Randy Bresnik, NASA (IMAGE) NASA/Johnson Space Center Caption NASA astronaut Randy Bresnik works with the bioreactor bags containing lung tissue samples within the Microgravity Science Glovebox aboard the space station. The culture fluid will need to be frozen and returned to Earth for analysis. 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.