Nanotechnology

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Nanotechnology is the catch-all term given to the study and manipulation of things smaller than 100 nanometres, especially the manipulation of individual molecules. Nanotechnology covers biomedical applications such as gene therapy, drug delivery systems as well as electronics and precision engineering. Nanotechnology is exciting, fascinating and life threatening. Substances at the nano-scale are of similiar dimensions and behaviour to the molecules and cellular structures that underlie the physiology of life on earth. Nano-particles have the potential to interfere and disrupt the very processes that are responsible for our existance. There is currently no way of predicting the effect of nanotechnology on life at large because substances that are innocuous at the metre-scale behave very differntly at the nano-scale.

Wikipedia has an article about Nanotechnology