"The authors concluded that the magnificent mammals of the Ice Age vanished with shocking speed when a period of warm, dry climate conditions coincided with the arrival of humans and a tool they struggled to contain: fire." https://www.science.org/doi/10.1126/science.abo3594 https://www.latimes.com/environment/story/2023-08-17/wildfires-once-fueled-extinctions-in-southern-california-scientists-say-it-could-happen-again