Thawing permafrost is triggering mudslides onto a key road traveled by busloads of sightseers. Tall bushes newly sprouted on the tundra are blocking panoramic views. And glaciers are receding from convenient viewing areas, while their rapid summer melt poses new flood risks. These are just a few of the ways that a rapidly warming climate…

Move over, polar bear. The Pacific walrus may be the new icon of global warming. Like polar bears, walruses are dependent on floating sea ice to rest, forage for food and nurture their young. Like polar bears, walruses are suffering because of a scarcity of summer and fall sea ice in Arctic waters that scientists…