The area between the Tigris and Euphrates rivers was home to ancient Mesopotamia--the "cradle of civilization." It was the birthplace of a number of innovations in areas such as transportation, irrigation, and the construction of cities. Readers take a deep dive into the ways residents of ancient Mesopotamia used what we now call STEM concepts in their everyday life. This cross-curricular approach to learning combines science, technology, engineering, and math with essential social studies concepts. The main text and sidebars support this unique approach to learning, and colorful photographs and illustrations enhance this exploration of the ancient world.