Every new and groundbreaking archaeological discovery refines our understanding of human history. This title examines the exploration and study of Chaco Canyon. The book explores the lives of the sites builders, traces its discovery and scientific investigation, and discusses future study and conservation efforts. Well-placed sidebars, vivid photos, helpful maps, and a glossary enhance readers understanding of the topic. Additional features include a table of contents, a selected bibliography, source tes, and an index, plus a timeline and essential facts. Aligned to Common Core Standards and correlated to state standards. Essential Library is an imprint of Abdo Publishing, a division of ABDO.