This Mariposa County Resource Consservation District video is an extremely interesting historical look at the Sierra Nevada wildfire crisis. The video was created by wildlife biologist and forest ecologist George E. Gruell. George published a landmark book "Fire in Sierra Nevada Forests" in 2001, and this video is based on the insights in his book.

The Sierra Nevada Conservancy focuses on how dense, drought-stressed forests have become prime targets for devastation — not only from Bark Beetle infestations, but from the role of older trees and competition in determining which trees survive.

The California State Association of Counties ' video underlines that our forests are being been transformed from carbon sinks into carbon emitters. And the sheer amount of fuel created by increased tree mortality puts entire forests at risk from mega-wildfires.

This US Forest Service video estimates that over 129 million trees have died in California’s national forests since 2010. Researchers discuss two things contributing to massive loss: fire and water. The availability of water influences the size of trees, the density and the types of trees. Fire controls what’s going on in the understory.

This National Geographic short film explores the devastating impact of mountain pine beetles on North American forests. A researcher examines the insects' genetic code and the trees' resilience to understand how some trees are fighting off these destructive bugs.

This National Geographic video explores how the tiny Mountain Pine Beetle is unleashing vast devastation across North America’s pine forests. Warmer winters and drought-stressed trees mean that these beetles are multiplying out of control.