Man could not stay there forever. He was bound to spread to new regions, partly because of his innate migratory tendency and partly because of Nature….

Nevertheless most of the evergreen forests of the north must always remain the home of wild animals and trappers, a backward region in which it is ea….

The whole history of life is a record of cycles..

With every throb of the climatic pulse which we have felt in Central Asia,, the centre of civilisation has moved this way and that. Each throb has se….

From first to last the civilization of America has been bound up with its physical environment..

Curiously enough man's body and his mind appear to differ in their climatic adaptations..

Year by year we are learning that in this restless, strenuous American life of ours vacations are essential..

The buffalo is a surprisingly stupid animal..

A journey of four hundred and thirty miles can be made in any part of the United States, but in Turkey it takes as many days..

In America the most widespread type of forest is the evergreen coniferous woodland of the north..

The human organism inherits so delicate an adjustment to climate that, in spite of man's boasted ability to live anywhere, the strain of the frozen N….

Although farming of any sort was almost as impossible in the plains as in the dry regions of winter rains farther west, the abundance of buffaloes ma….

For the source of any characteristic so widespread and uniform as this adaptation to environment we must go back to the very beginning of the human r….

Thus the races, though alike in their physical response to climate, may possibly be different in their mental response because they have approached A….

Although mountains may guide migrations, the plains are the regions where people dwell in greatest numbers..

No part of the world can be truly understood without a knowledge of its garment of vegetation, for this determines not only the nature of the animal ….

The coast of British Columbia was one of the three chief centers of aboriginal America..

As a matter of fact, an ordinary desert supports a much greater variety of plants than does either a forest or a prairie..

America forms the longest and straightest bone in the earth's skeleton..

History in its broadest aspect is a record of man's migrations from one environment to another..

Fertile soil, level plains, easy passage across the mountains, coal, iron, and other metals imbedded in the rocks, and a stimulating climate, all sho….