Two-legged robots can walk well enough but still can't come close to matching the human gait that, due to its unmatched efficiency, is the subject of study by Joo Kim, professor in the department of mechanical and aerospace engineering at the Polytechnic Institute of New York University. The hope is to evaluate the multitude of factors that figure into the human stride to advance robots from their current mincing steps as well as help people who have difficulty walking. "My approach is to look at the intersection of robots and humans. I sometimes go back and forth and look at what is the common approach between the two," Kim says.

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