Flat patches on ancient Europeans' teeth reveal possible cheek piercing tradition
A biological anthropologist at the University of Coimbra in Portugal is hypothesizing that the mysterious flat patches found ...
Colorado Public Radio23d
Colorado Springs, Brown Teeth, and Fluoride
When Frederick McKay got to Colorado Springs in 1901 to set up his first ... was alarmed to find teeth the color of chocolate in most of his patients — "The Colorado Brown Stain" they called ...