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Ancient Footprints Rewrite North America Arrival
19 Oct
Summary
- Genetic evidence suggests human arrival in the Americas between 14,000 and 20,000 years ago.
- 23,000-year-old footprints at White Sands National Park suggest earlier human presence.
- Ancestral Native American populations likely split around 15,500 years ago.
Recent genetic and archaeological analysis, including 23,000-year-old footprints from New Mexico, is refining our understanding of when humans first migrated to North America. The study suggests humans likely arrived between 14,000 and 20,000 years ago, with an arrival before 15,000 years ago considered probable.
This new evidence challenges the long-held "Clovis First" theory, which proposed an arrival around 13,500 years ago. The discovered footprints indicate a potentially earlier human presence than genetic evidence currently supports. Researchers hypothesize these early populations might represent lineages not yet identified in genetic sampling.
Analysis of ancient DNA reveals ancestral Native American populations likely diverged into northern and southern groups approximately 15,500 years ago, implying their ancestors had already reached the continent prior to this split. However, the exact timing and locations of these divergence events remain subjects of ongoing research.
