- National Historic Landmark ... East Lehner Road, Hereford, Arizona - The site is significant because it's the first Clovis kill site where butchering tools were found alongside the remains of prehistoric bison, mammoth, and smaller animals ... a fire hearth was also found and dated, placing the Clovis people in North America between 8000-9000 BCE - Woolly mammoths were about the size of a modern African elephant, standing over 10 feet tall at the shoulder and weighing as much as 13,200 pounds - Known for their large size, fur, and imposing tusks - Woolly mammoths roamed the cold tundra of Europe, Asia, and North America from about 300,000 years ago up until about 10,000 years ago - The last known group of woolly mammoths survived until about 1650 BCE - One widely-accepted theory is that fire and the development of tools, such as spears, hooks, and nets, helped humans become ace hunters, driving woolly mammoths into extinction Map Wikipedia Information