This plant (left), found along the slopes of Mount Everest, grows in individual layers (right) that have been used to understand how atmospheric mercury levels have changed in the past 40 years.

Toxins released by long-extinguished fossil fuel fires and gold smelters are showing up in the bodies of Arctic wildlife, according to new research pointing to mercury released by pollution hundreds ...

This plant (left), found along the slopes of Mount Everest, grows in individual layers (right) that have been used to understand how atmospheric mercury levels have changed in the past 40 years. Image ...