Ice Age Weapons Reveal Evidence of Paleo-American Hunting Practices.

Archaeologists have discovered 13,000-year-old blood residue from large mammals, most likely mammoths and mastodons, embedded in the sharpened stones that ancient Clovis people used for hunting. The 120 stones used in the study all came from North or South Carolina. The findings would shed new light on what might have caused the extinction of giant Ice Age herbivores.