A nanorobotics is a machine that can build and manipulate things precisely at an atomic level. Imaging a robot that can pluck, pick and place atoms like a kid plays with LEGO bricks, able to build anything from basic atomic building blocks. While some people dismiss the future of nanorobots as science fiction, you should realize that each of us is alive today because of countless nanobots operating within each of our trillions of cells. We give them biological names like a “ribosome,” but they are essentially machines programmed with a function like “read messenger RNA to create a specific protein.”