Clearly, vaccinations are so three years ago. As the race continues to find the best, most mobile internal transportation device for delivering drugs to remote places within the body, Peer Fischer of The Rowland Institute at Harvard University has teamed with colleague Ambarish Ghosh to concoct the wild creation you see to the right. The glass-derived nanopropeller was designed to move in a corkscrew motion in order to plow through syrupy, viscous liquids within the human frame. The device itself is fantastically small, measuring just 200 to 300 nanometers across at the head and 1 to 2 micrometers long. Fischer points out that each of these can be controlled with a striking amount of precision via an external magnetic field, though we don't get the impression that they'll be on to FDA testing in the near future. Ah well, at least our gra, er, great-grandchildren will be all taken care of.