Yes, I'm familiar with the watchmaker and the "half an eye" argument You say that design implies designer, yet the "design" might actually only be an illusion. Evolution of species gives an impression of design, yet it is based on natural selection, an unconscious and automatic process (if there is a watchmaker behind this, he must be a blind one). How are random mutations a design? If the design was true, it wouldn't be a very good one either. Why do we breathe and eat through the same hole if it makes choking to death possible? Why do our "fun parts" are so close to the "nasty parts"? Why do we have all those useless organs like the appendix, wisdom teeth, tailbone, etc.? When it comes to evolution the watchmaker is not necessary because the watches can make themselves. "The other argument is that you couldn't possibly have something so complex as an eye without a Creator intervening." - people who make this argument point out that you cannot have just half an eye, because it would be useless. All the parts need to be there, arranged in precise order. It is true, you cannot have half an eye, but you can have an eye half as good at seeing. In the animal kingdom you get all sorts of eyes, from simple ones - patches of cells that react to light, to complex ones, like our own. The evolution of the eye was a progression, a development and not a quantum leap. Also, the proteins that make the eye had some different function in the beginning. Only when "seeing" turned out to be an advantage they were modified to be better at it. You said it - environmental circumstance. The chances are that the environmental circumstances in the Andromeda Galaxy are quite different than on Earth, thus producing (hopefully) quite different forms of life. Obviously the possibilities are not endless, most of the mutations have quite fatal consequences. There are also some options that are incredibly usefull - like eyes or ears - and were developed independently quite a few times in the history of evolution. So I guess we could probably expect some eyes and ears from the Andromedans It would be a disappointment, though, if they too were based on DNA. The biologists would be inconsolable.