Like a grain of sand: they build the smallest flying microchip in the world | Science

A microchip with wings, the size of a grain of sand, has become the smallest human-made device with the ability to fly. The new microflier, as its inventors call it University Northwestern, it has no motor. Instead, it is capable of moving with the wind, much like the propeller seed of a tree maple, and spins like a helicopter through the air to the ground.

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