Not all robots are visible to the naked eye.

Nanobots have long been the most fantastical of the various subfields of robotics, often used as a way to explain various powers and abilities of characters in science fiction and even featuring in superhero narratives as the basis for some pretty outlandish powers.

In reality, nanobots are essentially molecular level robots, usually about the width of a strand of human hair, that can be programmed to carry out a variety of tasks. It remains one of the newest emerging fields, due to the technological difficulties of building on such a small scale, yet the incredible potential of this technology has attracted substantial investment and research in recent years. Let's dive in and take a look at how nanorobots are being used today.