Diverse fossils From La Brea Tar Pits tell story of how horses, saber-toothed cats, dire wolves, and other megafauna that once roamed the Los Angeles Basin disappeared.
Rapid drying combined with human-made fires changed Southern California forever, killing off ancient bison, dire wolves and five other megafauna species there.
At Los Angeles’ La Brea Tar Pits, scientists found they could watch large mammals disappear from the fossil record—and could trace the ecosystem through the catastrophe