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more feet in stature. It is remarkable how this report of a visit to the Earth's interior corresponds with the other described above, yet both were entirely independent of each other. Also the gigantic size of the human beings dwelling in the Earth's interior corresponds to the great size of its animal life, as observed by Admiral Byrd, who, during his 1,700 mile flight beyond the North Pole, observed a strange animal resembling the ancient mammoth. We shall present later in this book the theory of Marshall Gardner that the mammoths found enclosed in ice, rather than being prehistoric animals, are really huge animals from the Earth's interior who were carried to the surface by rivers and frozen in the ice that was formed by the water that carried them. Chapter II THE HOLLOW EARTH across the Atlantic, in the form of a western continent, was considered as the dream of a madman. Equally strange, in our own time, is the belief in the existence of a New World, a Subterranean World, in the hollow interior of the Earth, and which is as unknown to present humanity as the American continent was to Europeans prior to its discovery by Columbus. Yet there is no reason why it, too, may not be discovered and its existence established as a fact. Arnoldo de Azevedo, in his "Physical Geography," wrote as follows about the mysterious world below our feet, concerning which scientists know nothing beyond a few miles in profundity, entertaining only theories, hypotheses and conjectures to hide their ignorance: "We have below, our feet an immense region whose radius is 6,290 kilometers, which is completely unknown, challenging the conceit and competence of scientists." This statement is absolutely true. Scientists to date have penetrated only a few miles inside the earth, and what lies further down they know nothing about, depending only on conjectures, guesses and suppositions. Many of the commonly accepted theories and beliefs about the Earth's interior do not rest on any scientific basis, and seem to originate in the old ecclesiastical idea of hellfire in the center of the Earth, which is so much like the belief of scientists that the a Ae ee | OW Ye on no more positive evidence than the religious one. Both are merely suppositions without an iota of proof. The belief in the Earth having a fiery center probably arose from the fact that the deeper one penetrates into the Earth, the warmer it gets. But it is a far-fetched assumption to suppose that this increase of temperature continues until the center of the Earth. There is no evidence to support this view. It is more probable that the increase of temperature continues only until we reach the level Before Columbus discovered America, belief in the existence of a New World core of the Earth is a mass of fire and molten metal. Yet the scientific belief rests