In 1206, who formally took the title Great Khan of the Mongols?

A.S. Neill shook the educational establishment with his 1960 book on a radical approach to child rearing, named for whi… As reporter Hildy Johnson, Rosalind Russell plays the title role in which fast-talking 1940 film? As NFL commissioner from 1960 to 1989, who helped create the Super Bowl and Monday Night Football? Which actor won an Oscar for playing Norman Thayer in "On Golden Pond" (1981)? By 1825, Spain had lost all its possessions in the Americas except which two islands? Under a 1960 declaration, some descendants of which monarch bear the surname Mountbatten-Windsor? Which Pulitzer Prize-winning novelist published no other novel for 55 years until "Go Set a Watchman" appeared in 2015? In 1996, five of the 15 best-selling children's books of all time were by which author?