Words: Endeavour, orbiter, corridor, NASA, placard, hatch, tragic, taunting, veteran, microgravity, astronauts, mineral density, rehabilitation, muscle mass, jugular vein, Venous Thrombosis, implications, SpaceX, sole, low-earth orbit, transportation infrastructure, leverage, intrigues, sustain, credible, linear, exponential, ameliorate ☞ freetime.education/rewind