For other people named Bob Powell, see Robert Powell (disambiguation).Bob Powell (né Stanley Robert Pawlowski; October 2, 1916 – December 1967) was an American comic book artist known for his work during the 1930-40s Golden Age of comic books, including on the features "Sheena, Queen of the Jungle" and "Mr. Mystic". He received a belated credit in 1999 for co-writing the debut of the popular feature "Blackhawk". Powell also did the pencil art for the famous bubble gum trading card series Mars Attacks. He officially changed his name to S. Robert Powell in 1943.