User Samwise - Worldbuilding Stack Exchange

44 votes

Can guns be rendered unusable by changing the atmosphere?

answered Nov 17, 2016 at 21:09

28 votes

Accepted

What would justify the use of homing pigeons in a world where sending digital messages is a viable option?

answered Oct 19, 2023 at 22:12

23 votes

Will interplanetary shipping even be necessary in a future with nanofabricators?

answered Nov 26, 2016 at 20:22

15 votes

Scientifically plausible way to sink a landmass

answered Jul 20, 2022 at 0:54

11 votes

What would be some ways to store heat / cold?

answered Dec 25, 2016 at 23:03

10 votes

A Non-Iron Elvish Steel

answered Jun 28, 2017 at 0:10

9 votes

Extremely compact nuclear reactor?

answered Dec 31, 2016 at 21:24

9 votes

Would a terraformed planet have no fossil fuels and if so, what alternates would be available?

answered 2 days ago

8 votes

pressure differences and stargates

answered Sep 27, 2016 at 0:01

7 votes

Accepted

Is there a substance that passes through gasses, but reacts violently (explosive) when confronted with solid matter?

answered Sep 19, 2025 at 0:27

6 votes

Emitting a particle beam within the atmosphere

answered Aug 6, 2020 at 23:58

5 votes

Would inflating hot spheres of metal be a viable zero-g, vacuum ship-building technique?

answered Jul 12, 2020 at 0:12

4 votes

Which Non-Iron Elvish Steel Would Make A Good Stonecutting Tool?

answered Sep 4, 2021 at 1:03

4 votes

Theoretically, could infrared radiation be focused into a accurate enough beam to be used as a weapon on mechs?

answered Feb 20, 2025 at 22:00

4 votes

Accepted

Does my ferrofluid party trick make sense?

answered Nov 8, 2016 at 22:11

4 votes

How fast can heat be carried away from a small source?

answered Dec 10, 2016 at 23:29

3 votes

A power source that would last a REALLY long time

answered Oct 11, 2016 at 0:52

3 votes

How would the Death Star laser really work?

answered Dec 27, 2016 at 21:15

3 votes

How could a planet have plate tectonics but zero or weak earthquakes?

answered Jun 7, 2017 at 11:31

3 votes

Computing technology in a world with only Gold, Copper, and Silver

answered Oct 31, 2023 at 22:14

2 votes

How easily could a pre-scientific people purify a substance and hence grow a pure crystal?

answered Mar 6, 2024 at 0:28

2 votes

Possible real life applications for producing artificial aurora?

answered Dec 4, 2021 at 22:33

2 votes

How far could a maglev elevator travel in two hours?

answered Jan 24, 2017 at 7:34

2 votes

Accepted

Can Global warming be counteracted by building a plant which creates Cirrus Clouds?

answered Oct 6, 2016 at 23:33

1 vote

How can I keep the computers on my spaceship from temperature related death after a hull breach?

answered Dec 20, 2016 at 22:52

1 vote

Humans Achieve Massive Increase In Average IQs -- But How?

answered Dec 20, 2016 at 23:20

1 vote

Effects of inertia dampener technology

answered Jan 9, 2017 at 23:20

1 vote

Plausible propulsion methods given a virtually infinite electric power source

answered Apr 14, 2020 at 1:01

1 vote

How could a man-portable EMP shotgun generate a pulse?

answered Feb 12, 2023 at 22:03

-2 votes

Could a mathematical constant actually change?

answered Jan 7, 2018 at 19:58

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30 Answers

Can guns be rendered unusable by changing the atmosphere?

What would justify the use of homing pigeons in a world where sending digital messages is a viable option?

Will interplanetary shipping even be necessary in a future with nanofabricators?

Scientifically plausible way to sink a landmass

What would be some ways to store heat / cold?

A Non-Iron Elvish Steel

Extremely compact nuclear reactor?

Would a terraformed planet have no fossil fuels and if so, what alternates would be available?

pressure differences and stargates

Is there a substance that passes through gasses, but reacts violently (explosive) when confronted with solid matter?

Emitting a particle beam within the atmosphere

Would inflating hot spheres of metal be a viable zero-g, vacuum ship-building technique?

Which Non-Iron Elvish Steel Would Make A Good Stonecutting Tool?

Theoretically, could infrared radiation be focused into a accurate enough beam to be used as a weapon on mechs?

Does my ferrofluid party trick make sense?

How fast can heat be carried away from a small source?

A power source that would last a REALLY long time

How would the Death Star laser really work?

How could a planet have plate tectonics but zero or weak earthquakes?

Computing technology in a world with only Gold, Copper, and Silver

How easily could a pre-scientific people purify a substance and hence grow a pure crystal?

Possible real life applications for producing artificial aurora?

How far could a maglev elevator travel in two hours?

Can Global warming be counteracted by building a plant which creates Cirrus Clouds?

How can I keep the computers on my spaceship from temperature related death after a hull breach?

Humans Achieve Massive Increase In Average IQs -- But How?

Effects of inertia dampener technology

Plausible propulsion methods given a virtually infinite electric power source

How could a man-portable EMP shotgun generate a pulse?

Could a mathematical constant actually change?