The 9 Longest Rivers in the World: From the Nile to the Congo

When it comes to rivers, longest doesn't necessarily mean biggest, and length can be difficult to determine, so the top spot will always be debated.

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The 9 Longest Rivers in the World: From the Nile to the Congo

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Geophysics, HowStuffWorks

The 9 Longest Rivers in the World: From the Nile to the Congo

Geophysics, HowStuffWorks

Geophysics, HowStuffWorks

The 9 Longest Rivers in the World: From the Nile to the Congo

Earth Science, HowStuffWorks

Environmental Science, HowStuffWorks