Robot: Mobile untethered robots (microbots)

Created by: Bruce Donald at Duke University
Size: 200 microns long (smaller than the width of a human hair)
Purpose: Studying possibilities for manipulating cells

Researchers at Duke University have created dozens of microbots, robots small enough to line up 200 on a single M&M. "They are programmable to do simple tasks," says Duke scientist Bruce Donald. "It's the same as a car. We spent many years building something that could drive around at that scale." The future is now open for the tiny mobile devices, with possible medical collaborations or jobs repairing computer chips.

See the microbots in action
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