It's all about fundamentals.

Simply put, all matter in the universe works according to a set of rules. These rules are simple but they have no awareness of time. For this reason, the second law of thermodynamics opposes evolution.

I know this will not make sense to you at first glance, so let me explain.

There are rules that allow for the binding of elements to create molecules. These same rules enable the binding of molecules to form other molecules. These rules are all based on proximity forces—that is— forces that have a distance-dependency in the physical world. For this reason, molecules don't have an effect on other molecules that are a sufficient distance away.

This limitation—physical distance—is the reason there are two separate and distinct disciplines called chemistry and biology. This limitation is also the reason (really, one of many reasons) that molecules don't have the ability to form complex things without external intelligence; Because they don't know what's going on somewhere else. For this reason, they cannot say, "Oh hey, we are going to form an optic nerve here so we're gonna need an eye over there and then a brain over here, and then we're going to have to connect them all together". There is no coordination (if you will) between molecules that are outside the proximity stated by the existing rules. These rules only allow reactions within a certain proximity and then, only according to existing rules.