Today, amber is seen in beautiful jewelry. But did you know it's actually fossilized tree resin that's 40 million to 60 million years old? In this book presented by Scientific American, readers learn how this incredible gem forms, as well as about the fossilization process, how amber was first discovered, and what scientists can learn from pieces of amber. Beautiful full-color photographs enhance the understandable text. The main content supports knowledge building, a key component of the science of reading.