We once thought that if Mel Brooks ever made a parody of "Fantastic Voyage" in the 1970s, the team of doctors and scientists (and rarow, Raquel) would have traveled through that guy's blood stream in a Renault LeCar. (There would, of course, have been the obvious "actual size" joke to go with it.) Now, scientists at Rice University have constructed a molecular-level "vehicle," only 3-4 nanometers across (slightly smaller than a stock LeCar), using organic material. The car has a defined chassis, freely rotating axles, pivoting suspension wheels made of buckyballs, consisting of 60 atoms of carbon. What to use it for? Cramming nano-sized college students into, of course.