Here’s what happened in the impact crater the day it did in the dinos | Ars Technica
https://arstechnica.com/science/2019/09/heres-what-happened-in-the-impact-crater-the-day-it-did-in-the-dinos/The first day of the Cenozoic | PNAS
https://www.pnas.org/content/early/2019/09/04/1909479116What Happened to South America’s Missing Mega-Mammals? - The New York Times
https://www.nytimes.com/2020/10/08/science/mammals-south-america-extinction.html