The Robonaut R2 was the seventh crew member aboard the space shuttle Discovery, which set off to the International Space Station on 24 February 2011. R2 had waited patiently for more than four months in the payload bay of Discovery for its launch to the ISS. This robonaut, built by NASA and the U.S. auto giant General Motors will support the work of the astronauts and prove its usefulness on board the ISS. In the meantime, his twin brother (photo) demonstrates his skills in the fesh air. All the same, a decline of R2's "muscle power" under microgravity is not expected.