Complex sentence: The final episode looks at the Amazon rainforest-billed as the world's last great wilderness-but even here, geoglyphs uncovered following deforestation in the 1970s and terra preta, provide growing evidence for ancient cities in the heart of the' virgin forest'.
Split into simpler sentences: The final episode looks at the Amazon rainforest-billed as the world's last great wilderness. However, the discovery of geoglyphs uncovered following deforestation in the 1970s and terra preta, provide growing evidence for ancient cities in the heart of the' virgin forest'.