76:4.3

Adam and Eve, like their brethren on Jerusem, were energized by dual nutrition, subsisting on both food and light, supplemented by certain superphysical energies unrevealed on Urantia. Their Urantia offspring did not inherit the parental endowment of energy intake and light circulation. They had a single circulation, the human type of blood sustenance. They were designedly mortal though long-lived, albeit longevity gravitated toward the human norm with each succeeding generation.