As northern polar regions continue to warm at a rate twice the global average, this permafrost begins to thaw. (eos.org)
Charon's color pattern is simpler, dominated by neutral low latitudes and a reddish northern polar region. (science.sciencemag.org)
As northern polar regions warm, the temperature contrast between them and temperate zones — such as the continental United States — diminishes. (sciencenewsforstudents.org)