South America’s second longest river, the Paraná, which has a length of 4,880 kilometers, flows through three countries: Brazil, Paraguay and Argentina. 4,880 kilometers is no short distance – it gives plenty of opportunities for discovering amazing things. In the case of the Paraná, one of the most exciting discoveries was made at its delta: an island 120 meters in diameter, … [Read more...] about This Circular Island in Argentina Not Only Floats, But Also Rotates Constantly