Tokyo-born American citizen Yoichiro Nambu of the University of Chicago gives a phone interview in his Chicago home October 7, 2008. Two Japanese scientists and Nambu shared the 2008 Nobel Prize for physics for discoveries in sub-atomic particles, the prize committee said on Tuesday. The Nobel committee lauded Nambu, and Makoto Kobayashi and Toshihide Maskawa of Japan for separate work that helped explain why the universe is made up mostly of matter and not anti-matter via processes known as broken symmetries.REUTERS/John Gress (UNITED STATES)