User Zeiss Ikon

94 votes

How many generations would it take until the noble and peasant classes become different species and cannot interbreed?

answered Jan 20, 2020 at 18:50

69 votes

If it wasn't maintained for hundreds of years, would the Channel Tunnel collapse?

civilization future

answered Jan 27, 2020 at 17:26

68 votes

Accepted

Teleportation is invented but it has nasty side-effects % of the time, how will that affect usage of the technology?

technology technological-development teleportation

answered Oct 29, 2019 at 14:22

66 votes

Are there examples of rowers who also fought?

internal-consistency military history

answered Jun 14, 2019 at 18:39

62 votes

How many years before enough atoms of your body are replaced to survive the sudden disappearance of the original body’s atoms?

science-based anatomy death illusion

answered Aug 6, 2019 at 12:09

61 votes

Why is dwarfism considered an advantage for jobs in space?

society space-travel dwarfism

answered Dec 6, 2019 at 19:16

58 votes

How might a landlocked lake become a complete ecosystem?

internal-consistency biology geography water-bodies

answered May 13, 2019 at 16:04

51 votes

How could humans reach distant stars and still stay as a united government if you can't use faster than light travel

science-fiction space space-colonization

answered Feb 26, 2020 at 20:24

48 votes

What would a corpse of a person who drowned in mercury look like?

medicine death crime poisons

answered Feb 14, 2020 at 13:13

48 votes

Accepted

Would you notice, visually, if the planet you were on was vastly larger than Earth?

geography mathematics

answered Jan 23, 2020 at 13:27

48 votes

Accepted

Rural broomstick navigation on a moonless night

answered Oct 8, 2021 at 13:52

46 votes

Accepted

Could a 19.25mm revolver actually exist?

internal-consistency technology physics weapons engineering

answered May 23, 2019 at 14:50

46 votes

Accepted

Lighthouse Alternatives

physics environment communication engineering victorian-era

answered Sep 25, 2019 at 12:10

40 votes

How to tell a blackhole from a neutron star covered entirely by Dyson sphere painted in vantablack?

science-based technology black-holes dyson-spheres

answered Dec 30, 2019 at 19:24

37 votes

Would near-lightspeed spaceships have an aerodynamic shape?

space-travel spaceships

answered Mar 12, 2020 at 19:19

35 votes

The best realistic spell to brick firearms

science-based nanotechnology firearms

answered Dec 23, 2019 at 20:10

34 votes

Would it ever be possible to restore the data currently on the internet if the internet were to totally shut down?

internet data-storage

answered Dec 17, 2021 at 17:26

34 votes

Is speed of a ship limited by its propellers or the engine

engineering materials metals engines

answered May 18 at 16:35

32 votes

Can an asteroid go through the sun?

science-based space asteroids sun

answered Jul 1, 2021 at 18:46

32 votes

Would coating a space ship in liquid nitrogen mask its thermal signature?

space-travel spaceships stealth

answered Jan 19, 2021 at 15:45

32 votes

Why limit to revolvers?

science-fiction gravity firearms

answered Jul 13, 2019 at 15:37

28 votes

Of strange atmospheres - the survivable but unbreathable

biology earth-like hard-science atmosphere

answered May 21, 2019 at 15:55

27 votes

Accepted

Cooling Question: How can I integrate a low tech freezing system into my world?

technology temperature ice preservation

answered Jul 7, 2021 at 17:50

26 votes

Accepted

Are there any medieval light sources without fire?

magic medieval light medieval-europe fire

answered Jul 9, 2019 at 17:53

25 votes

Can an escape pod land on Earth from orbit and not be immediately detected?

science-based space spaceships stealth

answered Jun 11, 2019 at 18:21

25 votes

Does water in vacuum form a solid shell or freeze solid?

internal-consistency science-fiction physics water vacuum

answered May 20, 2019 at 19:27

24 votes

How easily can a medieval granary explode?

internal-consistency medieval agriculture fire explosions

answered May 29, 2020 at 12:45

23 votes

Accepted

Why would a 'first world' alien opt to have a brood of dumb children rather than one smart one?

society reproduction

answered Mar 24, 2020 at 12:10

23 votes

Accepted

What would a Rainbow look like on an earth-like Planet orbiting a Red Sun?

planets space stars light

answered Oct 26, 2020 at 18:30

23 votes

Are Geologically Dead Planets Habitable?

internal-consistency planets solar-system habitability

answered Mar 3, 2020 at 18:28

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442 Answers

How many generations would it take until the noble and peasant classes become different species and cannot interbreed?

If it wasn't maintained for hundreds of years, would the Channel Tunnel collapse?

Teleportation is invented but it has nasty side-effects % of the time, how will that affect usage of the technology?

Are there examples of rowers who also fought?

How many years before enough atoms of your body are replaced to survive the sudden disappearance of the original body’s atoms?

Why is dwarfism considered an advantage for jobs in space?

How might a landlocked lake become a complete ecosystem?

How could humans reach distant stars and still stay as a united government if you can't use faster than light travel

What would a corpse of a person who drowned in mercury look like?

Would you notice, visually, if the planet you were on was vastly larger than Earth?

Rural broomstick navigation on a moonless night

Could a 19.25mm revolver actually exist?

Lighthouse Alternatives

How to tell a blackhole from a neutron star covered entirely by Dyson sphere painted in vantablack?

Would near-lightspeed spaceships have an aerodynamic shape?

The best realistic spell to brick firearms

Would it ever be possible to restore the data currently on the internet if the internet were to totally shut down?

Is speed of a ship limited by its propellers or the engine

Can an asteroid go through the sun?

Would coating a space ship in liquid nitrogen mask its thermal signature?

Why limit to revolvers?

Of strange atmospheres - the survivable but unbreathable

Cooling Question: How can I integrate a low tech freezing system into my world?

Are there any medieval light sources without fire?

Can an escape pod land on Earth from orbit and not be immediately detected?

Does water in vacuum form a solid shell or freeze solid?

How easily can a medieval granary explode?

Why would a 'first world' alien opt to have a brood of dumb children rather than one smart one?

What would a Rainbow look like on an earth-like Planet orbiting a Red Sun?

Are Geologically Dead Planets Habitable?