Researchers Target Tumors With Tiny 'Nanoworms'

ScienceDaily (2008-05-07) Scientists have development nanometer-sized "nanoworms" that can cruise through the bloodstream without significant interference from the body's immune defense system and--like tiny anti cancer
missiles - home in on tumors.

http://www.sciencedaily.com/releases/2008/05/080506200531.htm#

Video Link:

http://cosmos.bcst.yahoo.com/up/player/popup/index.php?cl=7814807