South America is a proper noun. South America is (1) the nations of the South American continent collectively, (2) a continent in the western hemisphere connected to North America by the Isthmus of Panama.
The following articles provide more information about the term South America.
South America was initially settled by Asians who crossed the Bering Strait approximately 4,000 to 5,000 years ago. They migrated southwards, reaching South America via the Isthmus of Panama.
Chocolate is a food made that is from the beans of cocoa trees. Learn about the two species of cocoa trees are native to Central America and the Amazon River basin in South America.
A fungal pathogen which has led to the extinction of entire species in South America has been recorded for the first time in critically endangered amphibians in India.
Science Daily. Wednesday, 13 Jun 2018 11:37:12 EDT.