@ApolloPlus40 - Lunar composition
Anthony Turkevich was a University of Chicago chemist who studied the composition of the lunar soil during the 1960s. Using measurements made on the robotic Surveyor lunar missions, he found oxygen trapped in some of the soil.
Turkevich told UPI that extracting the oxygen to use by astronauts on the Moon, which would have been useful if NASA had established a long-term manned presence. For the Apollo missions, oxygen came from fuel cells aboard the spacecraft.
