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- 52 Security measures that could plausibly last 150+ years?
- 40 What reason would an alien civilization have for building a Dyson Sphere (or Swarm) if cheap Nuclear fusion is available?
- 38 How to give a rationality-inducing drug to an entire software company?
- 35 Is it idiomatic to say "could only be used"?
- 32 What would cause a nuclear power plant to break down after 2000 years, but not sooner?
- 27 Would a spacecraft carry arc welding supplies?
- 24 How would one create an effective basketball and soccer ball in medieval Europe?
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