Pingos are icy mounds that grow upwards from permafrost under the soil.
Global warming has created a feedback loop, wherein Arctic sunlight converts thawing ice into more CO2.
An arctic plant of the late Pleistocene age, over thirty one thousand years old, is growing again after a long frozen sleep.
According to a climate simulation by researchers at the University of Wisconsin, a snowless world would be both warmer and colder. Here's why.