Today I read a short article by Daniel Falk and Francis Collins on Y-chromosome Adam and Mitochondrial Eve (see here). As I understand it we can trace back through the generations of women to the woman from which all women originated. She lives about 150,000 to 200,000 years ago. Likewise, we can trace the Y-chromosome back to the man from which all men originated. It appears he was alive about 50,000 years ago.

This data would suggest that the woman from whom all modern women come and the man from whom all modern men come could not have been a couple. There seems to be a chronological and geographical separation. Does this say anything significant about a literal Adam and a literal Eve?

I have a question that maybe the more scientifically astute can address. Does this data prevent there from being a original human couple from which two strands of humans resulted: one in which we find the modern mother of all women and a different one from which we find the modern father of all men? I find the data confusing. Anyone?