Yawn contagion (YC) is, compared to spontaneous yawning, an evolutionary recent
phenomenon probably linked to behavioral synchronization in highly social species that is …

Although studies on primate communication have mainly focused on single communication
systems (gestural, facial or vocal), there is an increasing interest in a more integrative …

Developmental precursors of the prelinguistic transition from gestures to word use can be
found in the early pragmatic usage of auditory and visual signals across contexts. This study …

In nonhuman animals, the phenomenon of rapid facial mimicry (RFM)—the automatic,
involuntary, and rapid (< 1 s) replication of others' facial expressions—has been mainly …

Yawning is a complex behaviour linked to several physiological (eg drowsiness, arousal,
thermoregulation) and social phenomena (eg yawn contagion). Being yawning an …

This article aims to analyze the biological and communicative function of facial expressions
and their relation to emotions in mammals. Facial expressions and their causes constitute an …

Simple Summary In vertebrates, each of the two hemispheres of the brain controls the
opposite side of the body. Consequently, lateralized actions in animals may reflect that one …

Beluga whales are considered unique among odontocetes in their ability to visibly alter the
appearance of their head by changing the shape of the melon, but only anecdotal …

Language, according to classical philosophy, is considered as the expression of thought
specific to human. This function is still considered qualitatively different from the rest of …