He posited that the western half of the temperate zone on the other side of the globe from Greece might be habitable and that, because of symmetry, there must be in the Southern Hemisphere a temperate zone corresponding to that in the northern. He thought, however, that the excessive heat in the torrid zone would prevent the exploration.

The torrid zone was an explanation of Earth's Climate Based on observation and natural reasoning by thinkers such as Aristotle and Parmenides.