I'm so pleased that space stuff is getting a lot of media attention at the moment - it'll be unbelievable if a manned mission to Mars comes off in our lifetimes!
If and when man settles on Mars and generations pass,what of the people who grow up on Mars.Will they evolve into a hybrid humans,with weak muscles? Would they ever be able to visit Earth,or would it`s gravity,not quite crush them,make it very uncomfortable for them to visit?
Just a thought.
historian