William Rudolf "Bill" Muehlberger (born September 26, 1923), Professor of Geology at University of Texas at Austin, was the geology Principal investigator of both the Apollo 16 and 17 missions to the moon, for National Aeronautics and Space Administration (NASA).
Transferred from en.wikipedia to Commons.
(Original text: This is an edited screen capture from "Nothing So Hidden," a documentary on Apollo 16 produced by NASA and available on Youtube. The original image is in the public domain because it is a work of the U.S. Government (NASA).