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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
57%
+2 −1
Why would merfolk have hair?

21 answers  ·  last activity 3 days ago by PinoBatch

reality-check evolution creature-design merfolk hair
80%
+6 −0
Would a huge amount of asteroids hitting Earth change its rotation speed or destroy the planet?

1 answer  ·  last activity 3 days ago by HDE 226868

asteroids earth
60%
+1 −0
Are geographically typed planets realistic?

5 answers  ·  last activity 3 days ago by aCVn

reality-check planets geography
60%
+1 −0
Is this planet's atmosphere stable and reasonable, and anything to keep in mind for lifeforms living in it?

3 answers  ·  last activity 3 days ago by aCVn

atmosphere reality-check
66%
+2 −0
Avoiding Incidental Ion Drive damage to Following Vehicles?

0 answers  ·  last activity 4 days ago by Cazadorro

space-travel ion drive
40%
+0 −1
How to explain a mermaid's tail morphing into legs and vice versa?

4 answers  ·  last activity 4 days ago by PinoBatch

underwater merfolk fantasy-races
40%
+0 −1
How to go from a free person to a slave

11 answers  ·  last activity 4 days ago by PinoBatch

science-based psychology slavery
50%
+1 −1
How should I create my Merfolks to make them landbased?

3 answers  ·  last activity 4 days ago by PinoBatch

biology underwater merfolk
40%
+0 −1
Earth where all of Equidae went extinct via Ice Age... - Effects

3 answers  ·  last activity 4 days ago by PinoBatch

reality-check science-based fauna
40%
+0 −1
Does the sun being blocked affect electricity?

6 answers  ·  last activity 4 days ago by PinoBatch

science-based natural-disasters electricity
66%
+2 −0
Restricted Directions for an Alcubierre Drive?

0 answers  ·  last activity 8 days ago by HDE 226868

science-based spaceships science-fiction
50%
+1 −1
3D Printer / Replicator : Raw Materials and Distribution Cables

3 answers  ·  last activity 9 days ago by manassehkatz

science-based technology science-fiction
42%
+1 −2
Oh crap, it's 2020ad, and the Earth is about to explode! Can we make it to the stars?

9 answers  ·  last activity 9 days ago by manassehkatz

apocalypse space-colonization
77%
+5 −0
How efficient can a Dyson sphere be?

0 answers  ·  last activity 9 days ago by HDE 226868

physics dyson-spheres megastructures energy materials
33%
+0 −2
"Life post-Singularity", or "How to survive without Instagram"

14 answers  ·  last activity 11 days ago by wizzwizz4

society computers artificial-intelligence near-future singularity
75%
+4 −0
Competently Mobile Photosynthetic Animal?

1 answer  ·  last activity 12 days ago by Cazadorro

biology science-based plant animal
50%
+1 −1
Can a organism control its metabolism and the heat it's generating?

1 answer  ·  last activity 14 days ago by wizzwizz4

biology xenobiology
81%
+7 −0
Is it possible to create a beam of non-relativistic neutrinos?

1 answer  ·  last activity 19 days ago by dmckee

physics technology relativity particle-physics
66%
+2 −0
How fast would strange matter conversion go?

1 answer  ·  last activity 19 days ago by HDE 226868

science-based physics quantum astrophysics
66%
+4 −1
Black as color of magic

2 answers  ·  last activity 22 days ago by Aliza

vision colors
50%
+0 −0
What would this nebula look like from a planet?

3 answers  ·  last activity 24 days ago by Monica Cellio

science-based stars nebula light
50%
+0 −0
How can I safely brighten my secondary star?

5 answers  ·  last activity 24 days ago by Monica Cellio

science-based stars light
66%
+2 −0
How do seasons work in a binary system (planet orbits one star, not both)?

5 answers  ·  last activity 24 days ago by Monica Cellio

planets science-based stars light
50%
+0 −0
How much does my secondary star heat the planet orbiting my primary star?

3 answers  ·  last activity 24 days ago by Monica Cellio

planets stars
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
60%
+1 −0
Can velocity drift be used to calculate a radio wave source's distance from Earth?

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

astronomy radio
50%
+0 −0
Cruelty Free Vampirism [closed]

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

biology society alternate-history vampires science-fiction
60%
+1 −0
Does crossing a wormhole happen instantaneously, or with the course of time?

2 answers  ·  last activity about 1 month ago by ArtOfCode

science-based wormholes transportation
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
Inverse orbital direction

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

planets orbital-mechanics
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
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 about 1 month ago by HDE 226868

science-based physics energy science-fiction quantum
50%
+0 −0
Why do flying saucers have to spin while flying?

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

spaceships technology aliens flying-machines
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
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
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
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
50%
+0 −0
What could cause Earth to drift out of orbit over a period of months to years?

6 answers  ·  last activity about 1 month ago by aCVn

planets science-based apocalypse 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 can I add to an oxygen/nitrogen atmosphere to make it unpalatable or poisonous to humans, yet stable and breathable to local creatures?

9 answers  ·  last activity about 1 month ago by aCVn

earth-like atmosphere science-based oxygen chemistry
50%
+1 −1
Anatomically Correct Mokèlé-mbèmbé

3 answers  ·  last activity about 1 month ago by aCVn

biology reality-check evolution science-based creature-design
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
Anatomically Correct Vanara

2 answers  ·  last activity about 1 month ago by TGCF

reality-check evolution science-based creature-design fantasy-races
50%
+0 −0
If an ET has caramel blood, what it implies?

1 answer  ·  last activity about 1 month ago by raiden

biology science-based aliens creature-design xenobiology
50%
+0 −0
What organs or modification needed to have tree that gain energy from lightning or electricity?

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

biology science-based flora xenobiology plant-design
50%
+0 −0
Would caves in general be practical lairs for a dragon?

1 answer  ·  last activity about 1 month ago by Mephistopheles

science-based dragons
50%
+0 −0
How could the display technology of self-rewriting books work?

1 answer  ·  last activity about 1 month ago by Mephistopheles

science-based computers robots optics
50%
+0 −0
Cons of Antimatter Weaponry

6 answers  ·  last activity about 1 month ago by Dawnfire

science-based antimatter power-sources weapon-mass-destruction science-fiction
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
50%
+0 −0
Exclusively underground creature experiencing sun-light for the first-time

3 answers  ·  last activity about 1 month ago by Prahara

biology reality-check xenobiology
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