The introduction of robotics in manufacturing, medicine, exploration, and many other fields has created a world of robots that assist and sometimes replace people in all kinds of jobs. Robots have a tremendous impact on our world. They do jobs that no human has ever done or is capable of doing. This book provides readers with a before-and-after look at the way the world has changed. Each book in the NGSS-aligned It Changed the World series introduces readers to some amazing inventions. Interesting facts and vivid photos show how these inventions changed, and continue to change, the lives of people around the world. Each book includes a glossary, comprehension questions, and an extension activity for further learning.