Faced with his missionary brother's move toward atheism, the author had to figure out what he really believed about the origin of the earth. He asks, "Which is harder: 1. Designing a zebra? or 2. Designing a cell that builds an ecosystem for a zebra to live in—then builds the zebra, too?" Whatever your current ideas about the age of the earth and evolutionary theory, you will learn something. Thought-provoking, well-researched.