Comic books galore, sold on the streets of New York City. Photo by Christina Bellantoni/PBS NewsHour. It's not just great CGI animation and big-name actors that make Spiderman and Iron Man such big hits at the box office. The resurgence…

In 2013 Superman marks his 75th anniversary. Over the decades the hero has leaped from comic books to movies, TV shows, radio, video games and merchandise. But Superman's main goal of protecting truth, justice and the American way remains the…