"But if they didn't come from Adam and Eve then it is possible 1/2 of the population or more of the world didn't come from Adam and Eve."
Certainly. Literal Genesis is tough to tackle because no one who experienced is living. But even so, the bible also acknowledges other people or tribes existed. It could have even been evolved apes into Neanderthal type beings. But keep in mind that Adam rising from the dust is not too farfetched in that the carbon we have in our body has always been a part of the earth since the beginning. And into dust we return. This means a plant living 10 million years ago could have recycled 10 million times into the corn you bought at the grocery store, which you ate, added nutrition to an unborn child, who is born, retaining the same carbon material.
Oh?
Where?