Tattoos, and other forms of body decoration, are as old as humanity itself. But what can we know about the skin of long-past people that no longer exists? I talk to Aaron Deter-Wolf, Prehistoric Archaeologist for the State of Tennessee’s Division of Archaeology and one of the world's experts on the archaeological study of tattooing, to get some answers.

Follow Aaron on Instagram @archaeologyink - it's a fascinating page.

I wrote a book, and it comes out in July! You can preorder The Verge: Reformation, Renaissance, and Forty Years that Shook the World here.

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