New research leveraging ancient DNA analysis is significantly revising our understanding of when humans first populated North America, directly challenging the long-held “Clovis First” theory which posited an arrival around 13,500 years ago. The study, which synthesized existing genetic and archaeological evidence, suggests a much earlier migration, with strong genetic support for humans reaching the continent between 14,000 and 20,000 years ago, making an arrival before 15,000 years ago highly probable. This revised timeline is further complicated by archaeological discoveries like the 23,000-year-old human footprints found at White Sands National Park, which hint at an even earlier human presence than current genetic data definitively supports. Researchers propose that these earlier inhabitants might represent lineages that are either not yet genetically sampled or left no surviving descendants. By comparing ancient DNA from Asia and the Americas, the study indicates that ancestral lineages began to diverge as early as 21,000 years ago, with a significant split of ancestral Native American populations into northern and southern groups occurring around 15,500 years ago, south of the massive ice sheets. This implies that ancestors had already established a presence on the continent prior to this divergence. The study concludes that the peopling of the Americas was a more complex event than previously understood, involving the arrival of small groups into a previously uninhabited continent, though precise timing and geographic locations of these key divergence events remain subjects of ongoing investigation.
Adapted from: Travel News Today on Fox News
