Natural environments such as the air currents, temperatures, waters, and topography were thought to shape humans, animals, and plants. For humans, the impact was physical, behavioural, and cultural. For animals, the impacts were mostly physical (e.g., oxen in Scythia have no horns because of the cold). This is typically referred to as environmental or climatic determinism. Early explicit examples of this idea include the HippocraticAirs, Waters, Places and occasional comments in Herodotus, but arguments for such a relationship between identity and environment as early as Homer’s Odyssey and Hesiod have been made.1 There is a long-standing tradition beginning with Homer and extending through the Roman imperial period of humans, animals, and their hybrids being associated with geographic distance from an imagined centre, dwelling in designated climate bands, or being earth-born or autochthonous (gēgenēs, autochthōn) that may reflect early forms of environmental determinism. The ideas continue to circulate in much the same form as found in the Hippocratic Airs in Roman authors such as Vitruvius, Manilius, Pliny the Elder, and Vegetius.