A recent study has developed medical robots that have the potential to navigate through the human body. These robots, created by researchers at the University of Colorado Boulder, are about the size of a grain of sand. The robots are equipped with magnetic properties that enable them to be controlled and guided using external magnetic fields. The team has successfully demonstrated the ability of these robots to move through simulated blood vessels in a lab setting. The long-term goal is to utilize these robots for targeted drug delivery, minimally invasive surgeries, and other medical applications within the human body.