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
The Death of Superman of Steel" #1 became the bestselling comic book issue of 1986. Byrne also wrote and illustrated "Action Comics", and scripted "The Adventures of Superman" with artist Jerry Ordway after the previous writer Marv Wolfman left. Under Byrne, a new Superman comic was released every week and each series maintained continuity with each other. He spent two years on the Superman comics before leaving in 1988, becoming dissatisfied with DC's lack of "conscious support" for him and that the version of the character which DC licensed for merchandising contradicted Byrne's representation of him in comics. As a result of Byrne's departure,