The important African river that flows through countries such as Zambia and Egypt is the Nile River. It is considered the longest river in the world, flowing over 6,650 kilometers (4,130 miles). The Nile has two primary tributaries: the White Nile, which originates in East Africa, and the Blue Nile, which starts in Ethiopia. This river is vital for irrigation, agriculture, and transportation in the regions it traverses and has played a significant role in the development of ancient civilizations, especially in Egypt. The Nile's importance continues in modern times as it supports millions of people and various ecosystems.