On the inferno that was Earth, the habitable zone now lay above 10,000 feet. A whole new class of human diviners came into being who studied the patterns of rising and falling strata of air. These people could with some level of confidence be relied upon to foretell when certain areas would be safe or dangerous to traverse. In the Andes, these artisans were given the name ‘Aerofaunts,' and those atmospheric sprites they tried to predict, or harness were called ‘AirTides.'