076Mass Production Method and Impact讲解

075Live Performance讲解

074Stone Tools and Pottery Fragments讲解

073Language as a Historical Source讲解

072Iron Working in Africa讲解

071Individual Performance and the Presence of Others讲解

070Impacts and Mass Extinctions讲解

069Imitation in Monkeys and Apes讲解

068Hunting and the Settling of Inner Eurasia讲解

067How Soils Formed讲解