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The Nile River
Although the Nile seems like an ancient river - after all, it was there long before one of the earliest civilizations began to develop on its banks - it is really a very young river and has gone through many changes over the recent (in geologic terms) past. The Nile consists of a series of steeper and flatter segments, and this is thought to indicate that several independent drainage systems existed in the region now drained by the Nile. There is much that we do not know about how the Nile formed, and much work remains for future scientists to discover. What follows is an outline of what we think we know now.