Researcher Peter Grunberg, pictured in a handout photo, shares this year's Nobel Prize in physics with his colleague Albert Fert, announce on October 9, 2007. Grunberg and Fert are being honored for their discovery of giant magnetoresistance (GMR) in the 1980s that led to the breakthrough of gigabyte hard disk used in all modern computers. (UPI Photo/Research Centre JŸlich).