A 5,500-year-old skeleton from the Americas has yielded the oldest genetic evidence yet of a bacterium closely related to the ...

Syphilis is back on the rise across the United States after being nearly eliminated in the late 1990s and early 2000s. But in the Navajo Nation, a solution to curbing the now national epidemic is ...

And this means we might have been thinking about the origins of syphilis in an entirely wrong way. While the French ...