Edge of Extinction: Why Rangers?

The video embedded below was recorded in late August 2021 in Yellowstone National Park. I am no longer in the nation’s first national park. We will premiere the video at 5:00 p.m. Eastern time on 24 March 2022.

Latest Peer-Reviewed Journal Article:

McPherson, Guy R., Beril Sirmack, and Ricardo Vinuesa. March 2022. Environmental thresholds for mass-extinction events. Results in Engineering (2022), doi: https://doi.org/10.1016/j.rineng.2022.100342.