[Quick1]

If evolution is so "clear cut" and "scientific," then why has science been unable to elevate it from a mere theory to a law?

Because it is impossible to scientifically prove, just like it is impossible to prove that it is actually gravity keeping us on earth.

[wagglebee]

So why does science regard gravity as a "law" rather than a theory? In truth evolution should be considered a hypothesis rather than a theory. A theory is "an explanation of a set of related observations or events based upon proven hypotheses and verified multiple times by detached groups of researchers." I am unaware of any of Darwin's hypotheses being proven.
http://wilstar.com/theories.htm