In fact, the history of North America has been perhaps more profoundly influenced by man's inheritance from his past homes than by the physical features of his present home.

The buffalo is a surprisingly stupid animal.

It will be a vast boon to mankind when we learn to prophesy the precise dates when cycles of various kinds will reach definite stages.

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.

The whole history of life is a record of cycles.

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

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's stern urgency.