The Prehistoric series is about early humans, the world they lived in, and the lives they led. It spans the Paleolithic Era (the Old Stone Age) through the Iron Age; from about 3.3 million years ago to about 1,000 years ago; from when humans first used stone tools to just before they began writing their history. In broad strokes and vivid examples, the series describes where and how these early people lived, the tools they used, the challenges of everyday life, and the development of culture, art, religion, and civilizations. Each title includes a timeline of major events. The Old Stone Age was the time of the earliest humans. Chapters cover how these early people left Africa and spread around the world, how they made tools to solve life's problems, and the role of Paleolithic women, who probably did a lot more than stay home and care for the kids. Each chapter includes attention-grabbing photos and fascinating facts. Sidebars go deeper, and prompts invite readers to think for themselves. A Timeline of the Paleolithic Era gives a big-picture view.