The Middle Ages was a period of great scientific and technological advancement. Easy-to-understand text and brilliant full-color illustrations will help children follow the advancements in medicine, military weapons, and astrology up until 1500. Topics include - the power provided by watermills and windmills - how the development of textiles affected trade with China and the Middle East in the 1220s - how African craftworkers worked with metal - medieval peoples' belief in the four humors, and the surgical procedures and herbal remedies used - astrological inventions such as China's water clock