How come the authors of the original texts that have been continually altered to eventually form the bible knew about Big Bang then?

Hilarious.

Even someone who knew what he was talking about, the astronomer Fred Hoyle, didn't see enough evidence in his day to buy into the concept. Newton, who had even read the bible, (including in ancient Hebrew) didn't catch onto this, as he thought time and space were absolutes. Einstein had problems with probability, which is a necessary variable in Big Bang concept.

The art of theology is fine, but the branch that twists ancient fairy stories to fit in with reality and displays semi literate ancients as visionaries....

When you say visionary, you have to compare them with real ones such as the late Arthur C Clarke. He had his faults but you don't need to twist his ideas to fit in with modern thinking. They are and were what they are and were.

Ancient scriptures are, I'm sure, fascinating for understanding human development from a couple of thousand years ago, but reading anything further into it, you may as well read an Area 51 conspiracy website.....