SpaceX Dragon cargo ship brings Robonaut and mice back to Earth from space station

News Brief: After a month of unloading and reloading, SpaceX’s Dragon cargo capsule was set loose from the International Space Station today and made a splashdown in the Pacific Ocean. The two tons of cargo that were returned to Earth include mice that were part of a study focusing on zero-G’s effects on bones and muscles — and Robonaut 2, a space robot that’s being sent down for repairs. The Dragon splashed down around noon PT and will be delivered by a recovery ship to California for processing. Orbital ATK’s Cygnus cargo freighter is due to take on the next space station delivery on May 20.