
By Thom Patterson, CNN
Not long ago, a pair of Harvard scientists hit on an "aha" moment in the most unexpected place: while waiting in line at a post office.
Robert Shepherd and Filip Ilievski were trying to help the rest of their research team create a new generation of bendable rubbery robots called soft robots.
They already had a design that allowed their bendy robot to undulate, or move in a wavy motion. But they were looking for a design that offered more movement.


Twistable chains reproduce the motions of human muscles in ways like no other device.
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