When the disembodied cockroach leg twitched, Yeongin Kim knew he had finally made it.
A graduate student at Stanford, Kim had been working with an international team of neuroengineers on a crazy project: an artificial nerve that acts like the real thing. Like sensory neurons embedded in our skin, the device—which kind of looks like a bendy Band-Aid—detects touch, processes the information, and sends it off to other nerves.
Yup, even if that downstream nerve is inside a cockroach leg.
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