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 end; the first such story was in "Superman" #17 (July–August 1942). This was common plot in comic book stories prior to the 1970s. In a story in "Action Comics" #484 (June 1978), Clark Kent admits to Lois that he is Superman, and they marry. This was the first story in which Superman and Lois marry that wasn't an "imaginary tale." Many Superman stories since then have depicted Superman and Lois as a married couple, but about as many depict them in the classic love triangle. Another major supporting character is Jimmy Olsen. He is a young photographer at the "Daily