Scientists at Julius-Maximilians-Universität Würzburg in Germany have created very small robots, called nanorobots. These robots are less than one micrometre across, meaning dozens could fit across one human hair. The robots can move through liquid and collect bacteria, carrying them to places chosen by the researchers.

The main reason for this invention is that it is difficult for scientists to control or move things that are as small as bacteria. The robots work by using special antennas to catch light, which pushes them forward. By changing the direction of the light, scientists can also steer the robots where they want.

The most important result is that these light-powered nanorobots could help scientists study cells and bacteria more easily. This technology is still being tested, but it may offer new ways to organise and move tiny things in laboratories.