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NOVA
Athens: Birth of Democracy Preview
Follow archaeological investigations into the dramatic origins of democracy in Greece 2,500 years ago. Mass graves and ancient ruins where tyrants were murdered shine new light on the birth of a revolutionary form of government.
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Paleontologist Kirk Johnson explores the dynamic history—and future—of ice at the poles.
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Discover the science behind Leonardo da Vinci's masterpieces—and Mona Lisa's iconic smile.
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Amazing fossils reveal how mammals took over after an asteroid wiped out the dinosaurs.
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Discover why scientists and entrepreneurs alike have their sights set on the Moon again.
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New archeological evidence shows the stunning engineering of the Great Pyramid of Giza.