As a boy, Albert Einstein was not a remarkable student. One teacher told him that he “would never amount to anything.” Subjects that required rote memorization were challenging for him, and evidently he was a daydreamer. But he had a curious mind, ever seeking answers to questions that interested him. He was fascinated with, in particular, how invisible forces affected the world. His insatiable curiosity led to a Nobel Prize for physics, and his theories changed the world.