South Korean scientists have developed a new kind of cancer treatment method that has nanorobots target and take down tumors. Since it's happening at the cellular level, it's hardly invasive and you might not even be aware that there are drug-carrying nanorobots in your body, fighting off cancer for you. The nanorobots only release the drugs they are carrying in the presence of a cancerous cell, and do not cause any harm to healthy cells.
As of now, the nanobots are only equipped to detect cancers like breast or colorectal cancer, since these have solid tumors that form and are easily picked up by the robots. In the future, scientists expect that the nanobots will be able to detect more types of cancer and eliminate some of the negative side effects that come with chemotherapy.