Concrete : from the ground up
"From a lowly mixture of stone, sand, water, and cement have sprung sidewalks, streets, and skyscrapers, sturdy lighthouses and magnificent palaces, long bridges and massive dams. In ancient building practices, in modern engineering, and in the architecture of the future, humble concrete plays a mighty role in the creation of the human-made world. Brimming with facts and spiced with clever running narrative in the form of repartee-filled speech b...