Add Yahoo as a preferred source to see more of our stories on Google. Don’t worry, animal lovers. All the birds, gators, alpacas and other critters at The Shell Factory have found new forever homes.

A shell is a hard, rigid outer layer, which has evolved in a very wide variety of different animals, including mollusks, sea urchins, crustaceans, turtles and tortoises, armadillos, etc. Scientific ...