Charles Darwin

Charles Robert Darwin was an English scientist well known for his work on the theory of evolution by natural selection. His discoveries changed the face of science, revealing mankind's evolutionary history and proposing the idea that species are gradually molded to better fit their environment through a process called "natural selection", whereby the more "fit" organisms survive to reproduce and pass on their genetic material, while "unfit" organisms die. His 1859 book On the Origin of Species established evolution as a theory.