Simple: God didn't. Based on the theories of evolution, The Einstein Factor, plus when you actually sit down and read through the New & Old versions of Genises in the "Holy" Bible, you will notice many scientific contradictions. Not just Biblical.
During University I majored in Religious Philosophies. I've studied all kinds of religions from Christianity, Buddhism, Satanism, Thelema, Hindu and loads more; and I honestly have to say, none of the above listed religious philosophical texts have as more contradictions than those of the Christian religion. Christianity is a joke.
Many have attemped to validate the Christian theories; but have unearthed nothing but rube fooling, besmirching and pseudo-intellectual brain-farts from people deemed 'loyal' to another. Contradiction in that: In the Bible it states "One cannot serve God & Man" - thus; the very beginning and the end of it is full of more contradictions than any other that I have witnessed.
Religion itself provides a cover for the masses; it's something for the sheep of society to use as a scapegoat - to use as an excuse to not accept the consequences and responsibilities of one's own behaviour, decisions, and actions. 'God' never existed, and never will. But even I remain open-minded enough to understand that we have yet to discover the Universe, so anything is still possible.
However in the meantime I will look more at Science for the answer as to whether "God" exists or not. So far, Intel tells me: He does not, and never did, exist.
My own sentiments entirely but I am interested to see the lengths to which some people will go to justify their absurd beliefs.
On another thread I found that one person lied about what was in the Bible. He had made a small addition to suit his purpose. I checked the King James version, the Vulgate and the original Greek without finding what I had been told was there. When I asked for the source containing the addition, I was not given one.
I think evangelism relies on people's ignorance for whatever success it may have