Henry Petroski writes “Falling Down Is part of Growing Up”. Petroski’s main idea is by describes the engineering and the structure on human bodies. Petroski is interesting in how we learn from our mistakes and to grow from them. At various point in the essay Petroski describes the human as cranes and forklifts. At other points in the essay Petroski refers to the dependability of human bodies. Petroski thinks human bodies more dependent then machine itself. We have learned to walk as surely as we learned to swim in the river with a stream or against a stream. People have the principles of machine and the structure, even more dependability than machines. Petroski describes his thoughts on the human engineering structure. He writes about how
