Miniscule motor swims through the bloodstream

Researchers from Monash University in Australia are working on microbot motors designed to swim through the human bloodstream. Dubbed the "Proteus" after the miniature submarine that traveled through the body in the 1966 sci-fi flick, Fantastic Voyage, the tiny piezoelectric motor is just 250 micrometers or a quarter of a millimetre wide - that's around 2.5 times the width of a human hair.

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