NASA plans on solving the aging-astronaut problem by partnering with GM to create the Robonaut 2 (or R2), a new "permanent resident of the International Space Station".
R2 is the result of a co-op between NASA and GM to create a robotic assistant for human workers (that looks like Cobra Commander). Weighing in at 300 pounds, R2 is going into space for some zero-gravity operation and electromagnetic/radioactive interference testing within the station...BUT HE WON'T BE ALONE.