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Can we build a 3D maneuver gear from Attack on Titan?
weapons - What would it be like to use a vibro-blade
Weighted Clothes In A Low Gravity Environment
space - How to make a Stanford torus start rotating?
Why Would Adventurers and Mages Wear Impractical Clothing?
What animal would make the best centaur
genetically engineered humans breathe underwater at extreme …
Weapons and armor from chitin - Worldbuilding Stack Exchange
How could there be underwater thriving city in the medieval age?
Could a ion thruster work in atmosphere with enough energy?