Babies can tell who has close relationships based on one clue: Saliva: Sharing food and kissing are among the signals babies use to interpret their social world
Learning to navigate social relationships is a skill that is critical for surviving in human societies. For babies and young children, that means learning who they can count on to take care of them. MIT neuroscientists have now identified a specific signal that young children and even babies use to determine whether two people have […]