Charles Darwin is widely recognized for his groundbreaking studies in zoology, particularly due to his theory of evolution by natural selection. His publication, The Origin of Species, profoundly changed the understanding of species development and adaptation. Darwin's work established him as a pivotal figure in the biological sciences, influencing not only zoology but also fields like genetics and ecology. His observations and collections, notably during the voyage on the HMS Beagle, provided essential insights that laid the foundation for modern evolutionary biology.