The Season 1 finale looks at the Namib Desert in southern Africa. The world's oldest desert, it stretches for 1200 miles along the coast; and it includes part of the Namib-Naukluft National Park, which is Africa's oldest game reserve.
The Gobi Desert in Asia is examined. Sparsely populated, it is home primarily to nomadic herders. Deforestation, overgrazing and water depletion has led to its expansion, but China is attempting to stem its growth by planting forest buffers along its outer edges.
The Atacama Desert, which stretches for 600 miles along the coastlines of Chile and Peru, is examined. The arid climate has helped preserve its cultural past, including the world's oldest mummies; village ruins; and 1000-year-old giant geoglyphs that guided caravans through the desert.