Why Do People Keep Seeing Stuff On Mars That Isn't There?

There have been quite a few news stories lately about sightings of faces and human-like figures in the pictures sent back by rovers on the planet Mars. This phenomena is nothing new. It is part of our brains basic programming and is known as Pareidolia. In this video by SciShow, Hank Green tells us all about this strange tendency of the mind to find faces and familiar images in random images.