The ice age is not mentioned in the Bible. Neither are dinosaurs, mass extinction events, saber-toothed tigers, Chinese people, the existence of microbes, the content of the atmosphere, the existence of planets, or any of millions of things that are not relevant to the story of the Bible. The Bible has never been a science book, and it certainly does not give irrelevant information (irrelevant to the story of God’s relationship with people, that is), that scientists have discovered. If I wrote a book about baseball, I would not supply information about tennis, as it would not be relevant to baseball. The Bible is the story of God and his relationship with human beings. It is not about geology, paleontology or evolution.