A study presented by researchers at Purdue University examines events following the asteroid impact 66 million years ago, associated with the mass extinction that ended the age of non-avian dinosaurs. The research addresses a long-running question about how quickly the post-impact environment became lethal for most animals. According to the report, widespread fires ignite soon after the impact and burn at a scale that incinerates most animals within hours. The study then describes a subsequent shift to a cooler, harsher period, in which a global winter develops and persists long enough to reduce the prospects for any survivors. The findings aim to provide a unified timeline that connects immediate aftermath—dominated by fire—to the longer-term climatic collapse that follows. The outlets summarizing the study characterize the work as settling aspects of the debate by proposing a rapid sequence: early fire-driven destruction followed by later global cooling. The reporting does not describe dissenting interpretations, methods, or specific data limitations in detail.