The Orinoco River: South America's Arc of Life
The Orinoco River rises in the Parima Mountains of southern Venezuela and sweeps in a great arc through Venezuela and Colombia before spreading into a vast delta on the Atlantic coast. It is the third-largest river on Earth by discharge and a homeland for peoples such as the Warao, Piaroa, Ye'kwana and Yanomami. Its basin shelters river dolphins, giant otters and the critically endangered Orinoco crocodile, and it now faces mining, mercury contamination and oil-industry pressures that put much of that richness at risk.