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5,500-year-old human skeleton discovered in Colombia holds the oldest evidence yet that syphilis came from the Americas An ancient DNA analysis of a 5,500-year-old human skeleton reveals that an ancestor of the bacterium that causes syphilis was present in the Americas at least 3,000 years earlier than previously thoug... https://www.livescience.com/archaeology/5-500-year-old-human-skeleton-discovered-in-colombia-holds-the-oldest-evidence-yet-that-syphilis-came-from-the-americas