Produced by: Manoj Kumar
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Scientists uncovered a hidden chapter in human evolution—modern humans descended from two ancestral populations, not one, making our history far more complex than previously thought.
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Around 1.5 million years ago, two human ancestor groups—Group A and Group B—split, possibly due to migration. These groups evolved separately for over a million years.
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Roughly 300,000 years ago, Groups A and B came back together, interbred, and eventually gave rise to Homo sapiens, reshaping our understanding of human evolution.
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Group A contributed 80% of modern human DNA, while Group B made up 20%, showing a previously unknown mix of early human genetics.
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Group A may have been the ancestor of Neanderthals and Denisovans, suggesting an even deeper connection between modern humans and other ancient hominin species.
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Scientists aren’t sure where these groups existed—both could have remained in Africa, or one may have migrated to Eurasia before their eventual reunion.
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The groups may have been linked to Homo erectus or Homo heidelbergensis, but the exact identity of these ancestral populations remains unknown.
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This discovery challenges the long-held belief that Homo sapiens descended from one single lineage, proving that human evolution was a far more intricate process.
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The new genetic method used in this study could revolutionize how scientists study the evolution of other species, from bats and dolphins to chimps and gorillas.
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