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 speculated its sales were propelled by hopes it would become valuable. Gerard Jones, who wrote the "Green Lantern" tie-in story, theorized that the phenomenon may have been due in part to the then-relatively recent poor ending of the "Superman" film franchise. Sims recalled that when he worked in a comic book store in 2009, some customers were shocked that DC was still publishing Superman comics, as they did not read the story's conclusion. Generally, DC writers have denied "The Death of Superman" was a publicity stunt. Jurgens, for instance, stated he did not anticipate the attention, while Stern believed the