The Nile River can be found in northeastern Africa, flowing through several countries, including Uganda, Sudan, and Egypt. It is traditionally known as the longest river in the world, spanning approximately 6,650 kilometers (4,130 miles). The Nile consists of two main tributaries: the White Nile and the Blue Nile. It has played a crucial role in the development of ancient Egyptian civilization, providing water, fertile land for agriculture, and a means of transportation. The river's annual flooding deposited nutrient-rich silt, crucial for sustaining the agriculture that supported the population for millennia.