Ancient Mayan water filters stopped a lot—just not mercury poisoning

Over time, cinnabar washed away from rainfall and seeped into the surrounding soil and water. But while a contaminant like ...
Smithsonian Magazine

The Sweat of Tourists Has Covered Michelangelo’s Sistine Chapel Fresco in a White Film. Now, the ‘Last Judgment’ Is Getting a Much-Needed Cleaning

Patches of calcium lactate have dulled the colors of the famous 16th-century mural, which hasn't been cleaned since 1994.
Ancient Origins

The Maya's Purest Water Was Also Their Slowest Poison

New research on the ancient Maya city of Ucanal in northern Guatemala reveals that its engineers maintained biologically clean drinking water for nearly 1,500 years, an extraordinary achievement in a ...
The Facts

SUNDAY SERMON: Jesus shows Samaritan power of 'living water'

We may think we know about the Samaritan woman that Jesus met at the well. But do we? We usually think of her as a sinful ...