Discover the cosmological secrets behind America’s ancient cities. Scientists explore some of the world’s largest pyramids and 3D-scan a lost city of monumental mounds on the Mississippi River; native elders reveal ancient powers of the sky.

Discover how resistance, survival and revival are revealed through an empire of horse-mounted Comanche warriors, secret messages encoded in an Aztec manuscript and a grass bridge in the Andes that spans mountains and centuries.

Combine ancient wisdom and modern science to answer a 15,000-year-old question: who were America’s First Peoples? The answer hides in Amazonian cave paintings, Mexican burial chambers, New Mexico’s Chaco Canyon and waves off California’s coast.

Explore the rise of great American nations, from monarchies to democracies. Investigate lost cities in Mexico, a temple in Peru, a potlatch ceremony in the Pacific Northwest and a tapestry of shell beads in upstate New York whose story inspired our own democracy.