We explore how social information is turned into memory of specific individuals, which is the basis for all our long-term social relationships. This type of memory is termed “social recognition memory” and is known to be dependent on a dedicated network of brain regions, as well as on the brain activity of multiple neuropeptides. In the lab we investigate the neuronal and molecular mechanisms underlying this memory, and especially the role of two hypothalamic neuropeptides, oxytocin and vasopressin.