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13.1k posts
 
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Q&A How can I dissolve metal hinges safely?

So, I've wound up in jail again (not my fault - I didn't start that fire, honest!) and I need to get out of here before the mayor has a chance to check his safe. Unfortunately, I left my lockpicks ...

6 answers  ·  posted 6y ago by Benubird‭  ·  last activity 6y ago by Benubird‭

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Q&A What sounds can someone make with a blocked throat?

Fraternizing with the neighbor species led to a bit of a mix-up, and an unfortunate reaction that ended with a face (and mouth) full of this alien substance. Consistency is like a thick mucous mi...

3 answers  ·  posted 6y ago by user40385‭  ·  last activity 6y ago by user40385‭

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Q&A Oceanic crust formation

I'm working on a earth-like planet with a much lower sea level (like 3000m so the mid-ocean ridge would form many islands) but is that even possible? Will the emerged ridge make some weird stuff an...

1 answer  ·  posted 6y ago by Jean-Abdel‭  ·  last activity 6y ago by Jean-Abdel‭

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Q&A Why shouldn't we turn every star system into a Matrioshka brain?

Given the amazing computational power of Matrioshka Brains (M-brains), all the amazing things it can do, including but not limited to the following. Allotting space for an almost perfect simulati...

10 answers  ·  posted 6y ago by Kyle Zabala‭  ·  last activity 6y ago by Kyle Zabala‭

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Q&A Are plastic plants plausible?

Edit: some answerers seem to be slightly misunderstanding the nature of the premise. Remember that the concept here is this; In the Precambrian of Earth, bacteria evolve to extract the abundant chl...

5 answers  ·  posted 6y ago by SealBoi‭  ·  last activity 6y ago by SealBoi‭

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Q&A climate and behaviour of a gaseous ocean

Following up on my last question about the ecology of my skyworld here, I decided to go more in-depth and fundamental. This is going to mostly be about the behavior of the ocean and changes to the ...

1 answer  ·  posted 6y ago by user199429‭  ·  last activity 6y ago by user199429‭

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Q&A A reasonable scenario/mass motivation to colonize Mars for the first million of people with enterpreneural spirit

According to Elon Musk's plans/overall mission, humans could better survive as species if we inhabited more than one planet. So far so good, he proposes settling a million people in a first city a...

11 answers  ·  posted 6y ago by J. Doe‭  ·  last activity 6y ago by J. Doe‭

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Q&A How plausible is molecular disequilibrium from Ant-Man and the Wasp?

So if you haven't watched the film, basically there's this one character who suffers from a (fictional) condition referred to as "molecular disequilibrium." As described by the character, it's a co...

5 answers  ·  posted 6y ago by fairsky‭  ·  last activity 5y ago by fairsky‭

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Q&A Blackholes as Perfect Recyclers or Perfect Batteries: Safe storage, recharge, and usage

Consider the facts that a blackhole: Eats everything that passes through its event horizon. In layman's terms, it is defined as the shell of "points of no return", i.e., the boundary at which...

3 answers  ·  posted 6y ago by Kyle Zabala‭  ·  last activity 6y ago by Kyle Zabala‭

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Q&A Moon that changes color with phase

In a world I am building, I would like to have the moon change color when seen from the planet's surface as it goes through its phases (e.g., the crescent after new moon is blood red, a quarter moo...

14 answers  ·  posted 6y ago by Aliden‭  ·  last activity 6y ago by Aliden‭

Question moons
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Q&A Can this planet exist, within our understanding of science?

Can a rocky planet have these qualities and exist: half of earth's gravity 4/5 earth radius a magnetic field capable of retaining an atmosphere a slightly slower rotation than earth can sustai...

4 answers  ·  posted 6y ago by Adeyemi Akintunde Oyemade‭  ·  last activity 6y ago by Adeyemi Akintunde Oyemade‭

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Q&A How can I explain the geography and climate of my planet?

I've recently decided to revive an old project of mine involving an alien planet. Unfortunately, however, I was not as good a worldbuilder then as I am now, and that's having some consequences. Ba...

2 answers  ·  posted 6y ago by SealBoi‭  ·  last activity 6y ago by SealBoi‭

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Q&A Sailing without wind, but with strong currents

Context On my world, there is a lot of water: sea, oceans, ... There are also firm land and islands, so it's interesting to travel on the water. The problem is that there is NO wind at all, and lo...

9 answers  ·  posted 6y ago by Legisey‭  ·  last activity 6y ago by Legisey‭

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Q&A Concise, formal way of describing a particular meridian of a moon

Say I have a moon orbiting a planet. Due to tidal locking, if we model the moon as a sphere, there exists an axis which passes through the center of the moon which is always pointed toward the cent...

2 answers  ·  posted 6y ago by RedRobin‭  ·  last activity 6y ago by RedRobin‭

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Q&A How to detect trespassing in space?

So, the United Terran Federation and the Qulian Star empire have been in really bad terms lately. Wars, skirmishes, it pretty bad. So, the UTF and QSE have made an agreement. No ships piloted by ci...

6 answers  ·  posted 6y ago by Jasper R.‭  ·  last activity 6y ago by Jasper R.‭

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Q&A A snow sea: How to make water snow light/smooth enough to obtain fluid properties under 1 gravity

A roughly earth-size planet orbits a cool G-class star, but barely within its circumstellar habitable zone ("Goldilocks zone") allowing liquid water. It has a shallow inclination and and lackluster...

2 answers  ·  posted 6y ago by rgtgd‭  ·  last activity 6y ago by rgtgd‭

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Q&A Weight of Colossal Fantasy Creatures Based on Length and Dimensions

I'm pretty much looking for an easy (or not) formula for calculating the mass and/or weight of fantasy creatures on an Earth-like planet with similar gravity. My world's dragons sometimes reach ove...

2 answers  ·  posted 6y ago by OrangeLegion‭  ·  last activity 6y ago by OrangeLegion‭

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Q&A How bright does this planet look from its neighboring planet?

I have two planets that share an orbit around a pair of stars at a distance of 2.05 Earth-AU from the Barycenter of those two stars. (I can provide more details about the two stars, if needed) Usi...

1 answer  ·  posted 6y ago by z2a‭  ·  last activity 6y ago by z2a‭

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Q&A Navigation on a tidally locked planet

I have a tidally locked planet on a circular orbit, with an axial tilt of 22.5° That means one side is always in the sun, the other one in the shade. The subsolar point moves along a north-south l...

3 answers  ·  posted 6y ago by nAUTILUS‭  ·  last activity 6y ago by nAUTILUS‭

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Q&A What would happen to a planet after a quarter of it had been blown up?

An alien species has created a weapon. The alien stands on a planet, points the weapon at the ground, and pushes a button. A large amount of matter condenses itself into a mass, creating a huge hol...

2 answers  ·  posted 6y ago by Lindy Ray‭  ·  last activity 6y ago by Lindy Ray‭

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Q&A Can a planet have warm or temperate climates within its polar regions?

Note: an edit has been made to the main question at the bottom A couple of years ago, I had a worldbuilding project which I have recently revived. I was relatively new to worldbuilding back the...

3 answers  ·  posted 6y ago by SealBoi‭  ·  last activity 6y ago by SealBoi‭

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Q&A The Nightfall / Kalgash System

"Nightfall" by Isaac Asimov (you can hear the story here on escapepod, if you need it) postulates a planet in a multi-sun system. The orbital mechanics of the 6 suns result in all of the sides of t...

1 answer  ·  posted 6y ago by Trish‭  ·  last activity 5y ago by Trish‭

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Q&A How can a ship dock in space?

Due to the outcome of this question (Is there any way to Terraform Ceres?) I am now working on the concept of shell worlds. Docking would be done by large spires with adjoining rings where once th...

8 answers  ·  posted 6y ago by Celestial Dragon Emperor‭  ·  last activity 6y ago by Celestial Dragon Emperor‭

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Q&A Using science, how could an animal achieve lift/flight by using pressure?

Say for instance we had a humanoid creature. how would they achieve flight by taking in a gas then expelling it at a greater pressure from a point on their body like the feet, back, or hands?

4 answers  ·  posted 6y ago by Jiccs‭  ·  last activity 6y ago by Jiccs‭

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Q&A Where would a dense population of human beings live underground?

By that, I don't mean what type of structures, I mean under which part of the Earth? It's an extremely densely populated nation. As densely populated as many major cities - think Hong Kong and more...

3 answers  ·  posted 6y ago by nondelicate‭  ·  last activity 6y ago by nondelicate‭