Aimed primarily at a general readership and college students of biology, this book focuses on the question of how embryonic development changes in the course of evolution, thus giving rise to new types of creatures. It takes the view that biases in the ways that embryos can be altered are as important as natural selection in determining the directions that evolution has taken, including the one that led to the origin of humans. | Biased Embryos and Evolution by Wallace Arthur, Hardcover | Indigo Chapters