Tim Peake, ESA (IMAGE) NASA/Johnson Space Center Caption ESA astronaut Tim Peake tweeted picture of his first blood draw completed in space. The sample was taken as part of the MARROW investigation. 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.