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Ancient DNA questions human arrival in North America
Research examining ancient DNA suggests humans first arrived in North America between 14,000 and 20,000 years ago, earlier than the traditional "Clovis First" timeline of about 13,500 years ago. Evidence from archaeological finds, such as 23,000-year-old footprints, supports an earlier migration, with ancestral Native American populations likely splitting into northern and southern groups around 15,500 years ago.
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