We humans have always been fascinated by our world, and over hundreds of thousands of years we've built up a body of knowledge about the things around us, so we know what they are, how they work, how they interact, and what the processes are underlying everything from the patterns birds make when they fly in information to the forces that hold us all on the ground. This is science, and it is one of the most inspiring and vast voyages that mankind has ever made. This second revised edition of the How It Works Book of Junior Science has been jam-packed full of the most amazing things about our planet, our bodies, the animals we share the world with, and the science supporting it all. It's been written to feed young minds with the incredible stories behind supervolcanoes and moonquakes, magnetism, deep sea creatures and the cells in your body, and to inspire the next generation of scientists to continue exploring, as there is still so much to discover. Enjoy the book!