How do cats purr? How does a homing pigeon find its way home? Why do baby alligators need cavities? These are just a few of the questions that scientists tackle in this book of Science in Action. The twelve explorations cover some of kids' favorite animals. The creatures--some lovable, some creepy, and all amazing--are the reader's gateway into the world of real science. And the reader will discover that science is much more than a collection of facts--it offers adventures in discovery. The reader comes along as scientists learn surprising new things, and as they end up with new and fascinating questions. Many full-color illustrations help draw young scientists into this stimulating book.