What is the longest river in the world?

The Nile River is widely considered the longest river in the world, with a length of approximately 6,650 kilometres. This distinction has been debated for many years, particularly as the Amazon River is often cited as being almost as long. Recent measurements suggest the Amazon may be slightly longer than the Nile, depending on how its tributaries are counted. However, the Nile remains the traditional choice due to centuries of historical and geographical records. Both rivers are remarkable in their own right, but for now, the title of longest river belongs to the Nile.