Waco Mammoth National Monument was established in 2015 near Waco, Texas. The museum and site preserves the fossils of 24 Columbian mammoths and other mammals. The nursery of mother and young Columbian mammoths was probably caught in a flash flood about 67,000 years ago. The site was discovered in 1978 by two men looking for arrowheads. Children can learn more, including the differences between Columbian mammoths and woolly mammoths, at: http://www.nps.gov/waco/index.htm.