What is the longest river in the world, the Nile or the Amazon? It’s a question that has fuelled debate for years. Now, an expedition into the South American jungle aims to settle it for good.

The Amazon of course is also known as the largest river in the world, as it has the largest volume of water flow. So that's it right? The Nile wins? Well not quite. Some South American sources ...

The Amazon River is the longest in South America, and the second longest river on Earth after the Nile in Africa. The source (start) of the Amazon River is in the Andes Mountain range in Peru.