Este brevísimo párrafo merece ser leído con el mayor detenimiento posible, porque lo que viene a decir (que no puede haber un cambio gradual….), significa que la Selección Natural no existe. Ni más ni menos:   317   We have seen in this chapter how cautious we should be in concluding that the most different habits of life could not graduate into each other; that a bat, for instance, could not have been formed by natural selection from an…