> dna genealogy can trace human origins to a central "cradle of life"?
DNA shows that all living things are related. We can even exchange DNA and still retain the same function. This is very strong evidence that life arose on earth once and evolved to all currently and past living species. The fossil record shows a continuously progression from simple to complex species, we can trace our ancestors back to 500 million years ego in Pikaia gracilens*. So the answer is yes.
> where does it say global? if anything it was regional but large enough to cover a huge area.
All the creationist and literal bible believers.
> the earth and sun were not created in a big bang that arose out of nothing?
No. The big bang theory is that space and time was compressed in plank space and plank time. So space (matter and energy) and time was already there, just compressed. Then came the "bang" with was the inflation of space and time. Theory of relativity shows that space and time are not separated and quantum theory shows that at very small space gravity and all the other forces should be one. Supersymmetry and quantum gravitation. Still work in progress.
> actually it says god made two people from the minerals found on earth (dirt) which molecularly is 100% true, and the bible doesnt say all mankind evolved from those two, maybe you should read it again without the atheistic blinders on. .
Dirt, mud, ashes, earth, dust, whatever. We all star dust. I do remember that Adam and Eve were the first humans.