(I) “Flying saucers” is the name given to saucerlike shapes which have, on occasion, been seen travelling through the atmosphere. (II) For some time speculation was rife, especially in America, as to what they were. (III) So it is time they were taken seriously and studied scientifically. (IV) Now, however, it is believed that they are nothing more than atmospheric phenomena. (V) That is to say they are as unreal as mirages or mock suns caused by unusual atmospheric conditions.