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 ...

At 4,130 miles (6,650 km) long, the Nile in Africa is the longest river in the world. Some people consider the Amazon in South America to be longer. This is because the many hundreds of channels ...