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.

Filter by
Sorted by
Tagged with
3
votes
0answers
20 views

Dyson swarm and Coronal mass ejections - generating electricity

This is the second of two questions. Same introduction. A civilisation on Earth has just begun expanding with a Dyson swarm, which is a Dyson sphere but made with many satellites, to prevent ...
2
votes
3answers
28 views

Dyson swarm and Coronal mass ejections - protecting against solar flares

This is the first of two questions. Same introduction. A civilisation on Earth has just begun expanding with a Dyson swarm, which is a Dyson sphere but made with many satellites, to prevent structural ...
5
votes
2answers
52 views

How to Build the Fictional Continents Using Our Real Continents

Presented here is a map of Earth with the fictional continents resurfaced, by the Redditor "Stagman1111": Source From left to right, the presented additional continents are Mu, Atlantis and ...
11
votes
14answers
2k views

Why wouldn't a space fleet use their lasers for a precision strike?

You are the admiral of a fleet of warships in orbit around Saturn (EDIT: the individual ships can be anywhere in the Saturnian system, including into Titan's orbit), tasked with performing a precision ...
16
votes
6answers
2k views

How would a fruit causing longevity be identified as one?

With current (early-21st century) technology and science level, suppose that a new fruit is discovered on some island. This fruit is imported and marketed around the world. Unknown to anyone, this ...
-1
votes
2answers
124 views

Proving to the past that I am from the future [closed]

Let's say I've been able to travel in time and I am back in the past (just by a few years or even centuries). I do not have any modern gadgets or even modern clothes, just me and my 21st century mind. ...
2
votes
1answer
35 views

How to stop genetically modified bacteria from creating a catastrophic greenhouse effect?

I'm here on behalf of the Antarctic People's Liberation Front. Some call me a terrorist, but really, I'm just trying to build a better life for my people. Earth is a beautiful place, full of bright ...
4
votes
4answers
1k views

Could a mechanical bird with the wingspan of Vermont be able to fly?

I know it sounds kinda stupid, but I’m trying to create a really ominous figure that would always watch the player in this a hypothetical video game that I’m writing with my dad. We both agreed that ...
6
votes
4answers
507 views

Orbital Bombardment of Airships

Imagine that you're the admiral of a fleet of warships in orbit around Saturn. You need to capture targets on Titan, the largest moon. (This could also be applied to, say, Venus or one of the gas ...
3
votes
2answers
95 views

What POD Would I Need For Earth's Lost Worlds to Exist Today?

This is a map of Earth as depicted by the DeviantArtist ToonHolt: As you can see, many new landmasses have been added, from lost worlds like Sundaland, Zealandia and Kerguelen, to fictional worlds ...
1
vote
0answers
73 views

Fusion Orion Drive

Orion drives are awesome. Nobody can deny that. They are however a little outdated and still use pure fission pulse units. Obviously they are in need of an upgrade! A good place to start would be ...
0
votes
0answers
37 views

Does twice the planet radius mean two bands of desert per hemisphere?

Earth has three convection cells per hemisphere, resulting in each hemisphere having a band of desert at the end of the Hadley cells. Given a planet with the following characteristics: Twice the ...
1
vote
2answers
77 views

If visible light from the sun stopped hitting the earth but the sun still existed, how would this affect the earth?

The sun produces light, heat, and other things. If the visible spectrum of light from the sun stopped hitting the earth but only the light directly from the sun, so moonlight and if heat can be ...
2
votes
1answer
59 views

What would it look like if an artificial atmosphere began to disappear?

In my SciFi-Magic RPG campaign, the main characters are on Mars, which has been converted to a prison planet. A large device, drilled into the north and south poles, reaching into the core, heating ...
0
votes
2answers
92 views

Plausibility of a plastic/polymer at least as dense as iron for applications requiring high density

I've had a high fantasy/fictional universe building up in my head for years, however it's timeline extends much further beyond the classic middle ages, going up to modern times and having it's own ...
5
votes
10answers
2k views

Are railguns in space intended to be something that causes massive kinetic damage upon collision? Why wouldn't a railgun shot go right through?

Using the search engine here and on Google is not leading me to any answers. Assume no shields here or any unobtanium technologies. What happens upon impact of a projectile fired out of a railgun ...
0
votes
0answers
55 views

How do storms scale with planet radius?

I'm trying to figure out how weather scales with planet size, keeping other factors constant. For a specific example, say a planet with the following characteristics: Twice the radius of Earth. ...
3
votes
3answers
197 views

How would one hack a battleship in space warfare?

Note: I might have put way too much information here; I've bolded the most important things. Okay so here's the situation (this is the context in story; I'll bold the actual question): the Solar ...
5
votes
6answers
386 views

How do you keep a medicine's effect isolated to a particular body tissue?

In my world, a newly independent Mars established incentives to draw in scientists, engineers, and academics. Brilliant people flocked in from around the solar system, to fill high-paying but very ...
2
votes
1answer
65 views

Can a water world be turned into a dryer habitable planet by an early runaway greenhouse effect?

Consider an Earth clone with oceans several hundred kilometers deep, potentially deep enough to solidify into exotic ices. Such a planet would lose its initial hydrogen and helium atmosphere when the ...
7
votes
8answers
1k views

Realistic way of damaging a plane to lead to a survivable crash [closed]

I'd like to approach this in a sort of hard sci-fi way, where the following is grounded in something plausible. Suppose we want to take a plane down at a reasonable speed where there is a 30% chance ...
3
votes
1answer
142 views

Will owls become extinct without airglow?

Given a planet in most ways very similar to Earth (gravity, daylight, atmosphere etc.) with a full transplanted biosphere (all the familiar plants and animals), where the main difference is that as a ...
0
votes
0answers
37 views

What would be a good reason for a spaceship engine failure [closed]

I have a character whose father dies in a spaceship as he goes after her for doing something reckless. I'd ideally like it if the cause was half her fault but mostly the fault of the ship, however, I ...
2
votes
2answers
92 views

The Hydrolock - How to build a deep sea docking system?

How do you build a docking system at deep sea pressures? Example a Challenger Deep Sea Base at 10,000 meters seawater or approximately 1,000 atmospheres?
1
vote
2answers
72 views

Range of radio with no ionosphere

Given a planet otherwise similar to Earth, but which has (for reasons outside the scope of this question) no ionosphere, what would be the effective range of radio communication? I understand radio ...
0
votes
0answers
54 views

Will the Anatomical Differences in These Humanoids Affect Baby Development?

Okay, here are two hypothetical species of the genus Homo. One averages 67 to 84 inches (170-213 cm) in height and 99 to 110 pounds (45-50 kg) in weight and gives birth to twins. The other averages ...
5
votes
2answers
74 views

Energetics in a reducing atmosphere

I am working on a speculative evolution project, which takes place in a reducing atmosphere consisting mainly of methane, nitrogen gas, hydrogen gas and carbon dioxide, along with liquid ammonia as ...
-2
votes
1answer
79 views

A Hyperadvanced Civilization Had Created a Solar System From Scratch. Would the Specified Details Work?

Yes, you read that title right. A "hyperadvanced" civilization, an alien race with technology so advanced that we humans can currently dismiss it as alien-space-bat-magic. At the center of ...
-1
votes
0answers
46 views

Is my planet possible (sequel to Bacchus planet)? [closed]

I imagined a hypothetical planet named after Loki (the Germanic god of mischief, messenger of the gods, and creator of the earthquakes). Its main characteristic is an ocean more massive than the ...
4
votes
4answers
140 views

How would micromachines communicate?

The magic system of Second Earth boils down to "micromachines doing stuff". Of course, there are many layers of complexity to it. These micromachines are produced in the bodies of sapient ...
10
votes
3answers
813 views

What are the atmospheric/planetary effects of having no solar wind?

Suppose we have an earthlike world orbiting an artificial star which produces light but no solar wind. I would like to understand the implications that a lack of solar wind would have for the planet. (...
3
votes
4answers
118 views

Would a prehistoric Dragon be Bigger or Smaller? [closed]

I was recently thinking about Dragons, and got thinking about what they would have looked like in prehistory. Dragons were able to survive through the times due to two. main factors: Their Size. ...
13
votes
5answers
4k views

Is it possible to make a “safe” electromagnetic “jet engine” using extremely long wavelengths?

Here's the idea: Building a "jet fighter" that can operate in extended combat conditions with no atmosphere without losing air superiority in atmosphere. It's not going to have both ...
6
votes
3answers
553 views

How can I give my habitable planet argon in its atmosphere?

I want my planet's atmosphere to have roughly 10% argon so that its inhabitants can easily use it to color their lights purple. But I'm not sure how to explain the cause of this high argon content. ...
1
vote
3answers
89 views

Secondary moon with negligible effect on planet

I'd like to know how to set up a secondary moon for a very much Earth-like planet that I could use for religious and time measurement purposes in a novel but that would not change general situation on ...
4
votes
2answers
111 views

Naga evolution based on varanids

In some moment I saw a sketch representing some kind of naga, you know, a mythical species with human torso and the rest of the body with serpentine form, but in this case based on a speculative ...
4
votes
4answers
200 views

How Can a Creature With Focus Come to Exist?

Background: Alendyias is a world that was formed inside the Fracture of Reality, one that is still forming as the Fracture in Reality grows and absorbs other worlds in its path. Absorbed worlds and ...
4
votes
2answers
375 views

Is there a weaker alternative to gunpowder?

How plausible is it to have zinc-sulfur as the main propellant of a gun in the absence of better ones, like gunpowder and smokeless powder? If it isn't possible, is there a weaker, less effective ...
6
votes
3answers
149 views

Natural door-furniture for wombat-poop architecture

Real life It is a biological fact that wombat faeces are approximately cube shaped. Wombat poop: Scientists reveal mystery behind cube-shaped droppings It is also the case that wombats tend to make ...
1
vote
1answer
149 views

Figuring Out Giganto

Okay, so one of my monsters is a dinosaur called a Giganto, a Gigantosaurus mutated by Chaos Energy (more on that here). Like all my monsters, Gigantos have an Enchantment granted to whatever kills ...
3
votes
1answer
104 views

A civilization running simulations to select intellegences for space missions

My protagonist is a magician from Sword and Sorcery world with a soft magic system which wakes up in a spacecraft with a non intelligent voice interface which does exactly as told without any regard ...
5
votes
7answers
178 views

Could giant mermaids domesticate baleen whales?

While many mermaids are hunter gatherers some live a pastoral life, herding creatures like domesticated manatees. Along with this some mermaids (particularly giant mermaids) herd baleen whales using ...
5
votes
1answer
168 views

It would be possible to enter and exit a black hole using a Warp Drive? [closed]

Well, a Warp Drive expands and contracts space, passing it through you, technically allowing faster than light travel. And so, it would be possible to actually enter a black hole and thus, exit it? I ...
-2
votes
1answer
49 views

What was a Thermometer used for in the 14th century? [closed]

What was a Thermometer most commonly used for in the 14th century?
5
votes
4answers
293 views

What are limitations to 3D printing in the near future?

Extrapolating ~10-20 years from our current technology, what are some limitations with 3-D printing? Is the ability to print any type of matter in reach, or are there some fundamental issues that ...
3
votes
4answers
2k views

Probability of a spaceship stumbling upon a random planet?

In an intergalactic federation, space ships are extremely common. They run supply routes, defend planetary bases, and transport colonists to new worlds. To aid in these adventures, most ships would ...
1
vote
2answers
105 views

Climate in an Alderson Disk

First, i want to accept that alderson disks are basically imposible to create, due to a variety of reasons. With that out of the way, i want to ask what would be the hypothetical climate of an ...
17
votes
9answers
4k views

What disease could my time traveler find a definitive 'cure' for, without recognizing the specific disease

I've been toying with a story of person sent to a alternate reality that mirrors medieval Europe, but not necessarily with identical history/countries. The time traveler would earn the trust/support ...
2
votes
1answer
121 views

Maximum survivable time in the vacuum of space for an average human being [duplicate]

Suppose my character doesn't wear any kind of protection and is an average human being and the transitions from normal atmosphere to vacuum and back are instant. Further suppose that my character ...
5
votes
5answers
180 views

Theoretical Evolutions of Domesticated Lions

So in my fictional universe there is a collection of tribes which, over the millennia, domesticated a closely related ancestor to modern day lions, much like how humans domesticated closely related ...

1
2 3 4 5
148