Published December 6, 2013 at 220 × 300 in No peak in sight for evolving bacteria There’s no peak in sight – fitness peak, that is – for the bacteria in Richard Lenski’s Michigan State University lab. Image courtesy of MSU Richard Lenski pulls frozen bacteria cultures out of a freezer in the lab on Thursday October 15, 2009. poses in the lab on Thursday October 15, 2009. (Visited 8 times, 1 visits today)