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Secrets of Lost Empires
An exploration of the "long-forgotten secrets of early architects and engineers." Medieval Siege is about early weapons and life in castles; Pharaoh's Obelisk demonstrates how these large objects were shaped, transported, and erected; Easter Island looks at the moai statues; Roman Bath features sophisticated plumbing; and China Bridge demonstrates the use of bamboo to build a bridge. Sections contain interactive activities to demonstrate the concepts presented, suggested Web and other resources, and teacher's guides.
http://www.pbs.org/wgbh/nova/lostempires/

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