1. According to Levinger, Einstein is sometimes called the Newton of the twentieth century because his theory of general relativity challenged the ideas of gravity and light that Sir Isaac Newton had given to the world two centuries earlier. What were Newton's ideas about gravity and light? How are Einstein's ideas different?

2. How have more recent scientists, such as Stephen W. Hawking, amended some of Einstein's theories?

3. What are some of the advances in medical science that have resulted from the development of atomic energy?

4. Some of the advances in the quality of life that Levinger predicted would result from atomic energy have not come about in the forty years since the book was written. Do you think they will ever take place, or was Levinger overly optimistic?

5. Disposal of nuclear waste is one of the greatest drawbacks to the development...