National Geographic magazine, April 2015. Reproduced with permission.

Graphics: Fernando G. Baptista, Daniela Santamarina, and Emily M. Eng, NGM Staff. Samantha Welker; José Miguel Mayo Hernández, Angelica Quintero; Research: Amanda Hobbs. Text: Jeremy Berlin, NGM Staff. Photos: Kenneth Garrett. Design and development: Kevin DiCesare, Joel Fiser, and Jaime Hritsik, NGM Staff. Producer: Amy Bucci, NGM Staff. Sources: Jon Coulston, University of St. Andrews, Scotland; Lynne Lancaster, Ohio University; National History Museum of Romania (plaster cast).

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