In these 4 all-new titles-each with its own clip-art CD and wall chart-DK shines its Eyewitness spotlight on vital topics from the past, present, and future. While Mesopotamia explore the cradle of civilization and Great Scientists reveals the minds that shaped the modern world, China investigates the present-day culture of the most populous country on the planet, and Oil takes a look at the controversial substance responsible for the beginning-and, if we're not careful, the end of life as we know it today.