the best place for humans to live is the planet earth
Yes, it is the best place because our bodies after millions of years are perfectly adapted to this environment. But perhaps in the future, if we manage to find a way to change our biological bodies to synthetic bodies, living in space would be much easier. Of course, this is all a futuristic subject, but possible nonetheless.
When reading that the twin from space was taller I immediately thought about gravity.
You mean like upload our brains in a robot or something? Well, anything is possible. Thanks for your comment.