But if the area be large, its several districts will almost certainly present different conditions of life; and then if natural selection be modifying and improving a species in the several districts, there will be intercrossing with the other individuals of the same species on the confines of each.
Even in the case of slow-breeding animals, which unite for each birth, we must not overrate the effects of intercrosses in retarding natural selection; for I can bring a considerable catalogue of facts, showing that within the same area, varieties of the same animal can long remain distinct, from haunting different stations, from breeding at slightly different seasons, or from varieties of the same kind preferring to pair together.
Just as we often compare nations by their relative land areas
, so if we compare these two worlds in the same way we have the strange anomaly of a larger world within a smaller one!
How vastly different from the flat and puny area of the circumscribed vision of the dweller upon the outer crust!
Ready to search a land area of 124,110,000 square miles for my friends, my incomparable mate, and good old Perry!
It comprises a sunken area of extreme tropical heat, and is inhabited by a nation of red men varying but little in manners, customs, and appearance from the balance of the red men of Barsoom.
The isolation of the Kaolians is rendered almost complete by the fact that no waterway connects their land with that of any other nation, nor have they any need of a waterway since the low, swampy land which comprises the entire area of their domain self-waters their abundant tropical crops.
She knew that her buoyancy tanks might keep her afloat indefinitely, but she had neither food nor water, and she was being borne toward the least-known area of Barsoom.
The air was filled with dust and flying bits of vegetation and when the storm carried her across an irrigated area of farm land she saw great trees and stone walls and buildings lifted high in air and scattered broadcast over the devastated country; and then she was carried swiftly on to other sights that forced in upon her consciousness a rapidly growing conviction that after all Tara of Helium was a very small and insignificant and helpless person.
The long swell caused by the gentle but steady action of the trade-wind, always blowing in one direction over a wide area
, causes breakers, almost equalling in force those during a gale of wind in the temperate regions, and which never cease to rage.
Fortunately for the pursued, the light of the moon, while it shed a flood of mild luster upon the little area
around the ruin, was not sufficiently strong to penetrate the deep arches of the forest, where the objects still lay in deceptive shadow.
I want you to take notice," he added to the others, as he gently touched the live-end of his fresh cigar to the area
of dark skin above and between the steward's eyes.