This book is suitable for ages 7-14. The Middle Ages was a period of great scientific and technological advancement. Trade increased as towns began to grow, and medieval people found more efficient ways of doing work by inventing new machines. The inventions of the heavy plow, horseshoes, and harnesses resulted in more food to eat, and more crops for trading. Easy-to-understand text and brilliant full-colour illustrations will help children follow the advancements in medicine, military weapons, and astrology up until 1500. The topics include: the power provided by watermills and windmills for...