text: To begin, the brain tries to recognize faces, and it is really good at it. It says, "Yep, that's a face!" and that's because humans are social creatures. We need to recognize others that will be able to support us and stay together, because in ancient times, that, along with our ability to think and reason, was what we had going for us. As one source that I forget the name of stated, "Pretty much the only thing we can outsprint by bodylengths per second is vegetables." We could make tools and weapons to support ourselves, but to be effective, we had to team up. And that is why we see a "man in the moon". We see the face by craters. This is just the same thing, our brains being awesome at seeing faces, but not at recognizing the lack of a body to go with them.