Science Update: Mass Extinction Events Follow a 27-Million-Year Cycle
https://youtu.be/-EJcIgxDS1A SciTechDaily article Peer-reviewed article, as pdf Figure from peer-reviewed article: The end-Guadalupian (259.8 Ma) biodiversity crisis: the sixth major mass extinction? Sixth Mass Extinction? Published Recently: McPherson, Guy R. 2020. Academic Pursuits. Woodthrush…