"Evidence as to Man's Place in Nature" by Thomas Henry Huxley is a book published in 1863. It presents anatomical and developmental evidence that humans and apes share a common ancestor, making it the first book devoted entirely to human evolution. Huxley compares the embryology, skulls, brains, and body structures of great apes and humans, arguing that the differences between humans and apes are smaller than those separating apes from each other. His conclusion challenges the notion that humans deserve separate classification from other primates. (This is an automatically generated summary.)