In human beings, the cerebellum occupies only 10 percent of the brain volume, yet has approximately 69 billion neurons; that is 80 percent of the nerve cells in the brain. In the book Evolution of the Cerebellar Sense of Self, published by Oxford University Press in January, co-authors David Bodznick and John Montgomery use an evolutionary perspective to explain cerebellar research to a wide audience. Bodznick is professor of biology, professor of neuroscience and behavior at Wesleyan, and Montgomery is professor of biology and marine science at the University of Auckland in New Zealand. The cerebellum first arose in jawed…