Readers marvel over moon mementos and more
Your comments and questions on the July 6, 2019 & July 20, 2019 issue of Science News
Bygone boot print?
No nation governs the moon’s surface, but NASA has issued guidelines for protecting artifacts still there from the Apollo missions, Maria Temming reported in “Apollo astronauts left trash, mementos and experiments on the moon” (SN: 7/6/19 & 7/20/19, p.