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13.1k posts
 
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Q&A How can I tell I've travelled 20 million years into the future?

Story starts out about 100 years from now. While in orbit around Earth preparing for an interstellar mission, our spacecraft encounters some hand-wavey spacetime anomaly such that we're still in o...

7 answers  ·  posted 7y ago by John Bode‭  ·  last activity 7y ago by John Bode‭

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Q&A How can a desert have high humidity?

Deserts are known to be hot and dry places. In my desert, I need a high humidity in the air. It doesn't have to be near the ground, but at least the atmosphere below 1 km should have a layer of hig...

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

Question weather deserts
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Q&A What If Earth Had an Equatorial Ridge

Saturnian moons Iapetus, Atlas, and Pan all have equatorial ridges. There's a few explanations as to why, but the theory behind why Iapetus has one is what intrigues me. (https://en.m.wikipedia.org...

1 answer  ·  posted 7y ago by Lot-Of-Malarkey‭  ·  last activity 7y ago by Lot-Of-Malarkey‭

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Q&A Would merfolk's spaceship need artificial gravity?

Imagine a spaceship constructed for merfolk and it is completely filled with oxygenated water instead of air. Since they can swim around effortlessly in the water, do they even need artificial gr...

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

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Q&A How do you detect a rock in interstellar space?

You are on a generation ship in interstellar space, between star systems. We know that there are rocks whizzing around out there - escaped asteroids, bashed planets, we have even put a few artifici...

8 answers  ·  posted 7y ago by Justin Thyme‭  ·  last activity 7y ago by Justin Thyme‭

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Q&A How Would It Feel To Walk On A Rocheworld?

A while back I saw this video talking about the habitability of double planets and Rocheworlds. I haven't seen any questions about the latter case here, so I decided to take a swing at it. For so...

1 answer  ·  posted 7y ago by Lot-Of-Malarkey‭  ·  last activity 7y ago by Lot-Of-Malarkey‭

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Q&A Realism of this Respawning Creature

I am writing a story (well, developing one) in which a humanoid intelligently genetically engineered species is effectively immortal. The creature maintains its lifespan through a thick-shelled see...

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

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Q&A Size of the "Monster Hunter" planet

Imagine a world in which you have all the creatures from the game franchise "Monster Hunter"... Screenshot from the upcoming Monster Hunter World game ...and when I say all the creatures I mea...

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

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Q&A Could Air-Breathing Mermaids Colonize Atlantis?

I rediscovered this article recently and loved all the creative answers on how a mermaid might build underwater. This, for me, brought to mind Atlantis, the kingdom that sank into the sea. I've...

2 answers  ·  posted 7y ago by Lot-Of-Malarkey‭  ·  last activity 6y ago by Lot-Of-Malarkey‭

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Q&A Building An Android

I'm in the midst of writing a space opera, and there are several characters that are sentient androids and I need some help with their physiology. I have them set up with small fusion cores for pow...

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

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Q&A Could pulsars really act as "lighthouses" to help in interstellar travel?

I was reading an article that said pulsars could be used in the far future, by travelers, by acting as "lighthouses" in space and aiding in interstellar travel. In a galaxy wide civilization, would...

1 answer  ·  posted 7y ago by user73829‭  ·  last activity 7y ago by user73829‭

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Q&A How to increase the availability and quantity of Mercury on an Earth-like planet?

According to this list mercury only makes up 6.7×10-6 % of the Earth's crust (by mass, I believe; though even if it's by number of atoms it's still tiny). I'd like to make mercury sufficiently c...

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

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Q&A Long-term memory loss

What could I "use" to cause a population wide long-term memory loss. So far all chemicals that I have read about cause future memory loss. That is to say, if you are exposed to it today, tomorrow ...

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

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Q&A Spaceship orbiting a black hole under the event horizon - a prison where no one escapes

The relationship between the distance, $d$, of the event horizon from a black hole's center and the tidal acceleration, $a$, experienced by an object near a black hole allows for scenarios in which...

6 answers  ·  posted 7y ago by Austin A‭  ·  last activity 6y ago by Austin A‭

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Q&A How would two Jackalopes fight each other?

Considering a world with Jackalopes. These half-rabbit half-antelope creatures stand a little over 2 feet long when fully grown and have horns like a deer growing 1 to 2 feet in length. Like deer...

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

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Q&A Creating a dark world - What kind of flora can I get away with

Primary question If this world averages a visible light level of civil twilight (about 1000x dimmer than full daylight, or 500x brighter than full moonlight) during the day, what kind of plants ca...

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

Question environment flora
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Q&A How long would it take a civilization to see and understand a Dyson ring?

If a star had a Dyson ring of some kind around it, such that to the naked eye the star wouldn't dim at all, how long would it take a civilization to reasonably see and understand the Dyson swarm, a...

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

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Q&A Is this gas giant possible?

I want to create a gas giant planet. The parameters I would like for it to have are: It should have a large layer of gas within its atmosphere that living creatures including humans can survive an...

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

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Q&A Can a Lagrange point move relative to other forces acting on it

In this recently asked question on a large, sun blocking object it is pointed out in the comments that there would be ~10e7 N of thrust from the sun due to solar wind. My question is does there ex...

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

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Q&A How can I make manure without cows?

Background There is a world with flora and fauna based on the life forms that evolved on Gondwana (see here for previous questions). Humans colonized this continent from a distant one some thousan...

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

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Q&A How big would a satellite need to be to block out the sun?

I have a story idea that involves a human attempt to halt and reverse global climate change. The idea is a simple one - a satellite that partially blocks out the sun. The satellite is located at th...

9 answers  ·  posted 7y ago by Coomie‭  ·  last activity 5y ago by Coomie‭

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Q&A What could be an event which would wipe out most life on Earth and cause massive changes to Earth's ecology, but which humans can survive in bunkers?

So as the title describes, I need an apocalyptic event which is survivable by cryogenically preserved humans in hermetically sealed bunkers underground (or somewhere else). This event should wipe o...

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

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Q&A What would be the effects on the enviroment if a Giant walked by in a world with Earth like physics?

I recently came by the many questions of scaling creatures and the square-cube law in real world physics right here, and it piqued my interest a bit to make this question. Think of it as an exercis...

1 answer  ·  posted 7y ago by Emmanuel Gonzalez Caseira‭  ·  last activity 5y ago by Emmanuel Gonzalez Caseira‭

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Q&A How much sunlight would I need to block to stop / reverse climate change?

Using this handy dandy graph, I estimate that by the time climate change forces a response we will need to reverse 2° Celsius of heating. The method for temperature control is described in here ...

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

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Q&A What would be the consequences of these biological changes to a human

So let's say you changed a human's DNA to give him: a thick exoskeleton that is a lot like that of a mantis shrimp (to make him bullet-proof) very small holes all over his body to use to breathe ...

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