A national tragedy in Japan was the catalyst for the construction of the world's longest suspension bridge. But it took 40 years to build, and required inventing new technologies along the way to make it happen. Do you know its name?
We are a species of bridge builders. Since time out of mind, humans have engineered structures to vault over obstacles with the help of logs, stone, steel and, of course, ingenuity. So, what keeps our bridges steadfast and strong?