David Quammen is the foremost science writer of our time, specializing in the linked fields of ecology and evolutionary biology. Quammen has lived in Bozeman, Montana, since 1973 and was a columnist at Outside magazine for almost two decades. He is a longtime writer for National Geographic (Quammen is the only author ever asked to write an entire issue of the magazine, an exploration of his home country in Montana calledYellowstone: A Journey through America’s Wild Heart). His 2012 book Spillover – exploring how the destruction of natural ecosystems around the world leads to new viruses crossing over from wildlife to human beings – has made him one of the most sought-after and informed voices on the Covid pandemic. Join David and Hal for an engaging, thought-provoking and exquisitely timely conversation.