Antarctica: a Frozen Land of Wonders, So Cold That Icicles Form Underwater

The Polar regions of the Arctic and the Antarctic are both cold. Beyond that, you can't really talk about conditions at one pole based on the conditions at the other. Case in point: Sea ice. Since 1979, there's been a significant decrease in Arctic sea ice—about 4% per decade—correlated closely to an increase in global average temperatures.

But Antarctica is different. Averaged out, sea ice around the Frozen Continent has grown by a little less than 1% per decade. From place-to-pl