Charles Darwin was a scientist who lived in the 1800s. He thought a lot about animals and plants and their different features. He wrote a lot of books and articles about his ideas. The Complete Works of Charles Darwin Online is a website that puts all of his books and articles in one place so that people can easily read and learn from them. It also includes lots of useful information and facts about Darwin, like where he lived, what else he studied, and what he said about different topics. By having all of this information in one place, it's much easier to learn about Darwin and his ideas!