Chickens are the closest living relative to the T-Rex. That’s right, the mighty fearsome T-Rex has evolved into a chicken. Back then all other dinosaurs thought those tiny arms were ridiculous, but look at them now. Well… They still are. For those who already have a 3D printer at home, here’s a blueprint so you can make a set of arms yourself, and you won’t have to to order them online. However, if you don’t have a 3D printer and would like to buy these, you can get them on Etsy or on Amazon.