Plague is usually tied to medieval Europe, black death, crowded cities, and mass mortality that reshaped entire societies. A ...

Add Yahoo as a preferred source to see more of our stories on Google. Two teeth from a man who lived approximately 4,000 years ago have been discovered to have an abundance of bacteria that primarily ...

Dr. Soumaya Zinet told Newsweek the "root cause" of gum disease and a simple way to prevent the incurable condition.

(CNN) — Two teeth from a man who lived approximately 4,000 years ago have been discovered to have an abundance of bacteria that primarily cause tooth decay and gum disease. The rare find could help ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Two teeth from a ...