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 DVD/home video releases of "Superman", "Superman II", "Superman III", and "Superman IV". The set was valued at US$49.99 for the DVD release and US$29.99 for the VHS release, and received positive reviews. The four Christopher Reeve films were again released on November 28, 2006, in new DVD releases to coincide with "Superman Returns", also released in that year. "Superman" was released in a four-disc 'special edition' similar to "Superman II", which was released in a two-disc special edition. Both "Superman III" and "IV" were released in single disc 'deluxe editions', and all four releases were available together in "The Christopher