Stock Photo - PRODUCTION - 05 November 2021, North Rhine-Westphalia, Cologne: Stefan Möstl, (front) deputy project manager of the NASA bed rest study, sits on a bed in ""Envihab"", the medical research facility of the DLR Institute of Aerospace Medicine (German Aerospace Center). Behind him are Alexandra Noppe (l-r), responsible for looking after the test subjects, Edwin Mulder, project manager, and Andrea Nitsche, responsible for recruiting the test subjects. Humans aspire to space - but their bodies are only conditionally suited for this. In order to find out what can be done about the pitfalls of weightlessness, a new study is currently underway in Cologne. The task: Lie in bed for a long time and eat everything. (to dpa ""Lie down and let lie - study simulates space with bed rest"") Photo: Oliver Berg/dpa. - Cologne/North Rhine-Westphalia/Germany