Climate change is happening faster and in a dramatically more visible way in the Earth’s cryosphere: the snow and ice-dominated regions around both the North and South Poles, and in high mountains. Whether high latitude or high altitude, temperatures in these places already have warmed by at least twice the global average. As a result, the ecosystems and communities in these fragile and beautiful places are disintegrating, in some cases right beneath our feet, as ice and ground (permafrost) melt away.