Bridges . It is not possible to name any other engineering structures ,. more closely related to all areas of human life and activity! Be it shaky log bridges or bold technical designs, They have always been and will be necessary for the development of trade. Transportation, for travel and just for people to communicate , Without them, modern civilization is impossible. Over the millennia, the construction of bridges has become a true art. The book will answer many questions about the construction of bridges, introduce bridges made of wood and stone, iron and steel, concrete; with bridges-record-holders . Perhaps this book will not only answer many questions about the construction of bridges, but will also awaken in some of the young readers the desire to someday become a builder himself. Other books in the series "What Is What": Natural Disasters Weather Water Mountains Caves. Bees, Bees, Wasps Elephants Fish Cats. Geographic Maps Star Flags Witches Online. Arctic and Antarctic Indians Horses Time Dinosaurs. Ancient Russia Revival Treasure Dolls Tropical Forest