Paolo Nespoli, European Space Agency (IMAGE) NASA/Johnson Space Center Caption European Space Agency astronaut Paolo Nespoli operating the Light Microscopy Module microscope aboard the International Space Station on a previous mission. 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.