The sound artist Janek Schaefer got a commission to make something "about Minnesota". As a Brit, he had to ask friends what defined Minnesota for Minnesotans. They gave him one word: weather. So, during a storm, Schaefer sent a cell phone up into the stratosphere in a weather balloon above Minnesota, to capture the sonic essence of that frigid state. He wound up with some literally cool sound. Produced by Michael Raphael.