It is my husband's contention (jury is still out for me) that one is the story of man--like neandethal, and the other is the creation of God's people--Adam--cro-magnon.
It is true that cro-magnun sprang abruptly into the picture around ancient Ur (where Abraham's father was from) and immediately started learning at a rocket pace compared to other species of humanoids. (ref :Encyclopedia Britannica)

__________________