Human Life
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Sherwood Sweet Knight. Human Life
Human Life
Table of Contents
CHAPTER I. The Habitat of Man
CHAPTER II. The Length of Time during which Man has Existed
CHAPTER III. The Physical Limitations of Existence
CHAPTER IV. The Purpose of Life
CHAPTER V. Knowledge and Education
CHAPTER VI. Religion and Ethics
CHAPTER VII. Love
CHAPTER VIII. Problems of the Future
Отрывок из книги
Sherwood Sweet Knight
Published by Good Press, 2021
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In the preceding chapter, no mention has been made of the length of the Quaternary sub-division of Cenozoic time, and it will now be our aim to briefly review this period and then investigate the evidence which we have as to how much of this time man has been a portion of its fauna.
With the opening of the Quaternary Period, we come to what is undoubtedly the most remarkable era in all geological time. From a climate which had been, heretofore, uniformly, warmly temperate, with but few exceptions, we come to a period known as the Glacial, in which, by a depression in the temperature, all vegetation and animals in high latitudes were killed; viz.: in the central west—almost to the Ohio River; in Europe—to the northern part of Italy—while the addition of vast quantities of ice to the oceans, destroyed all life in them to about the latitude of the northern portion of the Gulf of Mexico. Nor was this period of cold confined to the northern hemisphere, as the southern part of South America and Africa show. Concerning the cause of the Glacial Period, but little is positively known. Of the theories which have been advanced, it seems very plausible that perhaps two more clearly account for the conditions which must have then existed, if we consider them together, than all the rest.
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