As shown on the History Channel, "How the Earth Was Made: The Grand Canyon" explores how geologists use rock layers, fossils, river sediments, and radiometric dating to explain the formation of the Grand Canyon in Arizona. The video covers major Earth science concepts including erosion, plate tectonics, uplift, sedimentary rock, limestone, shale, sandstone, volcanic activity, and the Colorado River’s role in canyon cutting. It examines evidence from Vishnu schist, garnets, fossil shells, ancient lakes, and lava flows to trace nearly two billion years of geologic history and the canyon’s much younger age of about 5.5 million years. The program supports school curricula in geology, Earth history, scientific inquiry, and U.S. geography through real-world examples of how scientists interpret evidence and revise theories. Part of the "How the Earth Was Made" series.