Adena Culture and the Early Woodlands Period

S1, E6: In modern-day Ohio, the continent's first coherent civilizations evolved about 3,000 years ago, bringing together previously far-flung Archaic practices. Meet the Adena, the first ancient American culture with wide-ranging influence. Known for their conical burial mounds and shared concept of an afterlife, they also might have been the continent's first habitual tobacco smokers.