User Alexander

129 votes

Accepted

How could a planet have a sky without stars at night?

answered Jan 2, 2019 at 22:13

116 votes

If a large space ship crashes on a planet, what could kill passengers without obliterating the ship?

technology planets physics environment

answered Jul 26, 2018 at 17:44

111 votes

Why might the dystopian government make its policemen patrol in fours?

dystopia law-enforcement

answered Aug 20, 2018 at 23:26

88 votes

How can you weaponize a thermos?

weapons zombies

answered Nov 20, 2019 at 22:57

84 votes

How can a Dragon keep humanity in check?

humans dragons

answered Jan 16, 2018 at 0:45

78 votes

How would primitive peoples detect radiation?

technology post-apocalypse radiation

answered Jun 25, 2018 at 20:59

66 votes

Accepted

How do I have a Dictatorship keep its dictator out of international headlines?

politics information

answered Jul 3, 2017 at 18:38

66 votes

Dungeons for Real: 1. The Bottomless Pit

technology earth architecture dungeons

answered Feb 2, 2021 at 0:49

60 votes

Accepted

If 120 experts in 12 different fields were sent back 10,000 years, could they recreate the 21st century in 100 years?

internal-consistency technological-development time-travel

answered Oct 15, 2019 at 18:57

53 votes

Tactics and strategy an army can use to counter Human Wave attacks?

warfare near-future military military-defense tactics

answered May 21, 2018 at 2:06

53 votes

What modern-day object could a magic wand be disguised as?

magic urban-fantasy concealment

answered Apr 20 at 17:31

52 votes

How would an astronaut conclude he's on Earth, but 600 million years in the future?

biology space astronomy far-future

answered Jun 17, 2017 at 0:22

52 votes

How to prevent criminal gangs from making/buying guns?

society weapons modern-age crime

answered Aug 14, 2019 at 17:27

48 votes

Is there such thing as a "one-person" door?

science-based medieval

answered Oct 2, 2018 at 0:13

46 votes

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How would people detect a 1 year time jump between star systems?

science-based astronomy

answered Nov 16, 2021 at 8:21

36 votes

What manner of weapons and armor would be suitable for freezing conditions in the middle ages?

warfare weapons weather middle-ages

answered Jul 12, 2018 at 18:05

34 votes

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How long will it take to discover they live on a moon and not on a planet?

science-based astronomy alternate-reality

answered Sep 20, 2018 at 18:10

34 votes

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What should a god put on an island, so that its human settlers will more quickly achieve an industrialised society?

society technological-development

answered Jan 3, 2020 at 18:10

33 votes

How can I justify an Iron monopoly?

culture metals trade bronze-age

answered Jan 12 at 17:43

32 votes

Would trams be workable on a low-gravity world?

science-based gravity vehicles

answered Mar 14, 2018 at 23:44

30 votes

Accepted

Would building a Dyson sphere inside the Earth's orbit render our planet uninhabitable?

science-based biology space dyson-spheres

answered Feb 14, 2017 at 18:16

30 votes

A subset of humanity is immortal, how do I stop them from financially dominating?

immortality finances

answered Oct 20, 2021 at 15:54

29 votes

Assassin's bullet with mercury

science-based chemistry assassination

answered Apr 3, 2019 at 17:46

28 votes

Could people in a post-apocalyptic setting work around the fact that fuel expires?

science-based post-apocalypse

answered Aug 31, 2017 at 17:11

26 votes

Always a full Moon for the Emperor - Can this be achieved with solar panels and LEDs?

science-based moons light

answered Nov 30, 2018 at 1:32

26 votes

Accepted

Is there a clever one-letter code to describe worlds?

worldbuilding-process

answered Jan 21, 2019 at 19:52

26 votes

Why would a berry have a slow-acting poison?

environment food natural-defenses

answered Nov 20, 2019 at 23:23

25 votes

Would blue-collar jobs still be done by people in a scifi setting?

technology science-fiction far-future

answered Jul 22, 2021 at 21:47

25 votes

What non-electrical, basic tool from today, could be made that would change the world in ancient times?

internal-consistency economy ancient-history tools

answered Jul 17, 2020 at 21:55

24 votes

Why does this one planet still have slaves?

economy slavery

answered May 8, 2018 at 18:09

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619 Answers

How could a planet have a sky without stars at night?

If a large space ship crashes on a planet, what could kill passengers without obliterating the ship?

Why might the dystopian government make its policemen patrol in fours?

How can you weaponize a thermos?

How can a Dragon keep humanity in check?

How would primitive peoples detect radiation?

How do I have a Dictatorship keep its dictator out of international headlines?

Dungeons for Real: 1. The Bottomless Pit

If 120 experts in 12 different fields were sent back 10,000 years, could they recreate the 21st century in 100 years?

Tactics and strategy an army can use to counter Human Wave attacks?

What modern-day object could a magic wand be disguised as?

How would an astronaut conclude he's on Earth, but 600 million years in the future?

How to prevent criminal gangs from making/buying guns?

Is there such thing as a "one-person" door?

How would people detect a 1 year time jump between star systems?

What manner of weapons and armor would be suitable for freezing conditions in the middle ages?

How long will it take to discover they live on a moon and not on a planet?

What should a god put on an island, so that its human settlers will more quickly achieve an industrialised society?

How can I justify an Iron monopoly?

Would trams be workable on a low-gravity world?

Would building a Dyson sphere inside the Earth's orbit render our planet uninhabitable?

A subset of humanity is immortal, how do I stop them from financially dominating?

Assassin's bullet with mercury

Could people in a post-apocalyptic setting work around the fact that fuel expires?

Always a full Moon for the Emperor - Can this be achieved with solar panels and LEDs?

Is there a clever one-letter code to describe worlds?

Why would a berry have a slow-acting poison?

Would blue-collar jobs still be done by people in a scifi setting?

What non-electrical, basic tool from today, could be made that would change the world in ancient times?

Why does this one planet still have slaves?