Lack of gravity also means there will never be a permanent presence in space. Making a big station and spinning it is the only way anyone is going to survive in

Lack of gravity also means there will never be a permanent presence in space. Making a big station and spinning it is the only way anyone is going to survive in space for more than a few years. I guess if the costs of sending something into space comes down this will become an option, then they just have to solve radiation shielding and everyone will be happy. Of course no tests have been actually done so both are assumptions..