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Explore what it takes for novice runners to make it through a classic test of endurance.
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Mass graves and forensic evidence reveal a complex truth about how the Inca Empire fell.

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As the Earth heats up at a dangerous rate and fossil fuels become scarcer, ordinary...
NOVA  ·  Episode 3412

Secrets of the Samurai Sword


The ancient art and science behind a Japanese warrior's prized weapon

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