9. Transportation

Getting people and things from here to there is essential. Whether crossing town, a river, or an ocean, or even just going upstairs, speed, safety, reliability, and comfort are fundamental concerns. As the world's population has skyrocketed, the need for mass transportation has become more important than ever. Engineers have risen to the challenge. From the bicycle to the bullet train, our ability to navigate our world has improved dramatically. The following stories highlight some of the remarkable feats of engineering, inventors, and inventions that have revolutionized our ability to get from here to there.