• September 7, 2023
• https://guymcpherson.com/edge-of-extinction-oh-no-mr-bill/

The video embedded below, along with the draft script, can be viewed on the Nature Bats Last Substack account. Comments are enabled on Substack with a paid subscription.
https://www.youtube.com/embed/UnRDIzAoh44?enablejsapi=1&autoplay=0&cc_load_policy=0&cc_lang_pref=&iv_load_policy=1&loop=0&modestbranding=0&rel=1&fs=1&playsinline=0&autohide=2&theme=dark&color=white&controls=1&

Latest Peer-Reviewed Journal Article:

Guy R. McPherson, Beril Kallfelz-Sirmacek, James Massa, William Kallfelz, and Ricardo Vinuesa, June 2023, Results in Engineering: “Environmental thresholds for mass-extinction events.”