Chances are you’ve seen a Robert McCall piece at some point in your life. His epic visions of the past, present and future of space exploration are in the National Air & Space Museum, on postage stamps, and the poster for 2001: A Space Odyssey, to name a few. He is absolutely the master of his niche. If you’re into this kind of thing, check out his website. It has an amazingly comprehensive gallery of Robert’s paintings from his extensive career.