In 2011, researchers discovered two new species of freshwater stingrays in the Amazon River.
The Heliotrygon (rosai and gomesi), commonly referred to as the Pancake stingrays, is the first new genus of stingrays from the Amazon described since 1987.
Along with the Missouri River and Jefferson River, it is regarded as the world’s fourth longest river.
Jefferson River is a tributary of the Missouri River, the longest river in the United States, that flows to the Mississippi River. The Mississippi-Missouri-Jefferson spans 6,275 kilometers.
On the top of the Mesa Vouno mountain are the ruins of the ancient city of Thera.
The city was inhabited in the 9th century BC. Archeologists discovered the Temple of Dionysus, the Sanctuary of Apollo, and Ancient Thera's cemetery there.
