@brandonsays,
Of coarse science is 'tentative.' That's the reason it's the most reliable source for human knowledge. It's the only knowledge base that continues to improve with new knowledge and 'findings.' DNA and radioactive dating are recent human discoveries from which we have learned more about ancestry and learning the age of objects and materials heretofore unknown in human knowledge. Science continues to improve our knowledge of our environment that can't be explained in any religious document.
The origin of homo sapiens was in Africa. The writers of religious documents didn't know about atoms, mathematics, anthropology, DNA or radioactive dating methods.
Human knowledge continues to reveal more about our environment. Religious documents are static with many errors, omissions, and contradictions.
I prefer science over any religious dogma.