April 18, 2007 6:39pm CST
Researchers at IBM were astounded to discover in the late 1980's that a type of electronic microscope invented to study the properties of atoms could literally pick up the microscopic block of matter one at a time and move them. To prove the point, the scientist took 35 xenon atoms, shuffled them around and spelled out IBM at infinitesimal scale. The implication here is that it is possible to built cell-sized robots that can be injected into a bloodstream. Once inside, these robots will scrape off fat off the walls of blood vessels.