"The Origin of Species" is a groundbreaking book published by Charles Darwin in 1859. It introduces the theory of evolution through natural selection, explaining how species adapt and change over time. Darwin's observations during his voyage on the HMS Beagle led him to propose that all species share common ancestors. The book challenges the traditional views of creation and provides evidence from various fields, including geology, paleontology, and morphology. It emphasizes the role of environmental pressures in shaping the traits of organisms, ultimately laying the foundation for modern biology and our understanding of life's diversity.