James Watson shares his story of adventure in the Amazon rainforest with his friend Samuel Parker. He describes the immense size of the Amazon basin spanning multiple countries in South America and containing the largest rainforest in the world. Samuel notes the biodiversity of the Amazon, which is estimated to contain over half of the world's species, including 2 million insect species and thousands of plants and animals. Their discussion highlights both the ecological richness of the Amazon as well as threats to its environment and indigenous tribes from disease, development, and conflict.