Nanotechnology involves manipulating matter at the atomic and molecular scale, between 1-100 nanometers. It allows the creation of smaller, cheaper, lighter devices that can do more with less resources. Examples include carbon nanotubes that are 100 times stronger than steel yet lighter than a feather. Nanotechnology is being applied in products like sunscreen, self-cleaning glass, scratch-resistant coatings, and antimicrobial bandages. In the future, scientists believe nanotechnology could enable molecular manufacturing and nanobots for applications in medicine, space, and more.