This thesis is an interdisciplinary study that traces colloquial engagements with extinction in Victorian print culture (1859-1901). Extinction’s broad cultural life demonstrates the extent that scientific and cultural topics intricately entangled within Victorian print networks. Non-specialist Britons absorbed and transmitted evolutionary (particularly, Darwinian) knowledges within public discursive spaces instead of exclusively institutional settings. Class stratification did not bar non-specialists from absorbing and perpetuating cultural conversations about collapses, conservationism, and overconsumption. My project thus seeks to amend the critical discourse that assumes that Victorians passively accepted impending catastrophes or paid scant attention to extinction pressures. I recover multiple subjects formerly hidden in the vast Victorian archives: obscure non-specialists of the working and middle classes, obscurer animals cohabiting the Victorian’s everyday spaces, and the popular (and in some cases, underappreciated) literary texts demonstrating how Victorians circulated extinction discourses. Chapters One and Two explore the non-literary side of print culture, recovering widely disseminated but now largely unknown periodical artifacts (the domain of Punch, The Times, or Funny Folks). Chapter One focuses on cultural reactions to collapses of England’s domestic birds. Chapter Two traces the economized conservationism of the Brooke Brothers, popular game and meat traders. In both chapters, I determine how experienced evolutionary knowledges revealed the human-caused tenuousness of a trans-species milieu. Chapters Three and Four concentrate on scientific romances originally serialized in periodicals, including my key literary case studies, H.G. Wells’s The Time Machine (1895) and M.P. Shiel’s The Purple Cloud (1901). Musing on extinction led to a mindset that acknowledged entanglement with nonhuman others as an ethical imperative. However, some case studies demonstrate a profound ambivalence toward the human’s self-extinction, resulting in a complicated engagement with future forms that often re-privileges the human from within a radical ontology. / Thesis / Doctor of Philosophy (PhD) / This study examines how Victorians absorbed and communicated ideas about extinction, especially as informed by evolutionary theory. Throughout Victorian newspapers, journals, and literature, extinction was adopted for disparate uses. A culturally, economically, and philosophically muddied topic, extinction provoked reconsiderations of the natural world and humankind’s place within it. I begin by examining advertisements, articles, and illustrations from popular newsprint and periodical sources that communicated fears about the extinction of common animals and concerns about controlling or maintaining bird and game populations in everyday Victorian life. When I turn my attention to my literary case studies, H.G. Wells’s The Time Machine and M.P. Shiel’s The Purple Cloud, I analyze the period’s preoccupation with the human’s future forms, looking at both posthuman evolutionary outcomes and the experience of becoming-nonhuman itself. Significantly, this project recovers underappreciated Victorians and texts, filling important gaps in Victorian periodical studies and animal studies.