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A symmetrical droplet (top) forms on a surface with straight nano-pillars, while on a surface with bent pillars (bottom) the droplet is asymmetrical, extending out only to the right. Inset images are micrographs of the surface structure.

Pushing droplets around

MIT researchers find a way to make drops on a surface move in just one direction, with possible applications ranging from biology to electronics

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Feeling the way

Robotic device developed in MIT’s Touch Lab can help visually impaired people navigate around a virtual model of a real building.

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