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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.

0
votes
4answers
28 views

How can my android “die” permanently?

For this sci-fi story/world hat I'm building, I'm introducing my androids which, while having intelligence closer to a human, are still just machines in nature. Theoretically one can destroy the body ...
0
votes
0answers
7 views

What would life be like on a habitable, non tidally locked planet around a red dwarf?

A significant portion of one of my stories is planned to take place on Luyten B - https://en.m.wikipedia.org/wiki/Luyten_b - a potentially habitable exoplanet not far from the Sun. This is a rocky ...
28
votes
12answers
8k views

How many people are necessary to maintain modern civilisation?

Modern Earth; a series of connected events (natural disasters, mass migration, drug-resistant pandemic, collapse in biodiversity, armed conflict) have led to a significant reduction in human ...
1
vote
4answers
61 views

A weapon to rapidly change the Earth's atmosphere

I am seeking information and ideas from all you clever people. What I am trying to imagine is a chemical reaction that would change Earths atmosphere rapidly into something else which would be more ...
0
votes
2answers
20 views

Order of Limb Pair Types for Amphibious Creature (Hexanewt)

I need to add a bit of descriptive detail on a species from a brief description. Essentially add a bit of finer detail to someone else's broad-strokes worldbuilding. An amphibious species' body layout ...
9
votes
4answers
370 views
+100

Vertical cyclones in a rotating space habitat

A common, matter-efficient, science-fiction habitat is a hollow cylinder or ring in space that is spun to simulate the pull of gravity on its interior surface. While for most purposes this artificial ...
8
votes
5answers
159 views

Geothermal Oasis Alternatives on Ice Planet

I have an Earth analog that is nearly completely covered in ice and glaciers. I want to have oases of warmth scattered across the planet. These oases aren't tropical by any means, having just enough ...
5
votes
1answer
171 views

Acceleration/Deceleration equation for travel within a solar system

Basics: There is a wormhole in a fixed position within a solar system. It is roughly 40 million miles from the orbit of the habitable planet, which kind of mimics Earth (roughly 12 month solar orbit ...
43
votes
17answers
9k views

For what reasons would an animal species NOT cross a *horizontal* land bridge?

In my worldbuilding project, 2 continents located on roughly the same latitude are connected by a land bridge. Both sides of the bridge are surrounded by a temperate grassland, and the lack of seasons ...
32
votes
28answers
5k views

Justifying Affordable Bespoke Spaceships

Any story about an independent, self-owned tramp spaceship crew tends to implicitly or explicitly raise the question of how the crew got a spaceship, how it afforded it, and why it doesn't just sell ...
3
votes
0answers
54 views

Useable life span of different types of plastic and polymer [on hold]

OK folks - here's one for you petrochemical types: World is set 200 years post an apocalypse that wipes the global population back to about 280 million (the population of the world circa 1000AD). ...
38
votes
8answers
4k views

Evidence of spacetime anomaly in local geology?

My current project features a contemporary scientist who is convinced that some sort of spacetime anomaly occurred in a tiny rural Yorkshire, U.K. community circa-1850; he believes a dilapidated old ...
7
votes
6answers
2k views

How to maintain a closed environment for one person for a long period of time

Background: In the early 2020s a magical life-extending "elixir" is created but is in short supply. However, a very reckless individual steals most of the US's supply and drinks a sufficient amount of ...
24
votes
12answers
7k views

Can an escape pod land on Earth from orbit and not be immediately detected?

I'm writing a soft scifi novel that has its fair share "fi" but every now and then I feel it important to acknowledge some "sci." In this scenario, a spaceship is in orbit and about to land on ...
27
votes
12answers
5k views

Is there any way to truly hide a spaceship?

Space is two things: empty and (mostly) dark. This makes it really, really hard to hide in it, because to do anything in it, chances are, you'll be shining a big bright light through it. Even if you'...
8
votes
5answers
1k views

What are some of the expected properties of metallic glasses and some steps to create them? (semi-ELI5)

I'm currently bouncing around ideas for a sci-fi / cyberpunk world and one of the major technologies in this universe is the manufacture and usage of metallic glass. I don't want to handwave too much ...
-1
votes
2answers
95 views

How can you make water a solid that is not ice [on hold]

I have made water into ice but is there a way to make it a solid without freezing it or somehow turning it into ice?
7
votes
2answers
384 views

What element would make up a creature if it used the weak nuclear force during its metabolic processes?

I was doing some research on how to design a scientifically possible alien, when I came across an interesting section on metabolism. I found it very interesting and read about the weak force, as ...
-2
votes
1answer
163 views

What is the opposite of lightning? [on hold]

I want to know what is the opposite of lightning. To give you some background, it has to be something that makes up a large aspect of the universe and cannot be anything in this list: space, time, ...
-3
votes
0answers
88 views

what is a negative charge and how is it made [on hold]

When I state negative charge I mean a negative charge that you will find in electrons, please explain it in simple terms when possible to allow a better understanding of what you mean as I have not ...
12
votes
4answers
919 views

How could you dig a hole through the fluid mantle of a planet?

The Question of the Tunnel through a Planet grinds my mind. How could you dig a Hole through the fluid mantle of a planet? Would your walls not constantly break and collapse on you after the 15-20 ...
-2
votes
1answer
104 views

Dig a hole to China [duplicate]

Every young kid has the dream at some point in their life of digging a hole to the other side of the world. With today's technology and an unlimited budget, would it be possible to create a tunnel ...
6
votes
4answers
3k views

What needs to happen to stop a tornado?

In Star Trek TNG, you hear about some sort of defense back on earth that is supposed to screen out all the bad weather. In the episode "True Q," it is mentioned several times as being capable of ...
7
votes
3answers
560 views

Effects of gravity upon weather?

So there are loads of things that are taken into account with weather from geology to water currents to axial tilt etc. But i am wondering what the effects would be on weather on planets with varying ...
0
votes
3answers
112 views

How might wizards figure out how to walk on the moon? [on hold]

A group of wizards is currently planning a trip to the moon to study why it makes werewolves happen. They plan to teleport to the lunar surface, do a few hours of investigation (e.g. watch samples of ...
6
votes
2answers
137 views

If Earth's Oceans Were as Deep as Europa's

Earth's deepest point, the Challenger Deep, is almost seven miles below sea level. By contrast, Europa is smaller than even Earth's moon, yet its oceans are anywhere between 40-100 miles deep! So the ...
42
votes
10answers
7k views

Electricity free spaceship

Assume there's a spaceship in earth orbit that its crew of 24 want to get to Mars, the crew are all humans and possess all of modern day knowledge and equipment, is it possible for said ship to make ...
16
votes
5answers
5k views

At what temperature should the earth be cooked to prevent human infection?

Humans are the equivalent of bacteria to planet-eating monsters. And since, as we all know, eating humans is dangerous business, these monsters have decided to cook our great planet Earth before ...
5
votes
1answer
112 views

Solar insolation/flux's effect on biome diversity/richness on an alien world

The Questions I'm trying to answer three main questions: Does a three-axis biome chart make sense for my world? How productive/life-rich should a biome be given a specific level of solar flux (...
4
votes
3answers
208 views

For people on earth, is it possible to harvest energy by decelerating the planet rotation?

I was working on a side project to design an alien fleet that is wandering in the universe, and harvesting energy from planets for their needs. While I can think of ways to make that happen (...
25
votes
27answers
8k views

Is it possible to have battery technology that can't be duplicated?

I'm creating a near future world where one faction is using high energy density batteries that enable their vehicles to outperform gasoline based technology. Like cold and silent aircraft and ...
4
votes
4answers
287 views

How can spies and whistleblowers protect themselves from a government that wants to silence them?

When it comes to an angry government the ending can be: Acute Radiation Sickness (FSB defector Alexander Litvinenko) imprisonment (whistleblower Chelsea Manning) 'car accidents' (journalist Serena ...
3
votes
8answers
350 views

How can I make the Solar System uninhabitable?

For the Universe I'm creating Humanity has devolved into groups of scattered tribes. This is due to the fact we ran afoul of a really nasty alien race, who decided to leave us homeless. A coalition of ...
-7
votes
1answer
87 views

Is it possible to get doctors to believe you have recently become intellectually disabled? [closed]

Is it possible to get doctors to believe you have recently become intellectually disabled? I don't care how you do it, lead poisoning or some kind of traumatic brain injury, just as long as you don't ...
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 ...
9
votes
5answers
588 views

How durable are silver inlays on a blade?

Motivation (fictional of course) Fantasy is full of references to silver swords and other weapons thought to make a poor lycanthrope‘s life miserable. Since silver appears to be too soft for blades, ...
68
votes
10answers
9k views

How can powerful telekinesis avoid violating Newton's 3rd Law?

Characters with powerful telekinesis are portrayed as being able to exert a superhuman force using only their minds. For example, they can throw a car. Based on what I remember from high school ...
3
votes
3answers
136 views

Mechanical/Cybernetic Replacement for Eye and Optic Nerve

My character has a prosthetic, or technically you could say a bionic or cybernetic, left eye. For one reason or another, the replacement eye couldn’t be connected directly to the optic nerve. Instead, ...
10
votes
5answers
784 views

Is it possible to use a planet's magnetic field for transportation?

On a planet, a species uses magnets (i.e. float in the air) instead of wheels for transportation. Roads are easy enough, just slap some magnets in it, at it works. But I was wondering about the ...
2
votes
2answers
214 views

Anatomically Correct Ego Sword

I'm reading a comic set in a really unique fantasy game. One of the creatures that really caught my attention were a type of slime/sword called ego sword. In their normal form they're a blob but can ...
21
votes
7answers
16k views

Are portals possible?

In a video game series called Portal, we are given a gun, which shoots two portals: an orange one and a blue one. These portals have the following properties: Anything that goes into the orange ...
24
votes
11answers
4k views

Why is long-term living in Almost-Earth causing severe health problems? [on hold]

The people of Magical Almost-Earth needed the Chosen One to be brought from our world. Now that the day has been saved, Chosen One would have liked to stay, marry some royal sibling and enjoy life in ...
8
votes
4answers
630 views

Spaceship Emission Security

In my military scifi novel the military is, obviously, very concerned with security aboard its spaceships. They don't want other people to be able to receive any information about what happens on ...
2
votes
5answers
1k views

Effect of 32 hour days?

What would the effect on humans be of a 32 hour day rather than 24 hours? It would be a pretty much even split of 16 hour days, 16 hour nights. The people would have previously been on a spaceship for ...
10
votes
2answers
171 views

How long would this eclipse last?

For a moon orbiting a gas giant which is in turn orbiting a star, I want to know how long the eclipse would last for an observer standing on the moon when the planet passes between the moon and the ...
33
votes
5answers
7k views

Dyson sphere with mirrors

What would happen if the entire inner surface of a Dyson sphere (not necessarily a solid shell, maybe a very dense swarm) would be coated into a highly reflective material? Let's say it can reflect ...
6
votes
1answer
177 views

How could a foam habitat support animal life?

Knowing foam is formed by trapping pockets of gas in a liquid or solid, what could a foam able to support life on an earth-like planet be made of? This foam ought to be stable enough and large enough ...
5
votes
2answers
291 views

A deadly disease, 95% of the population dead, suppresses or alters memory in unpredictable ways

Whilst not strictly relevant to this question, the questions and answers may interest the curious: this is the 4th in a series of question here - 1, 2, 3. My population (in excess of 500,000) ...
51
votes
14answers
10k views

Would a steam powered plane be able to cross the Atlantic ocean?

In a world where the development of internal combustion engines had been seriously delayed (for whatever reason), would it have been possible to power heavier than air aircraft by steam propulsion? ...
10
votes
1answer
153 views

Moons in Binary Orbit

Writing a werewolf story, and decided for a bit of flair, so I wanted two moons in orbit. Did a bit of digging, and I found out that to do that, I'd need to either have them in separate orbit (no ...