Nanorobotics involves the design and construction of robots on the nanoscale level using components that are between 1 to 100 nanometers. It includes programming swarms of nanorobots to perform tasks like breaking up kidney stones or repairing spacesuits. While nanorobots show promise for medical applications and space technology, challenges remain around their power supply, control, and potential health and environmental risks if replication gets out of control. A pioneer in medical nanorobotics developed prototypes for applications like monitoring brain aneurysms and treating diabetes.