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

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 ...

(NewsNation) — Too much exposure to mercury could lead to mercury poisoning. Mercury is a naturally occurring metal found in rocks in the Earth’s crust. It has a silver appearance, lending to its ...

It is rated as one of the top ten chemical poisons endangering human health and the natural world. Tiny drops of this poison can be found in human teeth, in fresh fish, in light bulbs, paints, ...