Hippolytus

“ Wherefore, that the dominant principles of generation are contraries,—namely, heat and cold. And that the expanded earth is wafted along upon the air, and in like manner both sun and moon and the rest of the stars; for all things being of the nature of fire, are wafted about through the expanse of space, upon the air. And that the stars are produced from earth by reason of the mist which arises from this earth; and when this is attenuated, that fire is produced, and that the stars consist of the fire which is being borne aloft. ”

“ But that there is such a species of air, when it is most even, which is imperceptible to vision, but capable of being manifested by cold and heat, and moisture and motion, and that it is continually in motion ”