月の石
In 2010, Richard Kevin Griffis, a graduate student at the University of Phoenix was assigned the task of tracking down the Apollo 17 Goodwill Moon Rock by his Professor Joseph Gutheinz. He discovered that the Colorado Apollo 17 Goodwill Moon Rock was missing, which led to the admission by Vanderhoof that he had possession of one of two Colorado Moon rock displays that was presented to the state of Colorado by President Richard Nixon in the 1970s. Vanderhoof voluntarily surrendered the rock, which at the time was estimated to be worth $5 million. The rock was subsequently put on display at the Colorado School of Mines Geology Museum.