Panthera Leo Atrox is the American lion which populated North America during the
Ice Age. Though extinct for roughly 10,000 years, much is known about his appearance
due to the many whole-animal fossils almost perfectly preserved in the
La Brea tar pits in Los Angeles. He was descended from the cave lion, but looked
more like the modern lion, although much larger. To the right is a photo of Paleolithic
cave art from Chauvet showing a herd of lionesses on the hunt.