Babies can tell who has close relationships based on one clue: Saliva

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  • Ad ID: 6930

  • Added: January 20, 2022

  • Views: 17

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Neuroscientists have identified a specific signal that young children and even babies can use to determine whether two people have a strong relationship and a mutual obligation to help each other: whether those two people kiss, share food, or have other interactions that involve sharing saliva.

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