Support WBURA Blue Clue In Medieval Teeth May Bespeak A Woman's Artistry Circa A.D. 1000Play03:35Download AudioNell GreenfieldboyceJanuary 09, 2019 ShareA bit of lapis lazuli — a rich blue pigment — is trapped within a central tooth's dental tartar on this lower jaw of a European woman who died sometime between A.D. 997 and 1162. (Science Advances)