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Jay520 said:
I think if a species was intelligent enough to travel between planets, then i m sure they would put forth measures to prevent such changes. Things like muscular training could keep your body from shrinking. As for the gray color, I'd say they could also replicate sunlight if they could do space travel.


Spin a part of the the spacecraft and the major thing which is lack of gravity is resolved. Remain a space dweller however and you might reach the conclusion that gravity is not needed? maybe.