Wherever they go, humankind leaves evidence of their existence. That's how we know about early American civilizations, thousands of years before Columbus's journeys. In this fascinating book, readers will become anthropologists, learning the different artifacts people leave behind that can become buried far below our feet, sight unseen for years. That includes skeletons! They'll also learn how scientists discover such relics and how our knowledge of history increases because of such finds. Vibrant photographs of "what's under our feet" will draw readers' eyes and interest while inviting text informs them about this exciting subject.