Although humans have been exposed to airborne nanosized particles (NSPs;< 100 nm)
throughout their evolutionary stages, such exposure has increased dramatically over the last
century due to anthropogenic sources. The rapidly developing field of nanotechnology is
likely to become yet another source through inhalation, ingestion, skin uptake, and injection
of engineered nanomaterials. Information about safety and potential hazards is urgently
needed. Results of older bio-kinetic studies with NSPs and newer epidemiologic and�…