X. Further Stages Of The Development Of Our Earth
According to the statements of modern natural science the face of our Earth once presented quite a different aspect from the present one. The ice-age followed the tropical climate and preceded the present temperate one. Every book on geology contains these facts. I am only telling you this in order to show you that the face of our Earth underwent great transformations in the course of certain epochs of time and that now it presents an entirely different aspect from that of the past.
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