Fig. 2 Vibrational spectra of medieval human bones (Leopoli-Cencelle, Italy). Vibrational spectra of medieval human bones (Leopoli-Cencelle, Italy). Comparison with modern human bone samples (5) burned at 400°, 500°, and 600°C. (A) FTIR-ATR and (B) INS. G. Festa et al. Sci Adv 2019;5:eaaw1292 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).