New Study Reveals Dolphins ‘Smile’ to Signal Playfulness
Have you ever seen a photo of a dolphin grinning, almost posing for the camera? It turns out that ‘cheesy' expression isn't a coincidence. A recent study published in iScience found that bottlenose dolphins often exhibit open-mouth expressions during playful exchanges. When one dolphin observes another making this “smile,” it often mimics it—a behavior known as rapid facial mimicry.