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- 37 Science fiction book cover with man looking up at floating black rectangular "ships" in sky?
- 37 How does an ordinary person announce major discoveries?
- 16 Which fast STL drive could not be weaponized or results in perpetual motion?
- 16 Conquering a Metropolis with near-zero own casualties
- 14 What would make scientists realize their planetary system is inside a hollow sphere?
- 13 Convert radioactivity directly into electricity: Possible or not?
- 13 Fantasy/Medieval setting - materials to build when wood and stone aren't an option?
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