Did you know you have useless body parts? Check out The Heart In Numbers: http://lifenogg.in/1Q3LTjN Follow Us! https://twitter.com/LifeNoggin https://facebook.com/LifeNoggin Click here to see more videos: https://www.youtube.com/user/lifenoggin Life Noggin is a weekly animated educational series. Whether it's science, pop culture, history or art, we explore it all and have a ton of fun doing it. Life Noggin Team: Animation by Steven Lawson Director/Voice: http://lifenogg.in/patgraziosi Executive Producer: http://lifenogg.in/IanDokie Director of Marketing: http://lifenogg.in/JaredOban Writer: http://lifenogg.in/KayleeYuhas Sources: http://www.livescience.com/11317-top-10-useless-limbs-vestigial-organs.html http://io9.gizmodo.com/5829687/10-vestigial-traits-you-didnt-know-you-had http://evolution.about.com/od/evidence/ss/4-Vestigial-Structures-in-Humans.htm#step3