Which is the world's longest river?

The Nile is considered the world's longest river because it stretches for approximately 6,650 kilometers (4,130 miles) from its source in Burundi to its mouth in Egypt, where it empties into the Mediterranean Sea. It traverses through 11 countries in northeastern Africa, including Tanzania, Uganda, South Sudan, Sudan, and Ethiopia. The Nile's historical and cultural significance, as well as its vital role in the development of ancient civilizations, further solidify its reputation as the longest river in the world.