University of Illinois Urbana-Champaign Physics Professor Nigel Goldenfeld talks about his memories of Dr. Carl R. Woese during the memorial for the University of Illinois microbiology and Institute for Genomic Biology professor held at the Levis Faculty Center in Urbana, Ill. on Saturday, January 26, 2013. The world-renowned microbiologist died December 30, 2012, at age 84 in Urbana. (AP Photo/The News-Gazette, Robin Scholz) MANDATORY CREDIT