Even basic sensory maps in the brain can be remapped in a matter of months, says neurologist V.S. Ramachandran. Mads Abildgaard/iStockphoto.com hide caption

itoggle caption Mads Abildgaard/iStockphoto.com

IBM's Watson computer system competes in a Jeopardy! practice round on Jan. 13 against two of the show's most celebrated contestants: Ken Jennings and Brad Rutter. IBM hide caption

itoggle caption IBM