PEACE Polymers (IMAGE) NASA/Johnson Space Center Caption This image shows the MISSE 2 PEACE Polymers experiment: a.) before flight, and b.) after four years of space exposure on the exterior of the International Space Station. Credit NASA Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.