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General Q&A about worldbuilding and other speculative developments that can be extrapolated from science.

10.5k posts · Subscribe
Activity Age Score Native Lottery
81%
+7 −0
Is it possible to create a beam of non-relativistic neutrinos?

1 answer  ·  last activity 18 days ago by dmckee

physics technology relativity particle-physics
80%
+6 −0
Would a huge amount of asteroids hitting Earth change its rotation speed or destroy the planet?

1 answer  ·  last activity 2 days ago by HDE 226868

asteroids earth
77%
+5 −0
How efficient can a Dyson sphere be?

0 answers  ·  last activity 8 days ago by HDE 226868

physics dyson-spheres megastructures energy materials
77%
+5 −0
What Factors Could Cause a World to See "Northern" Lights Much Closer to the Equator?

4 answers  ·  last activity about 1 month ago by aCVn

astronomy atmosphere
75%
+4 −0
What conditions would cause an extremely dense (dark) coniferous forest to grow?

1 answer  ·  last activity about 1 month ago by Olin Lathrop

climate forestry ecology
75%
+4 −0
Competently Mobile Photosynthetic Animal?

1 answer  ·  last activity 11 days ago by Cazadorro

biology science-based plant animal
71%
+3 −0
What would the sky view be like of a final stage massive merged galaxy?

1 answer  ·  last activity about 1 month ago by HDE 226868

astronomy galactic
66%
+2 −0
How fast would strange matter conversion go?

1 answer  ·  last activity 18 days ago by HDE 226868

science-based physics quantum astrophysics
66%
+2 −0
How long would a planet that losses its gravity take to break up?

1 answer  ·  last activity about 1 month ago by HDE 226868

physics gravity science-fiction
66%
+2 −0
Do seasons occur on a tidally-locked planet?

4 answers  ·  last activity about 1 month ago by HDE 226868

astronomy planets seasons astrophysics tidally-locked
66%
+2 −0
How large would be the habitable area in a tidally locked planet?

2 answers  ·  last activity about 1 month ago by Mister Onion

planets
66%
+2 −0
Restricted Directions for an Alcubierre Drive?

0 answers  ·  last activity 7 days ago by HDE 226868

science-based spaceships science-fiction
66%
+4 −1
Black as color of magic

2 answers  ·  last activity 21 days ago by Aliza

vision colors
66%
+2 −0
Avoiding Incidental Ion Drive damage to Following Vehicles?

0 answers  ·  last activity 3 days ago by Cazadorro

space-travel ion drive
66%
+2 −0
How do seasons work in a binary system (planet orbits one star, not both)?

5 answers  ·  last activity 23 days ago by Monica Cellio

planets science-based stars light
66%
+2 −0
Interstellar internet use cases, or "What if the internet was mail-order?"

5 answers  ·  last activity over 5 years ago by AdamHovorka

space internet
66%
+2 −0
What impact is required for a visible (from Earth) ejecta plume on Earth's Moon, and would the Moon survive?

3 answers  ·  last activity over 3 years ago by aCVn

astronomy planets science-based earth
66%
+2 −0
How can the Hertzsprung-Russell diagram be used in star building?

3 answers  ·  last activity about 1 month ago by HDE 226868

astronomy stars
60%
+1 −0
What would be different if a person has broader visual spectrum than normal

2 answers  ·  last activity about 1 month ago by Monica Cellio

society science-based humans vision
60%
+1 −0
How efficient can my neutrino detector be?

3 answers  ·  last activity over 2 years ago by HDE 226868

space science-based power-sources supernova energy
60%
+1 −0
What do Martians use for months and weeks?

5 answers  ·  last activity over 2 years ago by kingledion

astronomy planets orbital-mechanics time-keeping
60%
+1 −0
What element would make up a creature if it used the weak nuclear force during its metabolic processes?

2 answers  ·  last activity 11 months ago by Amoeba

reality-check science-based creature-design nuclear weak-force
60%
+1 −0
How to use a certain technology to communicate with colonies but keep the how-to a secret?

7 answers  ·  last activity over 1 year ago by Aventinus

science-based communication space-colonization science-fiction security
60%
+1 −0
Can planets collide and not melt together?

4 answers  ·  last activity over 1 year ago by SlothsAndMe

planets astrophysics
60%
+1 −0
Would there be any major disadvantages for a species to have six legs instead of four?

13 answers  ·  last activity over 1 year ago by aCVn

evolution creature-design
60%
+1 −0
How can I make a net beneficial genetic trait occur only in a small fraction of the population, sustained?

10 answers  ·  last activity over 2 years ago by aCVn

biology reality-check evolution science-based genetics
60%
+1 −0
How can I destroy a gas giant planet?

10 answers  ·  last activity over 2 years ago by aCVn

space planets science-based
60%
+1 −0
Prison in space

4 answers  ·  last activity over 5 years ago by Pavel Janicek

space society futurology
60%
+1 −0
What would the sky look like to a being inside the event horizon of a black hole?

5 answers  ·  last activity over 5 years ago by aCVn

space science-based black-holes
60%
+1 −0
How could a bad random number generator explain baryon asymmetry?

3 answers  ·  last activity about 1 month ago by HDE 226868

science-based physics antimatter computers
60%
+1 −0
Are geographically typed planets realistic?

5 answers  ·  last activity 2 days ago by aCVn

reality-check planets geography
60%
+1 −0
How would having multiple moons affect tides?

6 answers  ·  last activity over 3 years ago by Monica Cellio

planets moons
60%
+1 −0
What would have to happen in order to force us to live in the ocean?

3 answers  ·  last activity over 5 years ago by Clean Ogre

environment underwater apocalypse isolation earth
60%
+1 −0
How does animal size affect individuals' agility and speed?

1 answer  ·  last activity 9 months ago by aCVn

science-based fauna creature-design
60%
+1 −0
What would happen if the oxygen levels decreased by 15 percent?

5 answers  ·  last activity over 1 year ago by CrazySlayaNinjaBear

biology humans oxygen
60%
+1 −0
Would it be impossible for me to have a nebula in my planet's night sky?

2 answers  ·  last activity over 4 years ago by Mikey

astronomy planets stars
60%
+1 −0
How will uploaded personalities be represented in a government?

5 answers  ·  last activity over 4 years ago by Jim2B

society politics artificial-intelligence singularity
60%
+1 −0
What if the Planck constant was exactly zero?

3 answers  ·  last activity about 1 month ago by HDE 226868

physics quantum
60%
+1 −0
Is it possible to build long-lived macro-scale structures out of non-atomic substances?

5 answers  ·  last activity 11 months ago by ckersch

science-based materials
60%
+1 −0
What types of musical instruments would develop underwater?

6 answers  ·  last activity over 3 years ago by HDE 226868

underwater music
60%
+1 −0
Why would robots use verbal communication?

16 answers  ·  last activity about 2 years ago by QuiquÈ…

communication artificial-intelligence language robots
60%
+1 −0
The evolution of neon kittens

4 answers  ·  last activity over 4 years ago by Green

biology evolution science-based creature-design earth
60%
+1 −0
Is radar better than visible light in deep space?

8 answers  ·  last activity about 2 months ago by Willk

space light
60%
+1 −0
How feasible would gliders or the like be on a flat plain, with no cliffs to launch from?

6 answers  ·  last activity about 1 month ago by AlexT

science-based technology
60%
+1 −0
What needs to be changed about the plate tectonics of my world?

1 answer  ·  last activity about 1 month ago by devendoo

geography map-making tectonics
60%
+1 −0
biologically or anatomically is there a problem with this type of double mouth or jaws?

5 answers  ·  last activity about 1 month ago by Li Jun

biology reality-check science-based creature-design anatomy
60%
+1 −0
Can a galaxy be formed from a black hole?

3 answers  ·  last activity about 1 month ago by 01e5Dk

space reality-check black-holes galactic
60%
+1 −0
Could my leviathans exist?

1 answer  ·  last activity about 1 month ago by icewar1908

biology reality-check evolution science-based creature-design
60%
+1 −0
Using planetary/stellar media for lasing

1 answer  ·  last activity 4 months ago by Adrian Colomitchi

science-based solar-sails astrophysics
60%
+1 −0
What would happen to a gas giant during a supernova?

2 answers  ·  last activity 4 months ago by Geroditus

astronomy planets science-based physics supernova
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