Reliable space travel is slightly elusive. Sure, we have a few rocket systems that can take people up to low Earth orbit, but there's always the chance that those rockets will fail and explode in the sky. On top of that, re-usable rockets haven't quite lived up to their promised cost effectiveness, though some progress is being made on that front. A space elevator
could provide a nice alternative, obviating the need for explosive chemical thrust to get to orbital altitudes. But where would we put it, if it's even possible to build one? (Maybe on Mars first....)
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