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jeezlyCurmudgeon t1_iy7yb5t wrote

Watch the expanse. Minus the alien bit it's a very believable future society.

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Harbinger2001 t1_iy8a6nr wrote

Also minus the insanely efficient drives. Real propulsion would make most of that society infeasible.

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Khrontek t1_iy8el95 wrote

Even without Epstein drives there were the less efficient torch engines which are in the books and came before the Epstein. Humans had access to those engines to colonize Mars and the start of the belt I believe (Finishing up Leviathan Wakes currently). Even today NASA has researched and experimented with NERVA which is a nuclear rocket engine design. They also recently from my knowledge spun that research back up so maybe we will see this new engine in space in the near future.

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