Nil Nehri, or the Nile River, is the longest river in the world, stretching about 6,650 kilometers (4,130 miles). It flows through northeastern Africa, primarily through countries like Egypt and Sudan. The river is crucial for agriculture and water supply in these regions, supporting millions of people. The Nile has two main tributaries: the Blue Nile and the White Nile. The river is famous for its historical significance, as it was vital to the development of ancient Egyptian civilization. The annual flooding of the Nile provided fertile soil, enabling agriculture to thrive along its banks.