The Big Questions Science Still Can’t Fully Answer

Animals make sounds of distress, show fear, seek comfort, and form bonds, but emotional tears appear to be uniquely human. Basal tears keep the eyes moist, reflex tears help wash away irritants, and emotional tears seem to do something more social. They can signal pain, grief, relief, joy, apology, exhaustion, or the need for care without a single sentence. Researchers have suggested that visible tears may encourage support and reduce aggression by showing vulnerability.