I have just recently been looking into cancer and only know very little about it except the basics: cancer cells are cells that are continuing to grow and divided while other cells stay normal. At least that is my understanding of it. If this is true, is it possible to create a technology, lets say for example, a small robot that you can inject into your blood stream which is programmed to scan cells and then destroy cancer cells or potential cancer cells? Then lets say you mass produced these very tiny robots so that there would be more scanning and quicker destroying? Its just a thought.