A race called Khemitian's occupied northern Africa long before Egyptians did. It was know as the land of Osiris. Quite a few experts are beginning to believe that the pyramids, and Sphinx, were built before the Egyptians (as Parker suggest , the water marks,floods, important ancient weather cycles, etc...a great part of very, very ancient Egypt was marsh & lake lands) though built by these Khemitians is not clear. Osiris is one of the main ancient Egyptian God. Some link the word Osiris to the star Sirius, a close neighbor to our solar system. At certain times of the year,with the position of Sirius, the Nile goes through it's yearly flooding, giving renewed life.
Khemitian's state that they had contact with Star People to give them knowledge. This and Egyptians belief in a star gate, and star people draw interest, also the highly developed Sumerian civilization carried the same belief structure. Even MesoAmerican, through Peru, held the same ideas. As a general composite, star people tend to be lighter skinned, white or blond hair, beards and tall...and travel in sky boats (aircraft). This theory, and a great flood (maybe more than one), seems to be a link of the many ancient culture from around the world. Also linked is that Star people, built or gave instructions, as how to build temples, pyramids, farming, writing, etc.
Anything possible, I guess. The stretch of the imagination will be much needed.