From tropical rainforests to the ocean, there's a lot to learn about iguanas! Iguanas grow to be around 6.5 feet long and come in many different colors. But unlike many lizards that eat bugs or rodents, iguanas prefer a salad. Through this beginner's guide to iguanas presented by Scientific American, readers explore the life, diet, and habitats of this large lizard. Readers learn about different kinds of iguanas and find out some of the strange ways iguanas have adapted to their environments.