Scientists just built a robot smaller than the width of a human hair (!)

It has no motor, no computer and no battery

It's a 3D-printed, flexible chain of microscopic segments that, after being hit with an electric field, started swimming through liquid like a snake.

Try to… pic.twitter.com/OfDpkqJ8rO

— Rowan Cheung (@rowancheung) 29 avril 2026

Scientists just built a robot smaller than the width of a human hair (!) It has no motor, no computer and no battery It's a 3D-printed, flexible chain of microscopic segments that, after being hit with an electric field, started swimming through liquid like a snake. Try to

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