Scientists build army of 1 million microrobots that can fit inside a hypodermic needle


A four-inch wafer of silicon has been turned into an army of one million microscopic, walking robots, thanks to some clever engineering employed by researchers at Cornell University in New York.

In a paper, published Wednesday in the journal Nature, a team of roboticists detail the creation of their invisible army of robots, which are less than 0.1mm in size (about the width of a human hair) and cannot be seen with the naked eye. The robots are rudimentary and are reminiscent of Frogger, the famous 1980s arcade game. But they take advantage of an innovative, new class of actuators, which are the legs of the microrobots, designed by the team.


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