Something really caught my attention yesterday. I was talking to someone at my university and i see someone walk by and i look for a brief second at their backside and i IMMEDIATELY knew it was one of my friends. How is the brain so capable of recognizing people? Out of the tens of thousands of people at this university, I can recognize people with almost perfect accuracy. This is confusing to me because I heard people and objects are simply recognized by approximate shape diagrams your brain creates when you first see them.