How time spent in space creates unusual immune-system impact New Zealand HeraldMark Kelly could join a small club of congressmen who have traveled in space CBS News'Every Day Is A Good Day When You're Floating': Anne McClain Talks Life In Space NPRTwins in NASA research offer clues to rigors of space SFGateNASA Reveals How Space Affected Astronaut’s Body Compared To His Twin LADbibleView full coverage on Google News