The longest river on each of the seven continents?

* Nile River (6,650 km)

Asia

* Yangtze River (6,300 km)

Europe

* Volga River (3,530 km)

North America

* Mississippi River (3,734 km)

South America

* Amazon River (6,400 km)

Australia

* Murray River (2,375 km)

Antarctica

* Onyx River (30 km)