A Christian merchant named Cosmas, who had journeyed to India, and was accordingly known as COSMAS INDICOPLEUSTES, wrote, about 540 A.D., a work entitled "Christian Topography," to confound what he thought to be the erroneous views of Pagan authorities about the configuration of the world.

What especially roused his ire was the conception of the spherical form of the earth, and of the Antipodes, or men who could stand upside down.

He drew a picture of a round ball, with four men standing upon it, with their feet on opposite sides, and asked triumphantly how it was possible that all four could stand upright?
In answer to those who asked him to explain how he could account for day and night if the sun did not go round the earth, he supposed that there was a huge mountain in the extreme north, round which the sun moved once in every twenty-four hours.

Night was when the sun was going round the other side of the mountain.

He also proved, entirely to his own satisfaction, that the sun, instead of being greater, was very much smaller than the earth.