JohnTron - Are you really taking the Adam and Eve story literally?
Humans did not descend from a common ancestor 6,000 years ago. How do you account for the many ancient artifacts much older than the biblical Adam. There is a flute made of bone that dates from 42,000 years ago, an ivory figurine called the Venus of Hohle Fels that is 35,000 years old.
Finding evidence for human activity older than 6,000 years is a regular occurrence for archaeologists.