Modern Marvels

Building a Skyscraper (3): The Human Environment (11x37)

Ημερομηνία προβολής: Σεπ 07, 2004

Skyscrapers are an extraordinary feat of human engineering: exposing millions of pounds of concrete and steel to the enemy forces of wind and gravity. Each of these tools has evolved over the 100-plus year history of the skyscraper era.