The amazing achievements of modern science have been opening every day new gates of wisdom and slowly bringing human minds nearer and nearer to the ultimate reality of the universe. The fire of knowledge kindled by science has already burnt down many dogmas and beliefs, held sacred by the superstition of the past, which stood in the way of truth-seeking minds. In the first place science has disproved the theory of the creation of the universe out of nothing by the action of some supernatural power. It has shown that the universe did not appear in its present form or come into existence all of a sudden only a few thousand years ago, but that it has taken ages to pass through different stages before it could reach its present condition. Each of these stages was directly related to a previous stage by the law of causation, which always operates in accordance with definite rules. The phenomena of the universe, according to science, are subject to evolution, or gradual change and progressive development from a relatively uniform condition to a relative complexity. From the greatest solar system down to the smallest blade of grass, everything in the universe has taken its present shape and form through this cosmic process of evolution. Our planet earth has gradually evolved, perhaps out of a nebulous mass which existed at first in a gaseous state. The sun, moon, stars, satellites and other planets have come into existence by going through innumerable changes produced by the evolutionary process of the Cosmos. Through the same process plants, insects, fishes, reptiles, birds, animals, man, and all living matter that inhabit this earth have evolved from minute germs of life into their present forms. The theory of Evolution says that man did not come into existence all of a sudden, but is related to lower animals and to plants, either directly or indirectly. The germ of life had passed through various stages of physical form before it could appear as a man. That branch of science which is called Embryology has proved the fact that "man is the epitome of the whole creation." It tells that the human body before its birth passes through all the different stages of the animal kingdom--such as the polyp, fish, reptile, dog, ape, and at last, man. If we remember that nature is always consistent, that her laws are uniform and that whatever exists in the microcosm exists also in the macrocosm, and then study nature, we shall find that all the germs of life which exist in the universe are bound to pass through stages resembling the embryonic types before they can appear in the form of man.