First of all, you're probably trying to refer to the midochondrial Eve (though I'm not sure, since it seems as you believe that science is black magic...), who is not our common ancestor, she is the most-common matrilineal ancestor. Secondly, instead of 6,500 years ago, try ~150,000. I can easily go farther into this explaining the observation of mitochondrial DNA mutation trends and and how Eve had the largest unbroken line of female descendants despite there being a population of humans back then (their lines have been broken through generations producing only sons or no offspring at all), or that even the Y-chromosomal Adam lived about 75,000 years ago, but I have a feeling you're going to point to the Bible and begin thumping it rapidly.
omnia mea mecum porto