If Bigfoot is real, what exactly is it? Is it simply an elusive, distant cousin of us humans, a creature who occupies an evolutionary branch in our family tree, and who chooses to live in the deep wilderness, far away from human population centers? Or is Bigfoot something else altogether: a creature with extraterrestrial origins? In this episode Phil interviews a guest who has developed a new, radical explanatory model of Bigfoot (and other cryptids) in an effort to better map observed behaviors, first-hand encounter reports, and physical evidence.