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NOVA· Season 37 · Episode 11

Riddles of the Sphinx

S37E11·January 19, 2010·1h·PBS

A marvel of ancient engineering is vanishing. Can it be saved?

Streaming on (US) See all

PreviousBuilding Pharaoh's ShipS37E10 NextGhosts of Machu PicchuS37E12

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Season 37 ranked & reviewed Best of NOVA Ratings graph

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