I was pleased and honored when I was asked to be a guest author and write an article for http://www.ancient-origins.net due to my historical fiction novel, Khamsin, the Devil Wind of The Nile.
Well, everything my research about pre-pharaonic times was in my head had obviously been already written by someone else, mostly noted archaeologists and other renown Egyptologists. What could I possibly add?
Then it hit me: Something about The Nile. The topic is especially close to me (as it must be to millions of those living along this great river), as Book 5 of my Legends of the Winged Scarab series - The Nile Conspiracy - deals with the great concern over water distribution to Egypt and the Sudan from the Blue Nile springing from the Ethiopian Highlands.
From their extensive files, AO had added some great imagery
such as this one to my article.)
can read the article itself here.
I also urge you to take a look at the other informative material published by Ancient Origins.