Five women and three men from seven European countries are part of the European Space Agency's astronaut reserve pool. Here they practice a water rescue off Germany's Baltic coast. Jens Büttner/dpa ...

NASA is preparing astronauts for a return to the Moon by training them underwater in a massive swimming pool at the Johnson Space Center. Known as the Neutral Buoyancy Laboratory, the facility uses ...

"One, two, three," counts Sara García Alonso, looking at her fellow astronaut Amelie Schönenwald before both fall backwards from the life raft into the water. With a hiss their life jackets inflate, ...