Rice University scientists have constructed the world's smallest car -- a single molecule "nanocar" that contains a chassis, axles and four buckyball wheels.
The nanocar consists of a chassis and axles made of well-defined organic groups with pivoting suspension and freely rotating axles. The wheels are buckyballs, spheres of pure carbon containing 60 atoms apiece. The entire car measures just 3-4 nanometers across, making it slightly wider than a strand of DNA.
Go read the entire press release issued by Rice University. It even shows what the car looks like! Bethany Halford has a write-up about the nanocar. The website of the researcher driving the nanocar, Prof. James Tour is here.