Genesis is the book of origins, the book of beginnings.
We have the beginning of the material universe, the beginning of the human race, the beginning of human sin, the beginning of divine redemption, the beginning of the nations of the earth, the beginning of the Hebrew nation, the beginning of the life of faith and consecration. I believe Genesis was written by Moses. Most conservative scholars agree. The purpose of Genesis is not to give a detailed history of the human race, or the history of science. It's primary purpose is to tell us about Abraham and certain of his descendants.