Happy 212th Birthday to Charles Darwin, born #OTD in 1809. #CharlesDarwin #DarwinDay Charles Darwin – one of the earliest Naturalists, best known for his contributions to the science of evolution. He established that all species of life have descended over time from common ancestors and, introduced his scientific theory that this branching pattern of evolution resulted from a process that he called natural selection, in which the struggle for existence has a similar effect to the artificial selection involved in selective breeding.