At the start of "Close Encounters of the Third Kind," what missing since 1945 is found in the Sonoran Desert?

At the Battle of Lewes in 1264, which English king and his son Edward were defeated and captured by Simon de Montfort? At the start of 2000, Rickey Henderson had 1,334 career stolen bases, 396 more than which former St. Louis Cardinal? At the start of a 1999 sequel, which title hero discovers that his new wife, Vanessa, is actually a fembot? At the start of an 1893 opera, which children are sent into the woods to pick strawberries? At the start of the 1986 season of "Dallas," which character was seen taking a shower, revealing that his death had bee… At the start of which 1900 novel has Caroline Meeber left home for Chicago? At the 1876 Centennial Exposition, who was on hand to introduce his new telephone? At the 1998 Oscars, which Best Director winner declared himself "king of the world"?