As nature lovers, we prize the idea of places untouched by human influence. But new research shows that such places were few and far between as long as 12,000 years ago. This week paleo-ecologist Dr. Jacquelyn Gill is on the show to talk about the surprisingly strong effect humans have had on nature for thousands and thousands of years, and how knowing this changes our relationship with the natural world.
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Factually! with Adam Conover