
Head of the Gravitational Biology Section Ruth Hemmersbach (L-R), DLR-CEO Pascale Ehrenfreundhe, ESA-president Johann-Dietrich Woerner, German Chancellor Angela Merkel and the German astronaut Alexander Gerst view a moving centrifuge in the DLR-Laboratory for Life Science Experiments during visits the European Astronaut Centre (EAC) in Cologne, western Germnay on May 18, 2016. / AFP PHOTO / POOL / SASCHA SCHUERMANNSASCHA SCHUERMANN/AFP/Getty Images


