Just two weeks ago and still chilling our memories, a cold front moved into the northern states. In Pennsylvania as temperatures reached 15 below (Fahrenheit) and wind chills dipped further to 25-40 below, a new term entered the media vocabulary: “arctic vortex.” Of course, we have had temperatures dip below zero before and wind chills that are brutal. That is … [Read more...] about Perspectives on an arctic vortex and rock pigeon