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New research shows great apes have an extraordinary social memory, recognizing former group members even after more than 25 years. This finding, which indicates a significant cognitive similarity between great apes and humans, emphasizes the depth and duration of social ties in our animal relatives. The study found the longest-lasting non-human social memories ever recorded. Photo: Johns Hopkins University

New research shows great apes have an extraordinary social memory, recognizing former group members even after more than 25 years. This finding, which indicates a significant cognitive similarity between great apes and humans, emphasizes the depth and duration of social ties in our animal relatives. The study found the longest-lasting non-human social memories ever recorded. Photo: Johns Hopkins University

New research shows great apes have an extraordinary social memory, recognizing former group members even after more than 25 years. This finding, which indicates a significant cognitive similarity between great apes and humans, emphasizes the depth and duration of social ties in our animal relatives. The study found the longest-lasting non-human social memories ever recorded. Photo: Johns Hopkins University

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