It is readily acknowledged that our time has surpassed all epochs in history for the accumulation of technical knowledge physical power over our environment and economic might. It is less often pointed out however that our age has generated and continues to generate mythical material almost unparalleled in quantity and quality in the rich records of human imagination.More precisely people have very frequently reported the observation of wonderful aerial objects variously designated as flying saucers unidentified flying objects UFOs and so on among these narratives descriptions of landings made by these craft are commonplace and that quite a few accounts purport to inform us of the physical characteristics the psychological behaviour and the motivation of their occupants. But investigators have neglected to recognize one important perspective of the phenomenon the fact that beliefs identical to those held today have recurred throughout recorded history and under forms best adapted to the believers country race and social regime.