Sixty-six million years ago, an asteroid struck near the Yucatan and altered the course of life. Follow the evidence linking Chicxulub to the K-Pg extinction, the rapid collapse of a vast crater, the darkness and cooling that followed, and the ocean-drilling cores that record destruction and recovery. Inside this episode: - The iridium boundary and the search for an impact crater - How the Chicxulub peak ring formed - What happened during the first day - Darkness, cooling, food-web collapse, and extinction - Drilling the buried crater and tracing recovery Sources include International Ocean Discovery Program Expedition 364 records, peer-reviewed impact and climate studies, and geological syntheses. This episode is a researched narrative summary. Historical records may be incomplete, translated differently, or interpreted differently by scholars. ...