Nanotechnology has been compared to the great events of human history like the industrial revolution or the discovery of antibiotics.  Nanotechnology is the application of science to utilize nano size tools and matter for applications not possible at larger sizes. A nanometer is one-billionth of a meter and nanomaterials are typically one to 100 nanometers in diameter. But because of this nano-size, the characteristics and properties change so dramatically, that in addition to the new applications, they pose new risks as well as opportunities for society.