> I've been trying to draw a timeline for ancient Egypt. I am trying to
> determine the earliest known date on that timeline. I have found
> answers ranging from 65 B.C to 90 B.C. I was hoping to hear from
> experts and to get an idea of reliable sources I can look at.
You can get an overview of the predynastic period of Egypt (prior to 3100
BC) in Wikipedia:
http://en.wikipedia.org/wiki/Predynastic_Egypt