Q'eswachaka suspension bridge. Q'eswachaka, Apurímac River, Canas Province, Cusco, Peru.

A Dozen Indigenous Craftsman From Peru Will Weave Grass into a 60-Foot Suspension Bridge in Washington, D.C.

The ancient technology used lightweight materials to create soaring 150-foot spans that could hold the weight of a marching army

The abandoned city of Machu Picchu is one legacy of the Spanish conquest of the Incas. Traces of air pollution in a Peruvian ice cap are another.

Spanish Conquest of the Incas Caused Air Pollution to Spike

A sample of Peruvian ice has revealed a surge in pollution linked to mining that wasn't exceeded until the Industrial Revolution

The Mystery of This 500-Year Old Mummy Is Only Beginning To Be Solved

For more than a century, no one in Germany knew where this mummy came from

Villagers construct a new bridge over the Apurimac River, in Huinchiri, Peru, in 2012.

The Earliest and Greatest Engineers Were the Incas

Smithsonian Secretary G. Wayne Clough treks to Peru to see how Machu Picchu was built

Inspired by recent archaeological research, the people in the Cuzco region of Peru are rebuilding terraces and irrigation systems and reclaiming traditional crops and methods of planting.

Farming Like the Incas

The Incas were masters of their harsh climate, archaeologists are finding—and the ancient civilization has a lot to teach us today

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