Yet. We're beginning to redesign things. Just you wait. We're going to make bacteria our bitch. Then we'll move onto organ systems, limbs. Besides, they're such obvious problems without any explanation, besides evolution! What was your god smoking when he decided to make the panda? Some good shit, I bet. But is that even an argument? Humans can't do X; therefore aliens/god did it. That, my friend, is a non-sequitor.