What lies beneath the surface of the world's oceans? Join the adventure as the depths of the ocean are explored in this fascinating new book that brings the wonders of the ocean to light. * Where did all the salt come from? * What keeps the oceans from freezing? * Why do icebergs float? * What causes the tides and why are they beneficial? * How deep are the oceans? * Includes FREE pull-out poster As the fourth entry in the "Wonders of Creation" series, this book answers the above questions and more, with full-color photos, charts, graphs, and illustrations that bring the murky, mysterious depths of the ocean to life. This superb book is a fantastic supplement to any homeschool curriculum and contains Scripture references in which God speaks about the oceans. All ages from a middle-school level and up will enjoy this informative and fascinating book.