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One way the exercise issue can be helped is by putting the astronauts into a sort of cocktail shaker cage that forces exercise to keep from getting tossed around. Involuntary exercise of that sort or another might be the answer.
Interesting study, but odd that Obama is listed a proposing anything space related. He kills all domestic development, tells NASA to spend time telling other countries how important their contributions to science have been.. and then has the gall to propose a trip 20 years after he's out of office..
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