Prof. Emeritus Dietrich Müller, a renowned experimental physicist at the University of Chicago who spent half a century building instruments to study energetic particles from space called cosmic rays, died Dec. 22 at the age of 85.
Prof. Emeritus Allan Rechtschaffen, a pioneer of modern sleep research and director of the University of Chicago Sleep Laboratory for more than 40 years, died Nov. 29. He was 93 years old.
