Picture this: You’re at a bar and someone clearly intoxicated starts telling your friend their grand theory about how the Titan submersible implosion was faked. Your friend locks eyes with you, clearly wanting to leave this dreadful conversation. She makes eyes to the door. Following someone’s gaze may seem like a simple act, but it has profound implications for the evolution of intelligence. And humans are far from the only animals that do it.
A recent study of bottlenose dolphins in the journal Heliyon adds to previous research identifying the ability to follow the gazes of members of other species — a visual and cognitive trick that may relate to the development of empathy — across a wide range of mammals, not just humans and our fellow primates. What’s even more interesting is to trace this ability through not just the mammal family but beyond, to reptiles and birds — and perhaps back as far as the Jurassic period.
