The Amazon rainforest is the largest tropical rainforest in the world, covering over 5.5 million square kilometers across several countries, including Brazil, Peru, and Colombia. 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. This vital ecosystem plays a crucial role in regulating the global climate by absorbing carbon dioxide and producing oxygen. The Amazon River, which flows through the rainforest, is the second-longest river in the world and supports a wide variety of wildlife and human communities that depend on its resources.