Dogs can differentiate between human faces

While it seems pretty evident, this is actually a remarkable ability. Only a few animals can do this. A study compared the reactions in dog brains when they look at everyday objects vs. human faces vs. their human’s face, and it was found that their brains lit up with faces. Located in the temporal cortex, which is the same part that lights us for us, this proves that dogs know us by sight as well.

This explains why your dog goes nuts when you FaceTime them too. They know your features, bud.