South America takes its name from Amerigo Vespucci, an Italian cartographer who proved that Brazil and the West Indies represented an entirely new continent distinct from Asia. The continent formed its current shape around 3 million years ago with the formation of Panama connecting it to North America. It is dominated by a single tectonic plate and is home to the Amazon rainforest, river, and Andes Mountains, as well as Arctic birds due to its proximity to Antarctica.