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 in film and Burton signed on with a pay-or-play contract of $5 million. Warner Bros. originally planned on a theatrical release date for summer 1998, the 60th anniversary of the character's debut in "Action Comics". Nicolas Cage, a comic book fan, signed on as Superman with a $20 million pay-or-play contract, believing he could "reconceive the character." Peters felt Cage could "convince audiences he [Superman] came from outer space." Burton explained Cage's casting would be "the first time you would believe that nobody could recognize Clark Kent as Superman, he [Cage] could physically change his persona." Kevin Spacey was approached for the