This natural phenomenon occurs in Brazil, in the city of Manaus. There are two streams that cross the city, namely the Amazon River and the Rio Negro. When the river water meets the boundary looks very perceptible because water Amazon River Brown and the other black. According to experts, this phenomenon occurs because of the difference in density, speed, and a water temperature of the two rivers. No doubt, the droves of tourists visiting the city of Manaus to see the natural wonders.
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