As shown on the History Channel, "How the Earth Was Made: Sahara" explores the geologic and climatic history of the Sahara Desert, showing how fossil evidence, marine sediments, radar imaging, and archaeology reveal a landscape that was once an ocean, later a tropical wetland, and repeatedly a green corridor with lakes and rivers. The documentary explains key Earth science concepts including plate tectonics, fossils, the Tethys Sea, erosion, aquifers, climate change, monsoons, and orbital wobble cycles. It also connects geology to world history through evidence of human migration, ancient settlements, and the environmental changes that helped shape early Egyptian civilization. This content supports curricula in Earth science, geology, climatology, archaeology, and ancient world history. Part of the "How the Earth Was Made" series.