New research shows that permafrost soils hold massive quantities of mercury — nearly twice as much as is held in all other soils in the world, plus the mercury in the oceans and the atmosphere —
Just what exactly is permafrost? And what is happening now that it's warming up? To find out, we enter the Arctic Circle's secret world of ice and frozen history.
Snow is melting sooner and coming in later on the North Slope, and that, in turn, is having an affect on other ecological variables.
All Topics
All Countries
Any Date
Apply