Kate Rubins (IMAGE) NASA/Johnson Space Center Caption NASA astronaut Kate Rubins removes samples from the Minus Eighty-Degree Laboratory Freezer for ISS (MELFI). Blood, saliva and urine samples will be stored in MELFI until they can be transported back 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.