Can we build a space tower out of ICE?
62773
How wide does a wall of ice need to be to stay in place?
39464
How can I build a model out of hexagons? (honeycomb effect)
13452
Can low-gravity planets sustain a breathable atmosphere?
115222
How can I get a specific Floor in my Tower?
117190
Can space be torn?
114257
Balloons and lifting gases
97881
Beryllium Vacuum Sphere Boat/Aircraft
14898
Kerbal Space Program - Can I transfer Parts to another in-orbit vessel?
84062
The Time Freezing Room - Theoretically possible?
57646
2D solidify. Is it possible?
11655
Building a wormhole
136977
Is there any anti-gravity material?
146101
Floating in a Dyson Sphere
18827
Would a fast interstellar spaceship benefit from an aerodynamic shape?
64989
Falling space debris defence systems in the Star wars universe
36249
Why don't they just replicate ships instead of build them?
137177
Do magnets work in outer space?