The Origin of Species Chapter 14 Part 2 - Mutual Affinities of Organic Beings

In which the remarkable conformity of structural patterns across diverse organisms reveals their descent from common ancestors, and the curious instances of rudimentary organs bear silent testimony to bygone functions, preserved by inheritance. Embryology further illuminates this kinship, showing how variations manifest at corresponding stages of development, thereby linking the embryos of distinct species and casting a genealogical light upon the natural classification of all beings.