Apollo 17 left the Moon 45 years ago. That dirty space gear has a story to tell.
December 13, 2017 | 11:33 PM EDT
45 years after NASA astronauts Eugene Cernan and Harrison Schmitt left humanity's final footprints on the Moon, their spacesuits remain visibly grimed with Moon dirt. The folks talking about returning to the Moon would do well to listen to the story these suits have to tell: That dirt proved to be an unexpected challenge in lunar exploration.