Cheatgrass, an invasive weed, is choking out native sagebrush in the Great Basin -- and setting the stage for hotter, more catastrophic fires there. Jen Pierce, an expert on ancient fires, and Mike Pellant, of the Great Basin Restoration Initiative, talk about how fires are reshaping landscapes in the American West.
In the video: Post-fire debris flow in Cochiti Canyon, New Mexico
In an interview with Science Friday, fire expert Jen Pierce said "fire-related debris flows are these slurries of rocks and soil and ash and charcoal, which are produced following large stand-replacing fires."
Produced by Christopher Intagliata, Associate Senior Producer