The theory of evolution - and here I refer to it in terms of an established
scientific theory, not in the sense of "Hey, I just thought of something that might work!" - is a complex, elegant system by which all living things on the planet emerged over billions of years, through a process called natural selection. Although many religious groups have sought to misinform people on evolution and how it works, it has been an established and universally accepted theory in the scientific community for well over a century. Evolution is happening around us every day.
On a personal note, I happen to be a Christian. I see no reason why my faith should preclude rational thought, and I also see no contradiction between my faith in God and my acceptance of evolution. If some of my fellow Christians insist on viewing an ancient creation poem as a scientific text, they can have at it. I believe that God's methods are more creative and complex than that.
The site's title and the quote on the layout come, of course, from Charles Darwin.