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.
Ancient DNA Reveals History of Hunter-Gatherers in Europe Looking at DNA gleaned from ancient remains, researchers identified at least eight previously unknown populations of early Europeans.