User MichaelK

243 votes

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How to safely check if you are immortal?

answered Oct 6, 2017 at 9:40

120 votes

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What do you do with all the bodies?

answered Dec 5, 2016 at 16:02

83 votes

A poison that only works if you know it is there

answered Jun 13, 2017 at 13:01

82 votes

Infantry weapons, or why are there people running around down there anyway?

answered Aug 28, 2017 at 18:08

81 votes

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How do I explain that an interstellar spaceship still requires risky spacewalks?

answered Oct 17, 2017 at 14:22

80 votes

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Reasons for my dark ages world to have no horses at all

answered Oct 10, 2017 at 13:58

79 votes

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How would a medieval city get cold drinks?

answered Sep 25, 2017 at 8:51

73 votes

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Is it plausible for self-destruct button to trigger a countdown?

answered Sep 26, 2017 at 6:37

72 votes

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Would a non-lethal military be effective?

answered Dec 20, 2018 at 11:32

65 votes

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Uranium block house heating

answered Feb 16, 2018 at 11:30

64 votes

What kind of a unit/army would prefer fighting from a low ground position?

answered Sep 14, 2018 at 12:52

57 votes

How to tell a clone apart?

answered Sep 22, 2016 at 8:00

55 votes

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What would the effect be on Earth if Mars disappeared?

answered Aug 3, 2016 at 10:39

49 votes

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Advantages of an electrified sword?

answered Aug 16, 2016 at 13:09

45 votes

How do we tell if we're living in a virtual reality world?

answered Aug 3, 2016 at 13:14

43 votes

How to keep a military technology secret while using it?

answered May 9, 2017 at 9:29

42 votes

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Hallway cannon, the last way out

answered Apr 5, 2017 at 7:55

42 votes

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Explosives in the Middle Ages

answered Jun 22, 2016 at 20:53

41 votes

Why did dragons evolve to be smart?

answered Dec 16, 2016 at 14:17

40 votes

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Dropping ice in the ocean to stop global warming

answered Dec 9, 2016 at 11:33

38 votes

Zero Emission Tanks

answered Oct 4, 2016 at 8:52

38 votes

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How to explain human life expectancy increase?

answered Oct 18, 2017 at 13:57

37 votes

How can a mortal woman successfully carry a demigod to term?

answered Jan 10, 2019 at 16:23

36 votes

Using Polonium in a WMD

answered Mar 5, 2017 at 17:30

35 votes

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A society without law enforcement?

answered Mar 23, 2016 at 11:18

34 votes

Can singularity be achieved in a PC without any external information?

answered Sep 14, 2016 at 12:18

34 votes

What might stop people from destroying navigation satellites that are used for FTL plotting?

answered Sep 7, 2021 at 12:06

33 votes

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What Could Cause Humans To Fracture Into Many Multiple Species?

answered Oct 22, 2017 at 1:14

33 votes

What could cause a culture to change their writing style?

answered Feb 14, 2017 at 13:36

32 votes

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How can I locate myself in a random point of space?

answered Aug 29, 2018 at 11:57

Stack Exchange Network

442 Answers

How to safely check if you are immortal?

What do you do with all the bodies?

A poison that only works if you know it is there

Infantry weapons, or why are there people running around down there anyway?

How do I explain that an interstellar spaceship still requires risky spacewalks?

Reasons for my dark ages world to have no horses at all

How would a medieval city get cold drinks?

Is it plausible for self-destruct button to trigger a countdown?

Would a non-lethal military be effective?

Uranium block house heating

What kind of a unit/army would prefer fighting from a low ground position?

How to tell a clone apart?

What would the effect be on Earth if Mars disappeared?

Advantages of an electrified sword?

How do we tell if we're living in a virtual reality world?

How to keep a military technology secret while using it?

Hallway cannon, the last way out

Explosives in the Middle Ages

Why did dragons evolve to be smart?

Dropping ice in the ocean to stop global warming

Zero Emission Tanks

How to explain human life expectancy increase?

How can a mortal woman successfully carry a demigod to term?

Using Polonium in a WMD

A society without law enforcement?

Can singularity be achieved in a PC without any external information?

What might stop people from destroying navigation satellites that are used for FTL plotting?

What Could Cause Humans To Fracture Into Many Multiple Species?

What could cause a culture to change their writing style?

How can I locate myself in a random point of space?