[Iron Matron]

I know your literal interpretation of the Bible will not allow for such a concept, but until about 50,000 years ago, there were three separate human species on Earth

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It may though. I'm not speaking evolution as "tadpole to human", the bible does not support that. But evolution within the species is entirely possible, perhaps bibicle.

Adam and Eve were "different" before their expulsion from the Garden. Afterward, Adam and Eve dressed in "animal skins". After the murder of Abel, Cain was sent to the land of "Nod" to live with the people there. This is the earliest human record, maybe it means something?

[Modernman]

After the murder of Abel, Cain was sent to the land of "Nod" to live with the people there. This is the earliest human record, maybe it means something?

The Bible is the earliest recording of events by humans? Most certainly not. IIRC, writing developed about 6,000 years ago. The Bible is not that old.