40-year mystery about rising temps on moon solved — and it was probably the Apollo astronauts' fault

An explorer's adage says to "take only photos, leave only footprints." But it seems the footprints of NASA's Apollo astronauts had unintended consequences for the surface of the moon after they landed there nearly 50 years ago. Newly discovered temperature data from the 1970s moon landings, released in the Journal of Geophysical Research in April, reveals that NASA astronauts probably warmed up the moon's surface temperature by as much as 6 degrees Fahrenheit by walking around and poking into the lunar surface. The data comes from so-called heat-flow experiments that were installed on the moon in 1971 and 1972 during...