Colder Climates Meant Bigger Bodies For Ancient Humans
Human ancestors got steadily larger over the last 1 million years. Our relatives living in colder places developed bigger bodies, a new study finds.
February 12th is Darwin Day, an international, annual celebration commemorating the birthday of Charles Darwin, the English naturalist and geologist made famous for his theory of evolution by natural selection. We've all heard of Darwin, but what do we know about him?