Sometimes, I feel overwhelmed by the information and science that I read, and often wonder how to evaluate the ‘science’. This video challenges the theory that most of desertification is because of cattle and large mammals. This ecologist claims, just as once we were certain that the world was flat, we were wrong then and we are wrong about the causes of desertification. Apparently, the natural movement of herds prevented over grazing of plants and trampling promotes biological decay necessary for ecological succession and to prevent desertification. He suggests doing the unthinkable, to use livestock bunched and moving to mimic nature to address climate change and desertification.