0Science Breakthroughs in 2011: Cancer Vaccines, 3-D Printing, and MoreThe year 2011 saw smaller batteries for electric cars, cancer vaccines, and neutrinos faster than the speed of light. Alison SnyderUpdated Apr. 24, 2017 12:40PM ET / Published Dec. 20, 2011 4:45AM ET (clockwise) Corbis ; CERN ; ABC