Dental calculus is the richest known source of ancient DNA in the archaeological record. That stubborn mineralized plaque, once treated as little more than an unpleasant byproduct of life, has become ...

Add Yahoo as a preferred source to see more of our stories on Google. Summer Decker, PHD, (left) 3D Imaging Lead for Keck Medicine of USC, and Diane Perlov, PHD, (right), Senior Vice President for ...

Millennia ago, when ancient people did not know what toothbrushes were, food particles and microbes clung stubbornly to their teeth. These plaques mineralized over time to form crusty, hard tartar.

Meet Tetinebefou—the wizard-doctor, priest, and royal dentist—whose newly discovered tomb reveals dazzling secrets about health and society 4,000 years ago.