Imagine you’re standing in the middle of a glacial expanse on the coast of Antarctica. It’s a balmy minus 18 degrees Fahrenheit with windchill, but with your snug parka on, you can feel the sun doing its darndest to warm your cheeks. In the distance, the peak of Mount Erebus, the world’s southernmost active volcano, exhales an icy breath into the crisp blue sky. The frozen sea is beginning to…