Life as we know it couldn't exist without water, and water cannot exist without hydrogen. This essential element plays an important role in both human bodies and stars. What other incredible things can this life-giving element do? Readers of this informative book will find out. They'll learn how hydrogen was discovered and the many ways humans use it. A sleek design, illustrations, and photographs help readers engage with the text. A concluding quiz lets them test their knowledge. This accessible text is the perfect introduction to this key science topic.