Ships are the largest moving objects humans have ever made. Their basic design has changed very little over the past 3,500 years, yet they have played a major part in human history. This title explores the world of ships and boats, from the earliest hulls made from wood and skin, to modern cargo ships and powerful speed boats. Practical and easy-to-do projects will show you how ships work and what makes them go, what makes a submarime dive and resurface and more.