able to move itself freely in space while developing its own distinct ...
3 votes
2 answers
170 views

Evolutionary narrative for brains that evolve abstract thought alongside bodily function control

Premise Typically, we might view the evolution of the brain as a linear progression: with its primitive reptilian brain stem as the origin and the lofty neocortex as the pinnacle. However, I'm aiming ...
1 vote
1 answer
243 views

Hypothetical animal material part 1 [closed]

My animal was in another world . It had bones, teeth made of tungsten. It lives in shallow environment. What would the bite force of my tungsten reinforced animal teeth ( assuming it is plausible)?
4 votes
4 answers
775 views

Why would some species from the Homo genus be much more likely to be autistic than Homo sapiens?

In my world, there are three species from the Homo genus that make together a clade called "aquatic humans": merfolk (Homo maritimus) (their scientific name means "marine human"), ...
2 votes
2 answers
111 views

Is it possble to modify the whole population by introducing a small modified sample into the genepool?

I found a paper on genetical modification of mosquitos disrupting malaria. There is an intresting excerpt conserning proliferation of a desired gene into whole population: All gametes arising from ...
2 votes
4 answers
132 views

How to remove or greatly reduce the effects of menopause?

The reason menopause lead to hot flashes, vagina atrophy, osteoporosis, lose of muscle strength, brain fog, great memory and concentration loss, ect. Is because estrogen production is greatly ...
6 votes
1 answer
159 views

How can we maximize the speed of a bipedal digitigrade humanoid?

How fast can a digitigrade bipedal ape possibly run? I've raked through any question I could find on here talking about speedy bipeds or digitigrade bipeds (that aren't robotic/synthetic), but none ...
3 votes
2 answers
98 views

What would the rest of the oceans look like in this scenario?

The scenario being this: The red band extending 15 degrees from the equator is a dead zone, too hot for complex, multicellular life to thrive. How hot are we talking? The equator in this scenario ...
5 votes
1 answer
123 views

Alpha Centauri/Binary Star Planet Orbits

One of the physical constraints to planetary systems around Alpha Centauri A and B that many papers have pointed out is that the planets would need to orbit in the plane of the A-B Orbit, not the ...
4 votes
2 answers
76 views

Day/night cycle and tracking celestial positions in S-type binary star system

I know this has been asked before but I'm going to pose the question again under slightly different circumstances and with a more specific goal. I'm trying to work out the details of how the day/night ...
5 votes
1 answer
118 views

Acetylene and Methane biology questions

First time poster, please be gentle. Long story short, my own alien worldbuilding/speculative biology project involves the idea that cyanobacteria and other oxygen producers never evolved and other ...
3 votes
3 answers
755 views

Weather and climate of tidally locked, inhabited moon with oceans

This follows another question that brought me some curiousity about the general state of an earth-like moon tidally locked to a gas giant planet. There's been questions about a world tidally locked ...
19 votes
6 answers
6k views

Cold-blooded intelligent race: Is it possible?

I need my race to be highly affected by climate and nature changes. And they are more like a reptile - Humanoid. So making them Cold blood seems good for me. But they are an intelligent race too. They ...
0 votes
3 answers
196 views

Would an air burst nuclear weapon make a crater? [closed]

In specific it would be a 300kt warhead detonated around 3000ft above the ground.
26 votes
7 answers
9k views

24 hours to evacuate all of Florida. How many make it?

The year is 203X, and a small-ish asteroid is detected just 24 hours before it hits the atmosphere above central Florida. The kinetic energy is estimated to be "a few" exajoules (1 exajoule ...
2 votes
4 answers
256 views

A.I. can make Video, Photographs, and Audio perfectly out of text prompt. How screwed is our legal system? [closed]

In the near-future (circa 2030), publicly available open-source A.I. can create any Picture, moving picture, or audio track imaginable from a text prompt. It takes a lot of computing resources (but ...
-2 votes
1 answer
129 views

What are the Ground Effects of the South Atlantic Anomaly [closed]

My story takes place with hikers high in the mountains of South America. Today I learned about the South Atlantic Anomaly. https://en.m.wikipedia.org/wiki/South_Atlantic_Anomaly This region, which ...
3 votes
1 answer
161 views

What is the altitude limit at which plants can grow on a low gravity planet?

(My Universe Sandbox Almost Terraformed Mars) How high can plants grow on a low gravity planet like Mars? Since lower gravity planets tend to have a greater height differences in terms of geography ...
5 votes
2 answers
122 views

Superactinide Incorporating Biochemistry

Alright so as it is known, trans-uranic elements are universally unstable. However, in this setting, I'm using forms of quark matter that can imitate the nucleus of transuranic elements at least mass ...
1 vote
2 answers
118 views

How do I stop blood from clotting except upon exposure to the atmosphere? [closed]

Blood clots in order to stop bleeding. The problem is that sometimes it clots when it's not supposed to. This is called thrombosis. It kills a lots of people each year. I want this to stop happening. ...
2 votes
2 answers
110 views

Electric Arc Discharge Plasma and other forms of Plasma tech as a weapon

I'm making a weapon for my character which looks like a sword or is used as such but is segmented to give it whip like flexibility (restricted movement for safety) when needed. Each segment has metal ...
10 votes
5 answers
340 views

What would the climate of this habitable world be like?

Somewhere, far away in the universe, there is a galaxy that has not been made by nature. Whatever kind of hyperadvanced civilization could have created such a titanic project, and for whatever ...
6 votes
2 answers
269 views

How would the laws of physics need to be adjusted if there really were a preferred frame of reference for FTL?

I am considering how to implement faster-than-light (FTL) travel in a sci-fi setting without the attendant problems with causality. One of the ways I've been thinking about for this is establishing a ...
1 vote
3 answers
142 views

On a Tidally-Locked Toroidal Planet

I am developing a world, and I need to see what exactly the surface would be like. It is tidally locked at 1AU away from the parent star. It is tidally-locked via being a Torus with a major radius of ...
3 votes
1 answer
82 views

Length of seasons on a planet with eliptical orbit

In my sci-fi story, I have a binary star system with two Sun-like stars orbiting each other in nearly circular orbits. The separation allows them to have planets in stable orbits, and their habitable ...
10 votes
3 answers
416 views

Planet with natural process(es) that results in cube-shaped mountains

Premise The task is to explain how a planet can possess cube-shaped mountain ranges and maintain them across geological time scales. I have tossed around several ideas, such as creating a vacuum ...
3 votes
3 answers
180 views

A potential way to use "space mines" to guard a moon or small planet

Space mines have a glaring problem which is the fact that space is really big, But I have devised a space mine which could be used to defend a moon or small planet. My space mine would be Casaba-...
3 votes
1 answer
135 views

Can I put a Biological Refrigerator inside an organism and use it to create a sub zero spray?

Create a hypothetical creature. It has the basic components of a refrigerator inside it. It uses this internal fridge to create liquid atmosphere which it can spray. For condenser coils it has some ...
5 votes
5 answers
3k views

If you could set the temperature of one marble to any number of degrees without limit, would heating it enough ignite the atmosphere? [closed]

Or would the small size of the marble prevent the heat from spreading?
3 votes
2 answers
669 views

How thin theoretically would a cut (with energy or matter) need to be to not be perceived by the human nerves/brain?

In this specific setting, it would be a speculative sci-fi thing, but this matter in specific isn't central to the plot. The idea is that the time that it takes for a person to recover from a ...
4 votes
1 answer
120 views

Giant realistic Prototaxites like fungi in a hot climate

My planet is very similar to earth around 359 to 299 million years ago. years ago. It’s mostly covered in deserts, jungles, swamps, temperate forests, and their variants. (The Carboniferous period) ...
0 votes
1 answer
55 views

Would the sort of tectonic activity described below shorten Earth's lifespan?

The unfortunate truth is that hundreds of millions of years in the future, Earth will have used up all of its radioactive materials. And when that happens, tectonic activity will stop and magma will ...
12 votes
6 answers
2k views

How can I make an earthlike planet windier?

Imagine a planet like earth, but windier. Not pick-up-a-house-and-drop-it-on-a-witch windy; let's say just give-trees-a-hard-time windy. I'd like "high winds" (defined by the United States ...
3 votes
1 answer
63 views

Would these changes alter the effects of Tornado Alley?

Here is how the meteorological danger zone called "Tornado Alley" is made: Warm, moist air from the Gulf of Mexico mixes with cold, dry air from the mountains and warm, dry air from the ...
9 votes
8 answers
2k views

Would it be possible to have 3 planets that could be colonised by humans in the same system?

I’m looking to create a situation where there are 3 habitable planets (or moons) in the same system, each with different inhospitable but habitable (by genetically modified humans or humans using ...
2 votes
3 answers
191 views

Would it make sense for an Interstellar government to use the half life of common radioactive elements as a measure of time? and to make calendars? [closed]

For example, can we use the half life of Polonium or Uranium to measure time and produce something similar to a calendar?

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