The trouble with the word "nanotechnology" is that it refers mostly to an idea from science fiction and futurism: nanoscopic, self-replicating machines that can turn any piece of matter into another piece of matter in seconds. These do not exist. In the real world, materials scientists, physicists, and biology researchers are working at the nanoscale to build everything from stretchy circuit boards and self-healing plastic to super condoms and cancer medicines. Here are eight innovations that actually exist at nanoscale, and could be about to change your life.
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