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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 3 months ago by ‭dmckee‭

physics technology relativity particle-physics
81%
+7 −0
Would a huge amount of asteroids hitting Earth change its rotation speed or destroy the planet?

1 answer  ·  last activity 3 months ago by ‭HDE 226868‭

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

0 answers  ·  last activity 3 months 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 4 months ago by ‭aCVn‭

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

1 answer  ·  last activity 4 months ago by ‭Olin Lathrop‭

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

1 answer  ·  last activity 3 months ago by ‭Cazadorro‭

biology science-based plant animal
75%
+4 −0
Magnet strong enough to rip the iron out of your body feasible?

2 answers  ·  last activity about 1 month ago by ‭DonielF‭

biology magnetism electromagnetism
71%
+3 −0
Restricted Directions for an Alcubierre Drive?

2 answers  ·  last activity 2 months ago by ‭lsusr‭

science-based spaceships science-fiction
71%
+3 −0
Avoiding Incidental Ion Drive damage to Following Vehicles?

2 answers  ·  last activity 2 months ago by ‭dmckee‭

space-travel ion drive
71%
+3 −0
Would a 200-Pound Dwarf Still Need to Wear Clothing?

1 answer  ·  last activity 2 months ago by ‭pnuts‭

biology science-based adaptability humanoid alternate-earth
71%
+3 −0
How do I realistically keep my large mammalian predator hidden from other pack hunters.

3 answers  ·  last activity 17 days ago by ‭Lundin‭

biology creature-design mammals abilities
71%
+3 −0
Wings going from locomotive purposes in juveniles to sexual purposes in adults, plausible?

0 answers  ·  last activity 11 days ago by ‭Lundin‭

evolution sex species
71%
+3 −0
What would the sky view be like of a final stage massive merged galaxy?

1 answer  ·  last activity 4 months ago by ‭HDE 226868‭

astronomy galactic
70%
+5 −1
Why would merfolk have hair?

21 answers  ·  last activity 3 months ago by ‭PinoBatch‭

reality-check evolution creature-design merfolk hair
66%
+2 −0
What if the Planck constant was exactly zero?

3 answers  ·  last activity 4 months ago by ‭HDE 226868‭

physics quantum
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
How do seasons work in a binary system (planet orbits one star, not both)?

5 answers  ·  last activity 3 months ago by ‭Monica Cellio‭

planets science-based stars light
66%
+2 −0
Are geographically typed planets realistic?

5 answers  ·  last activity 3 months ago by ‭aCVn‭

reality-check planets geography
66%
+2 −0
How fast would strange matter conversion go?

1 answer  ·  last activity 3 months 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 4 months ago by ‭HDE 226868‭

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

4 answers  ·  last activity 4 months 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 4 months ago by ‭Mister Onion‭

planets
66%
+4 −1
Black as color of magic

2 answers  ·  last activity 3 months ago by ‭Aliza‭

vision colors
66%
+2 −0
Plausibility of "multi-type transmissible animal cell tumor" to form more complex structures.

0 answers  ·  last activity about 2 months ago by ‭Cazadorro‭

medical animal tumor cell
66%
+2 −0
Could there be something like the Higgs field which gives particles their energy in a similar way to how the Higgs boson gives particles their mass?

1 answer  ·  last activity 4 months ago by ‭HDE 226868‭

science-based physics energy science-fiction quantum
66%
+2 −0
How to make an animal which can only breed for a certain number of generations?

13 answers  ·  last activity about 2 months ago by ‭James Jenkins‭

biology science-based
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 almost 4 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 4 months ago by ‭HDE 226868‭

astronomy stars
60%
+1 −0
Cruelty Free Vampirism [closed]

6 answers  ·  last activity 4 months ago by ‭HDE 226868‭

biology society alternate-history vampires science-fiction
60%
+1 −0
What would be different if a person has broader visual spectrum than normal

2 answers  ·  last activity 4 months ago by ‭Monica Cellio‭

society science-based humans vision
60%
+1 −0
Minimizing the Side Effects of Breathable Outer-Space

16 answers  ·  last activity over 2 years ago by ‭OnyZ‭

space travel science-based physics space-travel
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 almost 3 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 about 1 year 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 almost 2 years 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 could a civilization detect tachyons?

5 answers  ·  last activity over 1 year ago by ‭Cereza‭

space science-based physics communication faster-than-light
60%
+1 −0
Guns in space with bullets that return?

12 answers  ·  last activity over 1 year ago by ‭Greenie E. - Reinstate Monica‭

travel physics space-travel firearms
60%
+1 −0
Using planetary/stellar media for lasing

1 answer  ·  last activity 7 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 7 months ago by ‭Geroditus‭

astronomy planets science-based physics supernova
60%
+1 −0
Anatomically Correct Vanara

2 answers  ·  last activity 4 months ago by ‭TGCF ‭

reality-check evolution science-based creature-design fantasy-races
60%
+1 −0
On our way to Mars: how do we do the laundry?

13 answers  ·  last activity 7 months ago by ‭L.Dutch - Reinstate Monica‭

travel science-based technology space-travel
60%
+1 −0
How would you design Turn-Signals on a Flying Car?

4 answers  ·  last activity 7 months ago by ‭Woodlum Hoodlum‭

spaceships vehicles flying-machines city
60%
+1 −0
Consequences of hitting a Pluto-like planet with a highly luminiferous meteorite?

1 answer  ·  last activity 6 months ago by ‭CAE Jones‭

reality-check planets geology
60%
+1 −0
Could my fungus exist naturally?

1 answer  ·  last activity 6 months ago by ‭RotNDecay‭

biology reality-check science-based fungi
60%
+1 −0
Could power be generated using the temperature difference in venus's atmosphere?

3 answers  ·  last activity 6 months ago by ‭meaninglessname‭

atmosphere energy venus
60%
+1 −0
Procedurally generating a galaxy's worth of names

2 answers  ·  last activity 6 months ago by ‭rek‭

science-based mathematics terminology names
60%
+1 −0
Can the color of an alien sky be calculated solely from atmospheric composition and the star's (or stars') spectral type(s)?

1 answer  ·  last activity 6 months ago by ‭John O‭

atmosphere science-based stars colors
60%
+1 −0
Could ocean and wind currents form on a tidally heated body

0 answers  ·  last activity 6 months ago by ‭Samantha Clark‭

weather reality-check moons
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