Thank you for the question, “What did the Bible fail to mention?”
The Bible does not seek to answer all of life’s question or of our universe. The Bible focuses on the creation of humans in the image and likeness of God and the restoration to it. Thus it is not that the Bible fail to mention everything, it was not pertinent to the creation account.
As an example, here is one thing that the Bible does not reveal is whether there are other life forms in the Universe. The Scriptures are silent. Personally, I think/believe there are other life forms in the Universe whereby all creations praises and give honor and thanks to the Creator God.
For more perspectives: