What about biologists? I would think they've studied more than most. And there's near-universal consent on the subject of common ancestry.
It was caused when Noah's grandsons found that they had NO other Humans (descendants of Adam) to marry. Like Cain, they married and produced children with the descendants of the sons of God (prehistoric women) whose origin was in Water on the 5th Day. The genetics of Humanity was altered pointing our true origins to prehistoric people instead of Adam, the first and only common ancestor of Humans, who are the children of God.
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