Superman (1939). Certain materials such as lead can block his X-ray vision. Superman can project beams of heat from his eyes which are hot enough to melt steel. He first used this power in "Superman" #59 (1949) by applying his X-ray vision at its highest intensity. In later stories, this ability is simply called "heat vision". Superman can hear sounds that are too faint for a human to hear, and at frequencies outside the human hearing range. This ability is introduced in "Action Comics" #11 (1939). "Action Comics" #1 (1938) explained that Superman's strength was common to all Kryptonians because they
Superman character and cast as well as the Justice League of America and the Super Friends (of which Superman is usually a member and most of the time, the leader). Team-ups with fellow comics icon Batman are a fan-favorite, inspiring many stories over the years. When paired, they are often referred to as the "World's Finest" in a nod to the "World's Finest Comics" series that mostly featured team-up stories between Superman and Batman during its 45-year history. In 2003, DC Comics began to publish a new series featuring the two characters titled "Superman/Batman". Minor supporting characters over the years have included Superman's technological