Kathy Thompson, age 12, of Huntsville.Alabama for her question:

What river has the most water?

The world is longest rivers are the Nile, the Amazon and our Missouri Mississippi   which is actually one and the same river. The three giants are each about 4,000 miles long   give or take a few miles. In length, there is little to choose between them. But there is a great difference in the amount of water they carry to the ocean.

The most watery river in the world is, without question, the Amazon of South America. It carries more than all the waters in the Nile and the Mississippi plus the water carried by the great Yangtze river of China. The might Amazon gathers the drainage from two and a half million square miles of land and it carries more water by far than any other river.