The River Nile is one of the longest rivers 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 in the region, providing water to arid lands and supporting the growth of crops. The Nile has two main tributaries: the Blue Nile, which originates in Ethiopia, and the White Nile, which begins in Uganda. These tributaries converge in Sudan before continuing northward to Egypt, where the river empties into the Mediterranean Sea. The Nile has been vital to the development of ancient civilizations, particularly the Ancient Egyptians.