Rocks and Fossils reveals how rocks, minerals and fossils provide keys to past times. It reviews the internal workings of our planet, surveys Earth's ancient past and describes what happened in cataclysmic times when life on Earth almost died. It surveys the fossil record to show how prehistoric lifeforms were linked to life on today's Earth, and why some creatures survived while others became extinct. It describes how a study of landscape features can provide insight into the underlying nature of planet Earth, and explains how minerals form and why some have become precious to humans. Take a journey through Earth's past and discover the intriguing world beneath our feet.