Lying in Bed for Science (IMAGE) NASA/Johnson Space Center Caption Participants may keep their cell phones or use computers during the bedrest study, but they must maintain a six-degree head-down tilt at all times. Credit German Space Agency (DLR) 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.