Superhuman Strength, Super Strength or Enhanced Strength is the ability to lift and/or press volumes of mass far in excess to that normally possible for a human being functioning in Earth gravity. This term is also attributed to non-human characters when describing their superior strength. The writers stated that Superman's greatest strength is the energy of the yellow sun increasing the character's strength. But that some of his curious feats of strength were the effect of his flying power which was being established as a limited gravitational power precisely to explain some of Superman's strange feats of strength. He could lift an object of incredible size in the air, but back on the ground he would have difficulty lifting it.