Ancient human species still in our genes

All of us in Europe carry genes from this human species, writes Richard Collins

“And Cain went out from the presence of the Lord and dwelt in the land of Nod on the East of Eden. And Cain knew his wife and she conceived and bare Enoch, and he built a city.”

BUT who was Cain’s wife? Unless Adam had a daughter that Cain took with him, the only females available would have been Neanderthals.