Nano robotics

In a recent study published in the scientific journal ACS Nano, researchers described how they used a tiny robot to clean the entire oral cavity. The researchers created a swarm of "iron oxide nanoparticles", which they controlled using a magnetic field

Nanotechnology engineers at the University of California San Diego have developed tiny robots - micro-robots, in their full name - that are able to swim inside the lungs, reach the bacteria that cause pneumonia, kill them and reverse the damage they do to the body