Considered then as a substitute for the action of an intelligent Creator, Laplace's theory utterly breaks down in three points, which, as they will have to be referred to hereafter, it is well to recapitulate. 1. It does not account for the origin of matter. 2. It does not account for the emergence of the force of attraction. 3. It does not give a satisfactory account for the motion of rotation. CHAPTER IV. DIFFICULTIES IN PHYSIOLOGY. The third science which is supposed to come into collision with the Mosaic Record is Physiology. Here, however, we meet with no objections which rest upon ascertained facts, as in the case of geology. We have only to do with theories. All that can be brought forward is merely matter of opinion or theory--such theory resting indeed on a foundation of ascertained facts--but being in itself a mere inference more or less probable from those facts. Even if it were proved to be a true account of the causation of those facts, it would be by no means certain that other facts, however similar, might not have had a totally different origin. At one time it was very confidently asserted, by many eminent physiologists, that the differences between various branches of the human race were so great, that it was impossible that all should have descended from the same original stock. Probably this opinion is still maintained in some quarters, but of late years views of a diametrically opposite character have been brought forward, and very ably advocated. In proportion as these views are admitted to have in them an element of truth, the importance of the older objection is diminished. It will therefore be unnecessary to dwell upon it. This new view is, that not only all branches of the human race, but all living beings now existing, or that have ever existed on the face of the earth, are descended by the process of "evolution," carried on under what are designated as "natural laws" from some one variety, or small number of varieties of living creatures of the lowest type.