This is truly magnificent! Evolution is so beautifully displayed in these instances! Thanks to Darwin and modern genetics, we now know how random mutation and natural selection, plus a really really long time, can produce such amazing feats of engineering genius. I don't mean "engineering genius" to imply "intelligence." No, that would violate naturalistic materialism. The reason being, science cannot operate on anything but that. Therefore, I can conveniently conceive of any biological design, even the most mind-boggling complexity, and perceive an explanation as long as it is within the realm of my materialistic worldview. Praise science!