Film critics pick the 50 best movies of all time

From film critics Gail Kinn and Jim Piazza's new book 'The Greatest Movies Ever,' their picks for the 50 greatest films

49. '2001: A Space Odyssey'

"Kubrick's aim was always high," Kinn and Piazza write of the 1968 film by the director. "But this time he shot his arrow past the stars and into the heavens to explore his ideas about man's place in the universe, extraterrestrial life, and the lives and deaths of intelligence and the imagination." Actor Nigel Davenport was considered as the voice of the robotic computer HAL 9000. Many audience members thought the apes in the beginning of the film were real -- but they're just actors wearing suits.