Canadarm 2 is a larger and more sophisticated version of the robotic arm built for the space shuttle.
The new arm also has a hand on either end so one can latch onto the space station while the other end reaches out and picks up things that it needs. Then it can let go and grab on somewhere else.
The real talent in the new design is in its ability to move around where the astronauts most need the robot arm. The Canadarm 2 can crawl along the body of the space station on its two hands, end over end like an inchworm. CBC
