The Amazon Rainforest is a vast tropical rainforest located in South America, primarily in Brazil, but also extending into Peru, Colombia, and several other countries. It is known for its incredible biodiversity, housing millions of species of plants, animals, and insects, many of which are not found anywhere else on Earth. The Amazon River, one of the longest rivers in the world, flows through this region, providing essential water resources. The Sahara Desert is the largest hot desert in the world, covering parts of North Africa, including countries like Algeria, Egypt, and Sudan. It spans approximately 9.2 million square kilometers and is characterized by its arid climate, sand dunes, and rocky plateaus. Despite its harsh conditions, the Sahara is home to various nomadic tribes and unique wildlife adapted to survive in extreme temperatures.