Test Tubes for Flatworm Study (IMAGE) NASA/Johnson Space Center Caption These are sample test tubes used to contain flatworms during the Flatworm Regeneration investigation aboard the International Space Station. Credit Kentucky Space Usage Restrictions For news coverage in connection with this news story. 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.