I have a question about it If evolution is changing for the better and growing and gaining new abilities that help our survival then why cant we grow arms and legs back? If we came from the chain of animals or how ever it goes we would have gone though the yabbie, lobster and crab stage and as you know they can all grow back there limbs if they loose them. So why did evolution choose to leave out that ability? It seems like a very good ability to have to help stay alive. So why cant we if the evolution theory is correct?