Scientific Speculation

83%

+8 −0

Is it realistic to see satellites moving across the sky centuries after humans stopped space activity?

1 answer · posted almost 2 years ago by celtschk‭ · last activity almost 2 years ago by Green‭

space satellites

81%

+7 −0

Why would a race constantly deafened by ambient noises still hear?

3 answers · posted almost 2 years ago by DonielF‭ · last activity over 1 year ago by ajekb78‭

evolution senses abilities

81%

+7 −0

Would a huge amount of asteroids hitting Earth change its rotation speed or destroy the planet?

1 answer · posted 2y ago by hkotsubo‭ · last activity 2y ago by HDE 226868‭

asteroids earth

81%

+7 −0

Is it possible to create a beam of non-relativistic neutrinos?

1 answer · posted over 2 years ago by HDE 226868‭ · last activity over 2 years ago by dmckee‭

physics technology relativity particle-physics

80%

+6 −0

Could a habitable planet lit by the cosmic microwave background plausibly exist?

1 answer · posted over 1 year ago by celtschk‭ · last activity over 1 year ago by dsr‭

planets alternate-worlds habitability

80%

+6 −0

Centripetal Burn in Orbit

1 answer · posted over 1 year ago by Josh Hyatt‭ · last activity over 1 year ago by Olin Lathrop‭

space orbital-mechanics

80%

+6 −0

How do you establish identity when people can change their appearance at will?

3 answers · posted almost 2 years ago by Green‭ · last activity over 1 year ago by Pastychomper‭

genetics identity governance

80%

+6 −0

Magnet strong enough to rip the iron out of your body feasible?

2 answers · posted 2y ago by Cazadorro‭ · last activity 2y ago by DonielF‭

biology magnetism electromagnetism

80%

+6 −0

How efficient can a Dyson sphere be?

1 answer · posted 2y ago by HDE 226868‭ · last activity almost 2 years ago by celtschk‭

physics dyson-spheres megastructures energy materials

77%

+5 −0

Could a high-pressure, low oxygen atmosphere reduce fire risk while still being breathable?

1 answer · posted 7mo ago by Pastychomper‭ · last activity 7mo ago by dsr‭

atmosphere fire physiology pressure

77%

+5 −0

Could grow lights on a massive scale replace 100% of sunlight for 100% of the growing season?

2 answers · posted 1y ago by JBH‭ · last activity 1y ago by KalleMP‭

agriculture light

77%

+5 −0

Composite armor based on diamonds, could it work?

1 answer · posted over 1 year ago by Mr. Mistoffelees‭ · last activity over 1 year ago by Olin Lathrop‭

armors nanotechnology

77%

+5 −0

What conditions would cause an extremely dense (dark) coniferous forest to grow?

1 answer · posted over 2 years ago by xtal‭ · last activity over 2 years ago by Olin Lathrop‭

climate forestry ecology

77%

+5 −0

What Factors Could Cause a World to See "Northern" Lights Much Closer to the Equator?

4 answers · posted 8y ago by Liath‭ · last activity over 2 years ago by Canina‭

astronomy atmosphere

75%

+4 −0

How to reduce tornados in the US Great Plains?

1 answer · posted 19d ago by Aaron‭ · last activity 15d ago by Olin Lathrop‭

weather alternate-earth

75%

+4 −0

How do I realistically keep my large mammalian predator hidden from other pack hunters.

3 answers · posted 2y ago by Cazadorro‭ · last activity 2y ago by Lundin‭

biology creature-design mammals abilities

75%

+4 −0

Avoiding Incidental Ion Drive damage to Following Vehicles?

1 answer · posted 2y ago by Cazadorro‭ · last activity 2y ago by dmckee‭

space-travel ion drive

75%

+4 −0

Competently Mobile Photosynthetic Animal?

1 answer · posted over 2 years ago by Cazadorro‭ · edited over 2 years ago by Cazadorro‭

biology plant animal

75%

+4 −0

Restricted Directions for an Alcubierre Drive?

1 answer · posted over 2 years ago by FlyingLemmingSoup‭ · last activity 2y ago by lsusr‭

spaceships science-fiction

75%

+4 −0

How would an interstellar spaceship's speedometer work if everything else is moving?

12 answers · posted almost 7 years ago by user6760‭ · last activity 1y ago by celtschk‭

space travel space-travel transportation transport

72%

+6 −1

Why would merfolk have hair?

21 answers · posted over 6 years ago by Uncle Tres‭ · last activity 2y ago by PinoBatch‭

reality-check evolution creature-design merfolk hair

71%

+3 −0

Price's Law Sanity Check

1 answer · posted 2mo ago by James McLellan‭ · last activity 21d ago by dsr‭

society economy

71%

+3 −0

What are the Ground Effects of the South Atlantic Anomaly?

0 answers · posted 3mo ago by James McLellan‭ · edited 3mo ago by James McLellan‭

magnetism earth navigation

71%

+3 −0

How to protect intelligent fluids from heat damage?

2 answers · posted over 1 year ago by Mr. Mistoffelees‭ · edited over 1 year ago by Canina‭

physics robots

71%

+3 −0

Is the Caspian Sea becoming smaller since the industrial revolution?

0 answers · posted over 1 year ago by deleted user · edited over 1 year ago by deleted user

sea climate-change pre-industrial industrial-age

71%

+3 −0

How do I manage memetic infection while time traveling?

2 answers · posted almost 2 years ago by Green‭

time-travel information

71%

+3 −0

Plausibility of "multi-type transmissible animal cell tumor" to form more complex structures.

2 answers · posted 2y ago by Cazadorro‭ · last activity over 1 year ago by sox‭

medical animal tumor cell

71%

+3 −0

Would a 200-Pound Dwarf Still Need to Wear Clothing?

1 answer · posted 2y ago by Enfield‭ · last activity 2y ago by pnuts‭

biology adaptability humanoid alternate-earth

71%

+3 −0

What would the sky view be like of a final stage massive merged galaxy?

1 answer · posted over 2 years ago by RandySavage‭ · last activity over 2 years ago by HDE 226868‭

astronomy galactic

71%

+3 −0

How to make an animal which can only breed for a certain number of generations?

13 answers · posted over 3 years ago by Richard Smith‭ · last activity 2y ago by James Jenkins‭

biology

66%

+2 −0

High-Energy Exhaust Shielding for Far-Future Drive

1 answer · posted 8mo ago by Josh Hyatt‭ · last activity 4mo ago by James McLellan‭

space-travel far-future

66%

+4 −1

Could a laser using a "light capacitor" rather than a battery work?

1 answer · posted 1y ago by pootis‭ · last activity 1y ago by Olin Lathrop‭

weapons warfare laser

66%

+2 −0

How would utility fluids move and stay together?

1 answer · posted over 1 year ago by Mr. Mistoffelees‭ · edited over 1 year ago by Canina‭

nanotechnology robots hydrodynamics

66%

+4 −1

Wings going from locomotive purposes in juveniles to sexual purposes in adults, plausible?

0 answers · posted 2y ago by caters‭ · edited 2y ago by Lundin‭

evolution sex species

66%

+4 −1

Black as color of magic

2 answers · posted over 2 years ago by Prahara‭ · last activity over 2 years ago by Aliza‭

vision colors

66%

+2 −0

How large would be the habitable area in a tidally locked planet?

2 answers · posted over 2 years ago by Mister Onion‭ · last activity over 2 years ago by Mister Onion‭

planets

66%

+2 −0

Do seasons occur on a tidally-locked planet?

4 answers · posted over 2 years ago by Mister Onion‭ · last activity over 2 years ago by HDE 226868‭

astronomy planets seasons astrophysics tidally-locked

66%

+2 −0

Is a genetically modified human with a much higher height plausible?

3 answers · posted over 2 years ago by Popplio Lover‭ · last activity almost 2 years ago by Razetime‭

evolution humans

66%

+2 −0

How long would a planet that losses its gravity take to break up?

1 answer · posted over 2 years ago by Dave Driver‭ · last activity over 2 years ago by HDE 226868‭

physics gravity science-fiction

66%

+2 −0

How fast would strange matter conversion go?

1 answer · posted over 2 years ago by Nierninwa‭ · last activity over 2 years ago by HDE 226868‭

physics quantum astrophysics

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 · posted over 2 years ago by Aeroan‭ · last activity over 2 years ago by HDE 226868‭

physics energy science-fiction quantum

66%

+2 −0

Would there be any major disadvantages for a species to have six legs instead of four?

13 answers · posted 4y ago by Canina‭ · edited over 1 year ago by Canina‭

evolution creature-design

66%

+2 −0

What is the most efficent way of killing prey much larger than yourself?

14 answers · posted 4y ago by SealBoi‭ · last activity 1y ago by KalleMP‭

biology fauna

66%

+2 −0

How can the Hertzsprung-Russell diagram be used in star building?

3 answers · posted 4y ago by Sam Coutteau‭ · edited over 2 years ago by HDE 226868‭

astronomy stars

66%

+2 −0

Exploration of a 50 mile high mountain

6 answers · posted almost 5 years ago by Green‭ · edited over 1 year ago by Canina‭

space technology exploration

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 · posted almost 6 years ago by Canina‭ · last activity almost 6 years ago by Canina‭

astronomy planets earth

66%

+2 −0

The evolution of neon kittens

5 answers · posted over 6 years ago by Green‭ · last activity over 6 years ago by Green‭

biology evolution creature-design earth

66%

+2 −0

What if the Planck constant was exactly zero?

3 answers · posted almost 7 years ago by Anders Gustafson‭ · last activity over 2 years ago by HDE 226868‭

physics quantum

66%

+2 −0

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

5 answers · posted 7y ago by Monica Cellio‭ · edited over 2 years ago by Monica Cellio‭

planets stars light

66%

+2 −0

Interstellar internet use cases, or "What if the internet was mail-order?"

5 answers · posted over 7 years ago by AdamHovorka‭ · last activity over 7 years ago by AdamHovorka‭

space internet

Communities