Pareidolia: Seeing Faces in Unusual Places

"As soon as we're born, we start to look for faces," says Lee, explaining that it's a product of millions of years of evolution. "One reason is that our ancestors needed to avoid predators or find prey, all of which have faces. And a second reason is that humans are very social animals. When we interact with each other, we need to know if the other person is a friend or foe."