This long-running, award-winning documentary series focuses on science, its many applications, speculation, history and researchers. Inspired by the BBC documentary program ``Horizons, '' the U.S. series frequently features interviews with scientists directly involved in the topic at hand, and sometimes even boasts footage of a particular discovery.

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Secrets of the Parthenon

Scholars probe the planning and construction of the Parthenon, erected by the ancient Greeks as a temple to the goddess Athena.

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