For the record, I worked in Dr. Teri Marcow's evolutionary biology lab at the University of Arizona and am a microbiology major.
OK, microevolution is more than just "adapting to your environment." It is observable natural selection. It is when the least adapted members of a species or population die out, leaving only the best adapted.
And as for evolution not explaining creation; it's not supposed to. It only explains the constant changes in living things over the aeons. But there are sevearl theories about how life arose from the scientific standpoint, most of them involving how nucleaic acids' self-replicating/enzyme-like activity could have, through sheer dumb luck, crossed the line from really, really complicated chemical to living thing. Self-replicating chemicals can be created in laboratories without biological precursers.
Now, I may as well mention that I am not an athiest. I just think that it's impossible for a reasonably educated person to believe that God intends us to view the book of Genisis as a factual account. Just because science has all but proven evolution to be true does not mean that the message of the Bible is wrong. Only through brainwashing can "the inteligent design hypothesis" and other forms of creationsism spread. Just cause God didn't make the Earth in the same way the Bible says, doesn't mean He's not up there and wants us to do our best to be good people.