Prosthetic limbs have come a long way since someone first strapped on a wooden peg in about 300 B.C. Inspired by the animal world, a group of scientists at Northern Arizona University is now working on a way to make a computerized bionic ankle act like a real leg by getting muscles to behave like springs. From member station KNAU, Melissa Sevigny reports.
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This segment aired on May 13, 2016.