The brain network associated with social interaction observation involves large part of the frontal cortex and parietal areas in marmosets.

Social-interaction impairment in germ-free mice is associated with a markedly altered transcriptional response to social novelty in the amygdala, as characterised by replacement of upregulation of common stimulus-induced pathways with upregulation of the splicing machinery.

The subjective time of social interactions reflects one's autistic-like tendency and is critically mediated by oxytocin, indicating that time perception is ingrained with personality traits, which likely have neuroendocrine origins as per previous research.

Tracking individual mice within a group makes it possible to quantify and model social behavior, and reveals that the behavior of the group goes beyond pairwise interactions, and is shaped by complex interactions between multiple individuals.

Analysis and modeling of group behavior of adult zebrafish shows that a specialized social interaction mechanism increases foraging efficiency and equality within groups, under a variety of environmental conditions.

Organizational resilience allows ant colonies to retain high interaction rates in the face of decreased density by altering their spatial and social dynamics.

Experiments and modeling suggest that a mechanism involving positive and negative feedback can explain the relationship between the neural activity of socially interacting bats.

Using novel approach to study real-time social interactions shows that mutual action visibility facilitates static and dynamic coordination in both species, but whereas humans employ dynamic turn-taking to equalize rewards, macaques, after training with a human, compete between themselves.

Snout-to-snout contact modulates the response of rat auditory cortex to calls from other animals, indicating that the multisensory nature of social interaction is directly represented in the rat brain.

A new way of measuring sociality in human and animal contact networks reveals the link between social behavior, population density, and disease transmission.