Could a vacuum airship be possible?
97881
Beryllium Vacuum Sphere Boat/Aircraft
155629
Would a wormhole be able to move?
117884
Why isn't perpetual motion possible, even though we are so technologically advanced?
78312
Can I levitate an object without using an electromagnet?
82377
Is it possible to produce gravitational waves artificially?
121756
Could a ship equipped with Alcubierre drive theoretically escape from a black hole?
2657
Can energy be taken out of the QFT vacuum?
31246
How much thrust would be needed to turn a hobbyist weather balloon into a deep space probe?
92591
Could a Dyson Sphere-like object be made to encase a black hole without collapsing?
81076
Can flying creatures choose to hover, even if they don't have hover in their flying speed?
7332
Is the double-slit experiment typically carried out in a vacuum?
35121
Can a permanent Teleportation Circle be made on a moving vehicle?
120596
Do atmospheric physics prevent hot air balloons from ascending over 60,000ft?
155652
What are the calculations for Vacuum Energy?
9303
A water pipe from sea level to beyond the atmosphere
105323
Why can't gravitons be created in traditional particle accelerators?
80441
How to Create Dust Floating in the Air?