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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.

7
votes
3answers
152 views

Genetic exchange between animal and plant, Elves love trees

This question has its origins in the word "dendraphile" used in a YouTube comment. It was used in an insult used by dwarves towards elves. My chain of thought then was that the dwarves would use ...
3
votes
2answers
145 views

Would an deep sea lava river be feasible?

I don't wanna reveal too much about my world, however, the basic idea is that there is a town of people who live deep underwater (they are biologically capable of doing underwater gas exchange and ...
7
votes
2answers
325 views

How do I give my planet a stronger magnetic field? Playing with variables

Let's say I have a terrestrial planet superficially like earth, except that it rotates much slower (about 10-15 days per rotation) and its atmosphere is ideally several times thicker. If I want this ...
28
votes
17answers
5k views

What food production methods would allow a metropolis like New York to become self sufficient

In my overcrowded future setting the Hegemony (government of the Earth) wants to make the metropolises of the world self sufficient when it comes to food production. What farming/food production ...
6
votes
4answers
1k views

How can a demonic viral infection spread throughout the body without being noticed?

Demonic possession occurs when an evil spirit hijacks the biological system of an organism, corrupting it and taking control of its functions. Although powerful, the possession eventually breaks down ...
7
votes
6answers
296 views

Can there be substantial darkness?

OK, OK, I know, darkness is nothing but absence of light, so there can be no substantial darkness. Darkness, on its own, doesn't exist. But, can we not get pretty close to this? Can there be ...
2
votes
2answers
121 views

Could bio-luminescent plants survive in total darkness for ~3 months annually?

If a three-month dark period was a normal, recurring, part of a 15-month calendar, and plants had evolved to be bio-luminescent, could they survive? Would only some survive and, if so, would it be ...
34
votes
16answers
8k views

Best species to breed to intelligence

I’ve included more background below, but the TL;DR is that you’re a lone immortal who’s decided to breed some species of animal to a human-level intelligence (over the course of hundreds of thousands ...
5
votes
4answers
248 views

Could a Stanford torus rotate on an additional axis to give it a diurnal cycle?

Suppose you have a regular old Stanford torus space station with a 'glass ceiling' rotating at 1.3 RPM. Put it in orbit around a star such that its axis of rotation intersects the star (in other words,...
11
votes
3answers
1k views

Would the rotation of the starfield from a ring station be too disorienting?

The Coriolis effect on a ring-shaped space station gets the most attention, but disregarding that, would the rotation of the starfield be too disorienting? A 1km radius station at 1G simulated ...
15
votes
5answers
3k views

How could a civilization detect tachyons?

In an effort to work out a believable form of faster-than-light communications for my setting, I've ruled out a few things: wormholes (which are in use, but are too random in where they lead, to be ...
11
votes
7answers
1k views

How could a humanoid creature completely form within the span of 24 hours? [closed]

I have a strange idea, I want to reality-check. But first, there's a thing to elaborate on. So, there are these undead creatures, zombies, skeletons, Michael Jackson, who appear in large numbers ...
1
vote
1answer
65 views

Life in Jupiter-like conditions? [duplicate]

In a neighboring star system to my Conworld, there is a jupiter-sized planet that many of the species believe to harbor life. The star it is orbiting is a red dwarf, and the aforementioned "Re-Jove" ...
1
vote
2answers
107 views

When were computer components 0,2 micrometer in size? [closed]

When setting a story in the future I always try to limit the technology available. It's less enjoyable and harder to identify yourself with droney the drone than with John and Jane Doe. Currently I ...
3
votes
1answer
75 views

Physically based explanation for glowing geometric shapes found embedded in a city, visible only in IR [closed]

I'm looking for an explanation for the presence of large geometric luminescent formations that are found to be embedded in the infrastructure of a city. They must be esentially undetectable to the ...
7
votes
2answers
155 views

How to calculate rate of axial precession?

I want to start with the fact that I am by no means an astronomer, or even a hobbyist in the field. I am attempting to build a fantasy world which still reflects accepted physical laws. My problem ...
1
vote
1answer
137 views

What accommodations would a giant need?

I'm making a human female who's size was multiplied by 10. I need to know what sort of accommodations she'd need to make up for any disadvantages. This is in the modern day, so 21st-century medicine ...
6
votes
1answer
101 views

Could a passive radar-sighted creature see by space radio emissions?

I am working on a world which is very dark due to an opaque gas layer in the hight atmosphere; but it is opaque mostly in the terahertz range. The creatures in this world therefore rely very little on ...
3
votes
1answer
76 views

How long to recover from muscle atrophy?

For context, I'm currently working on a short story series centered on a young man living in a dystopian America. This U.S. government keeps its 'undesirables' in medically-induced comas (long story ...
3
votes
4answers
473 views

Feasibility of lava beings?

Could a creature be made entirely, or mostly of magma or lava? Could it sustainably live in or near a volcano for an extended period of time? Rocks around the outside are optional, and encouraged. If ...
1
vote
1answer
158 views

What is the largest I can make my water planet, while remaining within Earth-like parameters?

What is the largest planet I can get, while still remaining within Earth-like parameters? My concern is with gravity, water pressure and atmospheric pressure. Escape velocity is less of a concern. ...
4
votes
1answer
130 views

What sort of atmosphere would develop around an asteroid colony?

In the not too distant future, mankind has established several mining bases on Ceres. There are a lot of spaceships which come and go. Large mining machines are chewing up the interior for resources. ...
9
votes
4answers
384 views

No oceans but not deserts?

I'm picturing a world without oceans. I'm not after Arrakis; I want a quite lush surface. I'd like no surface water at all, but I'm concerned that makes evolution impossible. (I imagined using ...
4
votes
2answers
189 views

Snow on a low-gravity, high-pressure world

Disclaimer: I am not a meteorologist. Snow forms when supercooled water droplets nucleate onto particles in the atmosphere. After forming, they grow further by both tumbling around within the cloud ...
4
votes
5answers
231 views

What is the cheapest way to move large amounts of trade goods to orbit?

Given a world with similar size and atmospheric composition to Earth that has a commodity export, be it grain or oil etc, that has trade with other planets, what would be best way to orbit massive ...
6
votes
1answer
303 views

Could lakes of mercury exist on an Earth-like planet?

I am working on a planet that has insignificant (almost 0 degrees) tilt, no moon, rotates twice as fast as Earth. I intend to create quite an exotic "biome", so to speak, in a subtropical desert zone ...
3
votes
3answers
336 views

Could a person replace half of their body with gold and still live? What technology would be needed in order to be successful?

My character is male and eighteen years of age. He has no health issues. 'Gold' can be replaced with any type of metal - silver, bronze, steel, iron, it doesn't really matter to me. The ideal type ...
8
votes
1answer
93 views

Rib size to body size conversion

In lots of barren, deserted or otherwise destroyed landscapes, there are bones of long dead animals to be found. Sometimes, it's a skull, sometimes, these are rib-cages, or ribs alone. And ...
3
votes
5answers
354 views

What farming practices would allow the Earth to support a population as high as 200 billion

Welcome to the year 2170, the predictions of our grandparents were so wrong: The human population didn't cap at 20 billion, it went far past that. The global population is now roughly 200 billion. ...
2
votes
1answer
90 views

Seasons & days with steep axial tilt?

Given tilt of about 90deg (like Uranus), with day & year like Venus (day longer than year), orbiting a purple (brown) dwarf (not tidal locked). I'm having trouble getting "seasons" & day ...
2
votes
1answer
106 views

Quaternionic electro-magnetism, world that it can exist in, and the appropriate equation system [closed]

The thing could not exist in real world; it is imaginary concept, expressed in a equations in a paper, that could run as a simulation on a PC. That could be interesting for people with some ...
2
votes
4answers
199 views

Would a person be able to punch a truck away, if his ability was to subvert “Newton's 3rd Law of Motion”?

I'm struggling with the physics here a bit since I'm a complete novice at this. I'm making a character who's main ability is to subvert/play around with the 3rd Law of motion (For every action, there'...
1
vote
3answers
124 views

How would a person be able to attain superspeed if they could subvert Newton's 2nd Law of Motion?

I'm struggling with the physics here a bit since I'm a complete novice at this. I'm making a character whose main ability is to subvert/play around with the 2nd Law of motion. Somehow I understand ...
25
votes
9answers
7k views

I need a disease [duplicate]

I am struggling to find a disease/medical condition for my character. My character is 16-year-old female with a younger sister that doesn't have the disease. If you could please help, here is the ...
2
votes
0answers
100 views

Planet builder? [closed]

I've got questions I haven't been able to get a grip on for two different planets. One has its axis at about 90deg (like Uranus), with day & year like Venus (day longer than year), orbiting a ...
5
votes
2answers
207 views

Is it possible for a space city to exist in and draw power from a nebula? Any side effects?

For context, this takes place about 300 years in the future. The space city in question is located in a nebula, completely man-made (not build upon any preexisting foundations like an asteroid etc.), ...
48
votes
13answers
10k views

Pressure inside an infinite ocean?

Handwaving the origin of one such place, imagine a universe where every part of space is filled fully and evenly with liquid water (at, say 1 degree Celsius). What would be the experience of a solid ...
1
vote
0answers
57 views

How might teleportation to or from a place far from a teleportation device work? [closed]

In many science fiction television shows, and movies characters are teleported from the space ship to a planet, and vice verse, even though the planet has no teleportation device on it's surface, and ...
16
votes
9answers
3k views

What does air vanishing on contact sound like?

I'm about to break rule seven of superpowers: don't think too hard about what it does to the air. A superhero has the ability to disappear any atoms that come within 2 cm of their skin (atoms that ...
4
votes
1answer
113 views

Would life be possible on a planet that has an axis of rotation that always “pointed” directly at the sun? [duplicate]

Preface: I'll be calling call the orbit described in the question title a "solar-oriented orbit" for the sake of convenience, as "a planet that has an axis of rotation that always pointed directly at ...
5
votes
4answers
615 views

Killing undead fish underwater

To kill zombies on land, you usually have to either chop their head off, burn them down or use purification magic (if it is a fantasy world). But underwater you can't kill the zombies the same way as ...
2
votes
4answers
180 views

Which Modern Mammals Would Die Out in an Alternate Extinction Event 5 Million Years Ago? [closed]

Five million years ago, a progressive downward slope in the global climate put an end to the Miocene Epoch and brought on the Pliocene Epoch. To get a visual idea, since we humans are a visual ...
7
votes
1answer
126 views

Can the human body hypothetically be magnetized/magnetically aligned?

I was thinking about how an MRI uses a strong magnetic field to align the spins of hydrogen atoms in the body. What I was wondering about was if the human body experienced a magnetic field much ...
1
vote
0answers
178 views

Creating a wormhole connecting two universes that have different elementary particles? [closed]

A civilization wishes to create a wormhole that connects two universes with different quantum fields from each other and different elementary particles to go with those different quantum fields. On ...
5
votes
3answers
165 views

How to effectively convince a populace living in a dome, that they're experiencing a spaceship landing?

I have a population living in a dome, and they have been for generations, totally sealed off from the outside world. What type of engineering would need to be in place to effectively convince the ...
15
votes
7answers
3k views

If a planet has 3 moons, is it possible to have triple Full/New Moons at once?

In the story I created, the Kingdom of Oneirou has 3 Moons--Artemis, Rahu, and Zorya--all of which have their own independent lunar cycles. However, it's officially stated as early as Chapter 2 or 3 ...
7
votes
1answer
129 views

Is muscle plasticity the same thing as when muscles regenerate from wear and tear?

Information I am writing a fantasy sci-fi, that is almost the same as our reality, the only difference being humans in this world are capable of using drugs (serums in their world) to improve their ...
8
votes
5answers
2k views

Creating a chemical industry from a medieval tech level without petroleum [closed]

You've been transported into a world with a medieval tech level. This world has coal deposits, but no petroleum deposits. You have no chemistry equipment with you, but you can use glassblowing or ...
11
votes
4answers
539 views

How strong can zombies really be?

Assume that average Joe dies in a zombie outbreak and is revived as a zombie pretty much immediately. How strong could that zombie be, assuming that: Zombification is done by "taking over" the brain, ...
6
votes
2answers
205 views

Can you replicate a being's DNA just from observing it?

In the movie Captain Marvel, the main antagonists (at least for half the movie), the shape-shifting Skrulls, can change their appearance to perfectly match any humanoid creature, down to DNA. ...