Well, here's something interesting. According to this, we humans really can all be traced back to a common first mother... Wonder how that works out? What made her or her offspring human, as compared to others of her species? (Besides God of course) Or were there others, of the same species, and they all died out until only those linking back to her survived? Did her children mate with each other? Or did they take mates from other similar species? How does evolution work anyway? Mind-boggling if you ask me.