This edition integrates physics, chemistry, astronomy, earth sciences, and biology for students with little or no science background. Many of the Science News boxes are updated to show hot topics, and each copy of the book comes with a Study Guide. It also contains: Random Walk essays that serve to show how science is a part of the world around us; Science of Life, Ongoing Process of Science and Science News boxes; a Great Ideas Across the Sciences study chart, and Stop and Think questions that challenge students to think critically about the implications of a scientific discovery or principle.