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The Great Inca Rebellion

Mass graves and forensic evidence reveal a complex truth about how the Inca Empire fell.

Saving the National Treasures

A team of experts takes on the preservation of the original Declaration of Independence, Constitution, and Bill of Rights.


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Galileo's Battle for the Heavens

Galileo struggles to persuade church authorities of the truth behind his astonishing discoveries about the cosmos.

Spies That Fly

A new generation of pilotless planes fly, spy, and bomb in dangerous places.