Stuart Roosa had once been a U.S. Forest Service smokejumper. In 1971 Roosa was the command module pilot on NASA’s Apollo 14 mission, responsible for circling the moon alone while Alan Shepard and Edgar Mitchell cavorted on the lunar surface below. Roosa had brought a canister packed with hundreds of tree seeds: loblolly pine, Douglas fir, redwood, sweetgum and sycamore. Dave Williams is the unofficial archivist of the so-called “Moon Trees,” roughly 120 of which were planted around the world. It isn’t really Williams’s job — he’s a planetary scientist who works on preserving data collected on the Apollo missions and making it available to researchers. …Trees were planted across the country and in at least two foreign countries. …Roosa died in 1994, before Williams had a chance to speak with him. But Williams connected with the late astronaut’s children. Daughter Rosemary Roosa runs the Moon Tree Foundation, which makes second generation saplings available.