Respuesta :

danielhero77
This claim came from some researchers studying how chicken eggshells form. Eggshell is mostly made from calcium carbonate (CaCO₃).
cocobear121
So in a nutshell (or an eggshell, if you like), two birds that weren't really chickens created a chicken egg, and hence, we have an answer: The egg came first, and then it hatched a chicken.