Via I fucking love science / FB:

Pareidolia is a phenomenon that allows us to "see" faces and other objects in completely unrelated objects and settings. Carl Sagan theorized that this provided an evolutionary advantage, as it allows humans to better recognize each other, even under poor visual circumstances.

The important thing to remember is that even though these images may seem significant and life-changing, they aren’t. It's all just a really fun figment of your imagination.