But nanomachines do already exist inside you. They are large molecules like the enzymes that help power your body, and the ribosomes that make the proteins to form your hair and nails. They are present inside the cells of your body. They just don't look like our idea of machines.
But they are designed to work at the nano-scale. If we could learn to copy their designs we might be able to build nano-sized robots to help heal our bodies.
|A ribosome is a natural nanomachine that makes proteins inside your body.|
Image: DESY, Hamburg