Something strange happened on the moon during the Apollo missions of the early 1970s.
Probes deployed by the Apollo astronauts revealed that temperatures on the moon’s surface and subsurface were inexplicably rising. Temps kept rising slightly during the six years that the probes were functional. For decades, scientists puzzled over what might have caused this increase in temperature. Could the phenomenon be ascribed to changes in the moon’s orbit? Was the moon being affected by excess radiation coming from Earth?