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
John Byrne (comics) (July–Sept. 1986), the first issue of which was marketed with two different covers illustrated by Byrne, the first use of variant covers by the American comics industry. Byrne penciled the six-issue DC Universe crossover miniseries "Legends" (Nov. 1986 – May 1987) during this time. He wrote and drew two monthly Superman titles with the hero's present-day adventures: a new "Superman" title beginning with issue #1 (January 1987) and "Action Comics", in which, beginning with issue #584, Superman teamed up with other DC characters. The original "Superman" book was renamed "The Adventures of Superman" starting with issue #424 and was initially