Long before a baby learns to say mama, ask for food, or point toward something interesting, they already possess a remarkably effective way of communicating. A tiny face brightens, the corners of the mouth rise, the eyes seem to come alive—and suddenly the adult looking down is smiling too. No vocabulary has been exchanged, yet …
Laughter is one of those human behaviours that feels so natural that we rarely stop to wonder why it exists. A joke lands at exactly the right moment, a friend makes an unexpected remark, or someone begins laughing so uncontrollably that everyone else joins in without even knowing what happened. Within seconds, breathing changes, facial …