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The "Mission: Impossible" music might be a bit much here, but the mechanical design is pretty clever: moving segments equipped with clamps alternately retract and extend, propelling the inchworm robot forward. All it takes a single motor to spin the thing, and since it's so simple, you can crank it up to 5 cm/s, which is seriously quick for a robot like this. But perhaps the biggest advantage is efficiency: with a small on-board battery, these kinds of robots can climb vertically for hundreds of meters.
