Every day, the world's scientists are working to solve some of the most thrilling mysteries on Earth. This True Book series highlights some of the incredible ways that scientists search for answers to our biggest questions. Readers will discover how scientists conduct experiments in extreme situations, how some of the world's most advanced laboratories have benefitted scientists, and much, much more. From China's remarkable Danyang-Kunshan Grand Bridge, which spans more than 100 miles, to the amazing Millau Viaduct, which allows drivers to travel almost 900 feet above the ground in southern France, bridges rank among man's most incredible engineering feats. Readers will learn about some of the biggest and most unique bridges in history, from how they were planned and built to how they have stood the test of time. Features: Engaging sidebars highlight some of history's most remarkable scientific discoveries Timelines illustrate the ways our knowledge of science has changed over time Glossaries explain difficult scientific terms in a way that makes them easy to understand Eye-catching images give readers an up-close look at scientific procedures.