News · 14 February 2026
Why Humans Are the Only Animals That Cry From Pure Emotion
Humans are uniquely wired to shed emotional tears. When emotions overwhelm the brain's limbic system — whether from grief or joy — the body activates the parasympathetic nervous system to restore calm, releasing oxytocin and endorphins in the process. Scientists at The Conversation describe this as "emotional homeostasis," the brain's effort to return to balance after intense feeling. Happy tears are no paradox — they are the brain processing complexity it cannot express in words. No other species produces tears triggered by feelings alone.
Reported by The Conversation · How we write briefs