It’s a vicious cycle: As the weather warms, the Earth’s permafrost is melting, releasing greenhouse gases that are going to make the planet even hotter.

River Erosion

Because ice makes up a good portion of the underground foundation of northern Alaska, thawing has dropped the landscape as much as 3 feet in some places.

Spruce Aphid (Elatobium abietinum) Damage

Alaska’s tundra landscapes carpet a good portion of the state, from the North Slope to the elbow of the Alaska Peninsula. Researchers say it's slowly sinking in places -- as much as a fifth of an inch each year.

Early Rhubarb (Rheum rhabarbarum) Sprout

Pavlov Volcano provides spring show and showers