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13.1k posts
 
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Q&A Is it plausible for self-destruct button to trigger a countdown?

Inspired by this question, and this article, activating self-destruct mechanism disengage coolant system for the ship's main reactor, which then increases the core temperature and triggers explosio...

10 answers  ·  posted 7y ago by Vylix‭  ·  last activity 7y ago by Vylix‭

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Q&A How would a plant convert magma to energy?

A follow up question for What is the method to produce food within a volcano caldera? How can a plant harness magma's heat to "photosynthesize"? It is very different from an animal, which can move...

3 answers  ·  posted 7y ago by Vylix‭  ·  last activity 7y ago by Vylix‭

Question creature-design
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Q&A How can a lava-eater metabolism explained?

Inspired by A.C.A.C's comment, how can the metabolism of an animal that is harnessing the heat from magma or lava be explained? I'm thinking of conventional "eating lava or magma", but it could be...

4 answers  ·  posted 7y ago by Vylix‭  ·  last activity 7y ago by Vylix‭

Question creature-design
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Q&A How to create a genetically high IQ population while avoiding regression to the mean as much as possible?

Let's say we have a group of high IQ individuals of a sizeable number. In what manner should they reproduce in order to maximise the odds of creating a genetically high IQ population over several g...

11 answers  ·  posted 7y ago by Logan545‭  ·  last activity 6y ago by Logan545‭

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Q&A How to hide the fact that you're in an O'Neill cylinder?

Let's say you've either cloned yourself a native population (the ethical option) or taken a bunch of volunteers and wiped all their memories of modern technology and society (the slightly more mora...

4 answers  ·  posted 7y ago by Z.Schroeder‭  ·  last activity 7y ago by Z.Schroeder‭

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Q&A How feasible is "invisible spray"?

I love watching cartoons and I love when they feature cool science gadgets. In an episode of Spongebob, Patrick and Spongebob buy invisible spray to pull pranks on people. They spray themselves and...

2 answers  ·  posted 7y ago by user73829‭  ·  last activity 7y ago by user73829‭

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Q&A How does an O'Neill cylinder generate its own magnetic field?

The purpose of a magnetic field is to shield against solar winds, which are relativistic ions produced by our Sun. This is a typical O'Neill cylinder with 4 islands. I'm looking for a cost effectiv...

3 answers  ·  posted 7y ago by user6760‭  ·  last activity 7y ago by user6760‭

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Q&A Could a solar superstorm or distant supernova wipe out all our extraterrestrial technology?

I'm imagining a universe where interplanetary, but intrasystem, space travel is common (e.g. at a similar level to The Expanse books/TV show) - but not necessarily our local solar system. Perhaps w...

4 answers  ·  posted 7y ago by jimbofreedman‭  ·  last activity 7y ago by jimbofreedman‭

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Q&A If you have multiple moons, do they behave in a standard way?

There are various questions about the stability of multiple moons, how they affect tides and so on, but I don't think this one has been covered here: If my planet has two moons, assuming they have...

3 answers  ·  posted 7y ago by glenatron‭  ·  last activity 6y ago by glenatron‭

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Q&A Could an unstable system of several celestial bodies exist?

Supposing there is a system of several (four to twelve) celestial bodies which are orbiting a star. In this system of bodies, each body is similar enough in size that no single body has a dominant ...

4 answers  ·  posted 7y ago by Rithaniel‭  ·  last activity 7y ago by Rithaniel‭

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Q&A What is an easy to access or make/extract poison

It must be ingestable and the victim can't detect by taste or smell, though easily detectable in an autopsy, if performed, but mimics regular illness so the first few deaths won't be autopsied (Due...

4 answers  ·  posted 7y ago by ChibiHoshi‭  ·  last activity 6y ago by ChibiHoshi‭

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Q&A Impact of Orcs ritually removing tusks at birth?

A sub-group of Orcs have settled into an area that is occupied by humans who culturally resemble the Greeks from the Hellenic period. These Orcs, who physically resemble Orcs from The Elder Scrolls...

4 answers  ·  posted 7y ago by Cody Ferguson‭  ·  last activity 7y ago by Cody Ferguson‭

Question society anatomy
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Q&A Radiation Protection in Mechanical Counterpressure Spacesuit

I want to use mechanical counterpressure spacesuits (something along the lines of BioSuit) for my story. They seem to have many advantages over traditional pressure spacesuits. The existing protot...

5 answers  ·  posted 7y ago by Olga‭  ·  last activity 7y ago by Olga‭

Question space
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Q&A Suppose the Orcs are mammals, why is their skin green?

Most species of animal, especially mammals, have a special skin cell the produces melanin, which is responsible for the color of their skin, but orcs are generally depicted as green creatures and, ...

10 answers  ·  posted 7y ago by user6760‭  ·  last activity 7y ago by user6760‭

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Q&A Boiling Underwater Layer on an Ocean Planet

I'm coming up with ideas for locations in my sci-fi story and I thought of an interesting one. Here's the scenario: A planet has a watery ocean sitting on heated bedrock. Temperatures range from 5...

3 answers  ·  posted 7y ago by Max Leeming‭  ·  last activity 7y ago by Max Leeming‭

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Q&A What planetary conditions would make flight easiest for both lighter than air and heavier than air craft?

What planetary conditions would make flight easiest for both lighter than air and heavier than air craft together? The planet is earth like and habitable, but the conditions can be adjusted to sui...

2 answers  ·  posted 7y ago by Slarty‭  ·  last activity 7y ago by Slarty‭

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Q&A Would a jellyfish type of animal be detectable by radar inside water?

On my world a jellyfish type of animal exists, it's an aquatic animal of course and extremely dangerous as it consumes anything organic it touches. It's thin and wide, like a fleshy transparent bl...

4 answers  ·  posted 7y ago by shieldedtulip‭  ·  last activity 7y ago by shieldedtulip‭

Question biology
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Q&A Terraform Mars or Dyson Ring?

Background: The main asteroid belt between Mars and Jupiter is the closest and richest source of non terrestrial resources to Earth in the solar system. Even though it is vast its resources are ob...

5 answers  ·  posted 7y ago by anon‭  ·  last activity 6y ago by anon‭

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Q&A O'Neill/McKendree Looping River

Is there a way to design a river system in an O'Neill/McKendree-style cylindrical habitat to passively feed into itself in an endless loop, from one end of the habitat to the other and back again? ...

7 answers  ·  posted 7y ago by rek‭  ·  last activity 6y ago by rek‭

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Q&A Telekinesis in Science Fiction

In my idea for a story, my main character has Telekinesis. My problem is, this is a definite hard science fiction world, and he is abnormal in the fact that he is the only known one who can perform...

15 answers  ·  posted 7y ago by fluffinator09‭  ·  last activity 5y ago by fluffinator09‭

Question science-fiction
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Q&A Extracting hydrogen from a star

How could you feasibly extract hydrogen from a star to power a plasma fusion reactor, with as little handwavium as possible? This takes place in a sci-fi setting, but isn't necessarily hard science...

1 answer  ·  posted 7y ago by worldsmith‭  ·  last activity 7y ago by worldsmith‭

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Q&A If my world is flat (obviously not possible) how would I explain the edges?

I don't want my world to be infinite, that would be a pain to draw maps for. And I need it to be flat (for a slightly unrelated reason). How would I explain why no one has looked over or seen the e...

28 answers  ·  posted 7y ago by Gray9‭  ·  last activity 5y ago by Gray9‭

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Q&A Could a Saturn-like hexagonal cloud be possible in an earth-like planet?

On saturn's north pole there is a hexagonal cloud which does not move. My question is: is it possible to theoretically make a hexagonal cloud on an earth-like planet? And furthermore, is it possibl...

4 answers  ·  posted 7y ago by Lavigo‭  ·  last activity 7y ago by Lavigo‭

Question planets clouds
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Q&A What kind of gas would allow a rock to float? And what kind of rock would it be?

Scenario + question: So for the purposes of this question lets so that there is a canyon much like the grand canyon but about 50 miles deeper, so the bottom is always in shadow and it has no observ...

4 answers  ·  posted 7y ago by Gray9‭  ·  last activity 5y ago by Gray9‭

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Q&A Binary star system, What time is it?

You are native to a planet that falls between two suns, thus ensuring eternal sunshine. How would we be able to tell the time? Do you formulate some kind of system based on which sun is in the sky...

9 answers  ·  posted 7y ago by ultorian‭  ·  last activity 7y ago by ultorian‭