What would really happen if you were exposed to vacuum?Geoffrey A. Landis12/08/10 5:02pm177EditPromoteDismissUndismissHideGo to permalinkPeople often ask: how realistic is the scene in 2001: A Space Odyssey where Bowman makes a space-walk without a helmet? How long could you survive in vacuum? Would you explode? Would you survive? How long would you remain conscious?