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Preview: Season 20 Episode 4 | 32s | Video has closed captioning.
Recent discoveries, including funerary urns with highly decorative patterns, and technological advances like the remote sensor system known as LiDAR, are shedding new light on our understanding of pre-Columbian societies in the Amazon. Scientists speculate the rainforest was home to between 8 and 10 million people living in large, well-established communities.
Problems Playing Video? | Closed Captioning