Alexander Koch joined me to discuss the groundbreaking new scientific paper, Earth system impacts of the European arrival and Great Dying in the Americas after 1492, which he is a lead author of. As the title suggests, the research indicates that dramatic global climatological changes resulted from Indigenous peoples first contact with Europeans in the Americas in 1492—an event that resulted in massive population decline across the continents. Koch and his colleagues’ research has been making the rounds in the media, getting extensive coverage at The Guardian, BBC, The Hill, and numerous other outlets.

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