The Paraná, the second-longest river in South America, spans four nations: Brazil, Paraguay, and Argentina. Its length is 4,880 kilometers. 4,880 kilometers is a considerable distance that offers many chances to discover remarkable things. One of the most fascinating findings in the case of the Paraná was found at its delta: a 120-meter-diameter island that was nearly fully … [Read more...] about This Circular Island in Argentina Rotates Continuously and Floats as Well.