There was a proposal in the 90s to dismantle the Space Shuttle Columbia and turn it into a mini-International Space Station.
Thank goodness we ended up with the ISS that we did!
@Zuph Should have done it anyway! More space stations!
@anarchiv True! And Columbia would have been the ideal conversion, since it was barely able to make it to the ISS anyway (and never actually visited).
@Zuph was there a difference in construction compared to the other shuttles?
@anarchiv All of the shuttles were slightly different! And diverged more as time went on.
Columbia was 8,000 lbs heavier than the others, owing to a slightly different wing spar design. It also retained the internal airlock that was scrapped on other orbiters. It also had an experiment pod on the vertical stabilizer, and for a while had ejector seats and slightly different displays.