A plaque left on the Moon in July 1969 has the signatures of Neil Armstrong, Buzz Aldrin and which two other men?

Which plant of the parsley family is known as Apium graveolens? What is a scientist who studies plants called? A plaque in Yankee Stadium's Monument Park honors which former cardinal for a 1979 event held at the stadium? A plaque in the Louisiana State Capitol marks the site of which violent event of September 8, 1935? What is a plaster cast made of a living person's face called? A platypus was one of the mascots of the 2000 Summer Olympics in which city? What is a play area for very young children, and also a franchised children's TV show begun in 1953? What is a playing card with two spots called?