Beginnings of Bionic

Michael McAlpine’s shiny circuit doesn’t look like something you would stick in your mouth. It’s dashed with gold, has a coiled antenna and is glued to a stiff rectangle. But the antenna flexes, and the rectangle is actually silk, its stiffness melting away under water. And if you paste the device on your tooth, it could keep you healthy. The electronic gizmo is designed to detect dangerous bacteria...

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