The Clovis culture is a prehistoric Paleo-Indian culture, named after distinct stone tools found at sites near Clovis, New Mexico, in the 1920s and 1930s. The Clovis culture appears around 11,500–11,000 uncal RCYBP (uncalibrated radiocarbon years before present), at the end of the last glacial period, and is characterized by the manufacture of "Clovis points" and distinctive bone and ivory tools. Archaeologists' most precise determinations at present suggest that this radiocarbon age is equal to roughly 13,200 to 12,900 calendar years ago. Clovis people are considered to be the ancestors of most of the indigenous cultures of the Americas.