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Q&A Which fast STL drive could not be weaponized or results in perpetual motion?

I'm looking for a slower-than-light (STL) drive for fast inter-system travel. It should make trips from one planet of a system to another (e.g. Earth, Mars, Jupiter) with sublight speed possible in...

19 answers  ·  posted 8y ago by Hothie‭  ·  last activity 6y ago by Hothie‭

Question science-fiction