Carl Sagan (1934-1996), he was an astronomer, SETI activist, Astrobiologist, and a skeptic. In this particular video he does a good job at eloquently describing history of the universe.
I disagree with a lot of what he says, being an evangelical Christian I disagree with a major part of his worldview. But there are also things we have in common; we are love astronomy, we both imagined life on other planets, we both believe the Big Bang and we both generally accept most of the same science. But there is one major difference which leads to several other differences.
The difference is my belief in God.
Mr. Sagan saw the universe as the result of chance events and mishaps. He saw mankind as a highly advanced animal. He saw religion has superstition of an age past.
I see it hopefully how many Christians see it. I see the big Bang as original creation ex nihilo where God began creating the universe. I see the universe as the work of a cosmic genius.
And as for evolution, I see it as the cosmic creator's method of creation. And what is Man? From a materialist point of view Man is no more then animal. A highly evolved primate which will soon be capable of interplanetary spaceflight. But according to the Christian theistic evolutionary worldview; Man is more then that, somewhere along the way we went from being like them, the animals; brutish, dimwitted, dominated by instinct. Humanity has in this view been given the earth by its creator to live on and to steward. Humans are distinguished from all life-forms since they are made in God's image. Having sense, reason, intellect, morality, etc.
According to Theistic Evolution Humanity is not simply here because the odds were in our favor but because our existence had been planned from the very beginning. From the Big Bang our lives had been mapped out and our existence plotted. And now 14 billion years later here we are, we are only a dim reflection of the glorious resplendent jewel that is God but we are still in God's image, we were created for a purpose, and that purpose is to be a child and servant of God and to serve and love other humans.
On this planet have been given the opportunity to finish our mission; we can either use our gifts, our God-given reason and moral sense to help others, make the world a better place, improve other people's lives, and what not. Or we can squander it all for the sake of the greed, selfishness, and wickedness of the vulgar side of humanity, it is ultimately up to us.