Researchers at the university of Pennsylvania have developed micro robots so small that they can be injected through a hypodermic needle, opening up a range of medical applications.
They developed these cell-sized robots using a nanofabrication technique. The technique allowed researchers to turn a 4-inch specialised silicon wafer into a million microscopic robots in just weeks and at a low cost.
Each bug-shaped robot is the width of a human hair, is wirelessly powered, and is able to walk and survive harsh environments. These properties mean that the nanorobot can be injected into the human body and perform tasks such as drug delivery, mapping the brain or monitoring vital signs.