Propelling robots in manned cosmonautics is one of the visions, which the scientists are working upon. After NASA’s R2, Russia is busy designing their Robonaut, the SAR-400. Within the next few years, we would be witnessing SAR-400 stepping into the ISS. Like R2, aim of SAR-400 too would be to solve repair and maintenance issues on the ISS. Talking about the physical structures, both the bots are in form of a robotic torso with no legs of course making it easier to fix to a crane on the ISS.
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