Charles Raymond Bentley (December 23, 1929 - August 19, 2017) was an American glaciologist and geophysicist. Bentley was born in Rochester, New York, into a family of lawyers. He attended Phillips Academy in Andover, Massachusetts, before enrolling at Yale, where he earned a degree in physics. His original idea was to study law, but his plans changed after he spent a summer working aboard a research ship in the Atlantic under the leadership of Maurice Ewing, an oceanographer from Columbia University. This revelation led Bentley to enroll at Columbia and study geophysics. During his time at Columbia, Bentley spent two summers working on the ice in Greenland, where he developed a seismic method for measuring ice depth. He successfully defended his dissertation in 1956. However, Bentley was awarded a spot on the United States Antarctic Expedition team, and left for Antarctica in 1957. He spent 25 months on the Antarctic ice, during which time he and the other members of the five-person team explored unknown parts of the Antarctic continent. They discovered a trench the size of Mexico and became the first team to successfully measure the ice sheet, which they discovered was as much 3,000 meters thick in places. It was only after returning from Antarctica that Bentley was notified that he had neglected to pay a $50 'disstertation fee'. Bentley joined the faculty at the University of Wisconsin-Madison in 1961 and became a giant in the field of glaciology. It is said that Bentley's 'first and foremost' concern after reaching the University of Wisconsin was 'training generations of glaciologists and geophysicists'. He made at least 15 trips to Antarctica during his seven decade career, including celebrating his 80th birthday on the ice during his last trip to Antarctica in 2009.