In addition to his concept sketches for Star Trek: The Motion Picture and Disney’s The Black Hole, and iconic poster art for Stanley Kubrick’s masterpiece 2001: A Space Odyssey, McCall’s visions of the final frontier were used by NASA and the U.S. Postal Service, which commissioned him to commemorate many of the greatest moments in space travel history in the form of postage stamps (some of which have been carried to the moon and back).