A U.S. dollar dated 1804, made of which metal, is now worth over a million dollars?

A documentary film crew in the Amazon encounters a giant snake in which 1997 film? Which Louisville-born boxer's rhyming boasts have led many to call him a forerunner of rap? The documentary "From Mao to Mozart" was made about which violinist's 1979 tour of China? According to superstition, a dog doing what means someone's death is near? Which Virginia estate was home to James and Dolley Madison? A doomed boy in which 1954 novel declares "I got the conch... You let me speak"? What is a dot on a die called? A men's dressing table created in the late 1700s was named for which British dandy?