This comes up often: Evolution can't explain the eye.

Seriously? Trained biologists aren't able to figure this one out? Seems pretty logical to me.

There are, right now, animals (worms and such) which have photo-sensitive nerve clusters. This is where the eye starts. Those who have these clusters protected by a thin layer of cells have an advantage. The covering grows more transparent, and therefore may grow thicker--the lens starts. With the added thickness of the lens, the nerve cluster--the newly-forming retina--can recede for more protection. Musculature in the face grows around the lens.... From there it's all just a matter of refinement.

Is it amazing? Yes.

But it's hardly "unexplainable" in evolutionary terms.