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13.1k posts
 
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Q&A 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 resource...

1 answer  ·  posted 5y ago by Innovine‭  ·  last activity 5y ago by Innovine‭

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Q&A 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. ...

1 answer  ·  posted 5y ago by Jacco‭  ·  last activity 5y ago by Jacco‭

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Q&A What sort of hip bone is required for quadrupedal animals to locomote on their hind legs?

I am designing a creature that is quadrupedal but can run after prey on its hind legs. What kind of hip bone would allow for the excess stress to be put on it during bipedal locomotion? The animal ...

4 answers  ·  posted 5y ago by MintySoftboi‭  ·  last activity 5y ago by MintySoftboi‭

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Q&A 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. ...

4 answers  ·  posted 5y ago by Greenie E. - Reinstate Monica‭  ·  last activity 5y ago by Greenie E. - Reinstate Monica‭

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Q&A Could a planet evolve to have jungles, woodlands, savannas and meadows - but no animal bigger than an insect?

I want to have a group of space colonists get stranded on a planet where the only way they can get enough nourishment is to gather or cultivate edible plants.

4 answers  ·  posted 5y ago by Bill Bittner‭  ·  last activity 5y ago by Bill Bittner‭

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Q&A Would a life form with the intelligence of a human but without an appendage for manipulating its environment be able to have advanced technology?

On another planet there is a life form that has the same level of intelligence as humans on Earth, but it has no appendage to manipulate its environment. It has similar social structures to humans...

3 answers  ·  posted 5y ago by Anders Gustafson‭  ·  last activity 5y ago by Anders Gustafson‭

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Q&A Why wouldn't my nuclear spaceships eject spent fuel?

In the year 2069AD, a spaceship is transporting hundreds of people in cryogenic sleep to a distant star. The spaceship engine is a nuclear fission reactor and its thruster is based on an ion drive ...

6 answers  ·  posted 5y ago by user6760‭  ·  last activity 5y ago by user6760‭

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Q&A 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 stor...

1 answer  ·  posted 5y ago by Nathan Hopp‭  ·  last activity 5y ago by Nathan Hopp‭

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Q&A Could a brown dwarf in our outer solar system remain undetected today?

We've all heard the on-again, off-again theories of another massive object in the vast reaches of the outer solar system. Some potential evidence to support the possibility are its affects on small...

2 answers  ·  posted 5y ago by Cereza‭  ·  last activity 5y ago by Cereza‭

Question space astronomy
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Q&A 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...

1 answer  ·  posted 5y ago by Renan‭  ·  last activity 5y ago by Renan‭

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Q&A Fireproof liquids that are non-toxic to carbon based life?

What sort of fireproof liquid could be used by carbon-based life without causing harm to the organism? Whether it be absorbed from exterior sources or produced in the organism's body. I say organis...

3 answers  ·  posted 5y ago by MintySoftboi‭  ·  last activity 5y ago by MintySoftboi‭

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Q&A 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...

2 answers  ·  posted 5y ago by Tristan Schott‭  ·  last activity 5y ago by Tristan Schott‭

Question planets
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Q&A What are the requirements for a river delta to form?

I know that when some rivers (such as the Nile) flow out to sea, they break up into several smaller channels. But I was wondering about the necessary features of the land and water for it to occur.

2 answers  ·  posted 5y ago by user64727‭  ·  last activity 5y ago by user64727‭

Question geography rivers
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Q&A Could a tree build its bark out of Starlite-like material?

How could trees in an environment with 23% Oxygen (The atmosphere is identical to earth in all other respects.) grow bark with Starlite-like qualities? Starlite is a material claimed to be abl...

4 answers  ·  posted 5y ago by MintySoftboi‭  ·  last activity 5y ago by MintySoftboi‭

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Q&A Justification of physical currency in an interstellar civilization?

I have seen a similar-ish question on here, but it doesn't quite match my inquiry. Suppose you have an interstellar civilization (the means of travel between stars being stable two-way wormholes o...

17 answers  ·  posted 5y ago by Cereza‭  ·  last activity 5y ago by Cereza‭

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Q&A Deep space acceleration limits?

Assuming the power source for such acceleration places no limit on things, how quickly can a space craft be accelerated to the speed necessary to cross the distance between Jupiter and the sun in a...

3 answers  ·  posted 5y ago by Cereza‭  ·  last activity 5y ago by Cereza‭

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Q&A What calendar would the Saturn nation use?

In my next novel, there are three major powers in the solar system: Earth, Mars, and Saturn. Earth runs on a slightly modified Gregorian calendar, Mars goes with the good old Darian calendar, and S...

5 answers  ·  posted 5y ago by Classified Angel‭  ·  last activity 5y ago by Classified Angel‭

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Q&A If quadruped mammals evolve to become bipedal will their breast or nipple change position?

As the title says, you know stuff like minotaur, lycanth or werewolf, cat or dog folk, etc especially for the female specimens. I want to know what happen if quadrupedal mammals which usually have...

4 answers  ·  posted 5y ago by Li Jun‭  ·  last activity 5y ago by Li Jun‭

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Q&A Which sounds could a tongueless person produce?

In my world, officials dealing with sensitive information have their tongues amputated. Naturally writing and a special, government-only sign-language are the main forms of communication, but crea...

2 answers  ·  posted 5y ago by A Lambent Eye‭  ·  last activity 5y ago by A Lambent Eye‭

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Q&A My perfect evil overlord plan... or is it?

Me You might call me evil but the facts are I deserve to rule all of the world, everyone & everything in it. What I already have done For years I have worked in the shadows (as much as you c...

30 answers  ·  posted 5y ago by cypher‭  ·  last activity 5y ago by cypher‭

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Q&A 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 gra...

3 answers  ·  posted 5y ago by T3db0t‭  ·  last activity 5y ago by T3db0t‭

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Q&A 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 wo...

4 answers  ·  posted 5y ago by T3db0t‭  ·  last activity 5y ago by T3db0t‭

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Q&A Drawing landmasses for this odd-shaped planet

I've just come here for some help drawing a map for this fictional planet where two roughly similar planets have been smushed into kind of pear shape like this: So this planet spins on an axis w...

2 answers  ·  posted 5y ago by Leonard Greenland‭  ·  last activity 5y ago by Leonard Greenland‭

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Q&A 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 thousan...

16 answers  ·  posted 5y ago by Kofthefens‭  ·  last activity 5y ago by Kofthefens‭

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Q&A What is the minimum required technology to reanimate someone who has been cryogenically frozen?

As part of the story I am writing, an individual has been frozen with relatively crude cryogenic technology, then preserved as well as possible. Given the constraints of biology, what would waking ...

5 answers  ·  posted 5y ago by Regan Koopmans‭  ·  last activity 5y ago by Regan Koopmans‭