Threshold is a podcast and public radio show that specializes in making complex environmental topics personal, immediate and real. Each season, we explore one story of pivotal change from the natural world. In season one, we told the complex story of the American bison. In season two, we went on a circumpolar journey to find out what the Arctic is, how it is changing, and why that matters. We're looking for smart, energetic, innovative people to be part of this adventure!