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8 votes
18 answers
3k views

How do I stop people from creating artificial islands using the magic particles that suspend my floating islands?

5 votes
7 answers
446 views

Speaker-Powered Directed Blast Weapon

0 votes
2 answers
133 views

Biological Electroreception/Electrogenesis (Electrolocation) In Air Medium

3 votes
3 answers
84 views

Accelerated Metabolism Thermal Sensation

1 vote
1 answer
90 views

Hot Jupiter L2 Station! Reasons to build, and challenges

6 votes
7 answers
800 views

how might look and be used the firearm hand weapon for four-handed humanoids?

0 votes
4 answers
112 views

What is the most plausible way for a neuralchip to be invented in a post-apocalyptic society?

2 votes
5 answers
249 views

How to significantly slow/stop computer development from advancing past the early 1990s?

15 votes
11 answers
6k views

What could a technologically lesser civilization sell to a more technologically advanced one?

-2 votes
1 answer
142 views

Fire Planet as a light/heat source for my planets

5 votes
4 answers
238 views

Where would an interstellar society mine phosphorous and rare earth metals?

8 votes
8 answers
2k views

What is the best engine type for linear acceleration?

3 votes
2 answers
260 views

How could a human develop magenta irises?

5 votes
1 answer
148 views

At what point do you release aircraft from an orbital lander

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