The 85-year-old sci-fi writer gave a stunner speech at the National Book Awards last month about the problem with capitalism and the power of imagination and great literature.

One scientist calls the writer the greatest explainer of the age. In this second part, Bill Moyers talked to Dr. Asimov about science, education and the universe.

In this classic interview, Isaac Asimov explains that he is not an enemy of religion, how scientists are among the most moral people he knows and the urgent need to check population growth.