Traces of these early people appear in the form of artifacts and rock carvings along the terraces of the Nile and in the oases.
To the Egyptians the Nile meant life and the desert meant death, though the desert did provide them protection from invaders.
The dating of events is still a subject of research.
In general, things happen more slowly during Ramadan.
The history of ancient Egypt spans the period from the early prehistoric settlements of the northern Nile valley to the Roman conquest, in 30 BC.
The written form of the Arabic language, in grammar and syntax, has remained substantially unchanged since the 7th century.
In other ways, however, the written language has changed the modern forms of style, word sequence, and phraseology are simpler and more flexible than in classical Arabic and are often directly derivative of English or French.
This is useful for anyone researching Egyptian culture, customs, manners, etiquette, values and wanting to understand the people better.
You may be going to Egypt on business, for a visit or even hosting Egyptian colleagues or clients in your own country.
Between 5500 BC and the 31st century BC, small settlements flourished along the Nile, whose delta empties into the Mediterranean Sea.
The Tasian culture was the next to appear; it existed in Upper Egypt starting about 4500 BC.
Among certain obligations for Muslims are to pray five times a day - at dawn, noon, afternoon, sunset, and evening. Many companies also close on Thursday, making the weekend Thursday and Friday.
The exact time is listed in the local newspaper each day. During the holy month of Ramadan all Muslims must fast from dawn to dusk and are only permitted to work six hours per day.
Continued desiccation forced the early ancestors of the Egyptians to settle around the Nile more permanently and forced them to adopt a more sedentary lifestyle.