Researchers have developed a micromachine that can perform different actions. First nanomagnets in the components of the microrobots are magnetically programmed and then the various movements are controlled by magnetic fields. Such machines, which are only a few tens of micrometers across, could be used, for example, in the human body to perform small operations.

Original source: https://www.sciencedaily.com/releases/2019/11/191106130339.htm