Humans read primate emotions

A controlled PLOS One study with 212 lay participants found humans can categorize primate facial expressions as positive or negative and spontaneously mimic those expressions, indicating cross‑species emotional resonance. Strength of mimicry tracked perceived closeness and valence, and authors argue this undercuts a strict human/animal emotional divide. — If humans naturally perceive and mirror non‑human primate emotions, that empirically strengthens arguments for expanded moral consideration, improved animal‑welfare practices, and rethinking human–animal communication in conservation and captive‑care policy.