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Scientists ranked monogamy across mammals and humans stand out

A new study suggests humans belong in an elite “league of monogamy,” ranking closer to beavers and meerkats than to chimpanzees. By comparing full and half siblings across species and human cultures, researchers found that long-term pair bonding is unusually common in our species. Even societies that permit polygamy show far more monogamy than most mammals. This rare evolutionary shift may have played a key role in human social success.

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