Ancient Fires Drove Sabertooth Cats and Other Large Mammals Extinct, Study Suggests Fossils from La Brea Tar Pits in Southern California suggest that sabertooth cats and other large North American mammals disappeared as a result of wildfires spurred by human activity.
Using Fossils to Bring the LA River Back to Life The field of conservation paleobiology is helping scientists to bring living things back to parts of the Los Angeles River.