Passersby could be forgiven for overlooking the tall loblolly pine a few hundred feet south of Grosvenor Lane in Bethesda, Maryland. After all, the sole indication that it’s anything more than a stately conifer is a worn wooden plaque at the base marked only with the number 12. As a matter of fact, this specimen is one of the “moon trees” grown from seeds carried on Apollo 14, deposited here among care homes and condominiums by the unexpected history of the location where it stands. Long before this area was…