Wrong questions Marty.

For one, the Bible need not concern itself with "how old in the world"? Second, the Bible was written by early man inspired by their own quest for understanding their world and knew nothing of science. I think literal believers in the Bible believe it is all the Word of God, speaking through prophets and messengers, and speaking to matters of religion and community. I'm not surprised the age of the earth or the universe goes unmentioned.

As I understand it, (an I happily stand corrected if wrong), Genesis does not mention anything other than the process and that creation took 7 days...and from there various approaches and adherents calculated\extrapolated from there. Scholars do not agree here and that the earth is supposed to 10000 years old or so is not accepted by all

WRT dinosaurs going unmentioned...they were not around when the Bible was written and of no consequence

But there is definite fossil evidence of their exiostence, and science has determined a lot about our universe, its age based on certain assumptions about thre speed and behaviour of light, and the age of our own galaxy, solar system, and how it was formed. All is based on observation and the laws of physics as learned over the years

To me, I have no issue with all these things not mentioned in the Bible, or if science clarifies something that was assumed based on writings of men years ago who knew little of science.

If writing ever becomes work I think I'm going to have to stop