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- 79 How can an average person prepare themselves to verify their future time-traveler self's identity?
- 51 Putting Ant-Man on house arrest
- 35 Earth becomes a rogue planet - how long can Iceland hold out?
- 32 Benefits of time-traveling back to the late Cretaceous period? Economic/financial, resource extraction etc
- 29 Prolonging a siege indefinitely by tunneling
- 24 An Eden-like moon orbits a barren terrestrial planet. Why is the planet barren while its moon is earthlike?
- 24 An object that is gold in one specific area but becomes worthless if you leave that area?
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