Reproduction Rate Quotes

In the long run, Mohammed wins out. Christianity spreads primarily by conversion, Islam by conversion and reproduction.

The mers were also designed to reproduce only at long intervals, in order to maintain the natural balance of the environment in which they were placed.

How could you fear a dearth? Have not mankind tho' slain by millions, millions left behind?

Man, who preys both on the vegetable and animal species, is himself a prey to neither. He too possesses the reproductive principle far beyond the degree requisite for the bare continuance of his species. What becomes of the surplus of human life to which this principle is competent?

Formation of a new race takes place when, over several generations, individuals in one group reproduce more frequently among themselves than they do with individuals in other groups.

The rate of population growth in the United States is slightly below that required to reproduce itself.

Women of child-bearing age steadily run out of eggs by the continuous process of cell death. While reading a copy of the 'Guardian' carefully from cover to cover, a normal woman will have lost on average two eggs - while, typically, a normal man will have made 70,000 new sperm.

Men, like animals, naturally multiply in proportion to the means of their subsistence.

Among the innumerable Footsteps of Divine Providence to be found in the Works of Nature, there is a very remarkable one to be observed in the exact Balance that is maintained, between the Numbers of Men and Women; for by this means it is provided, that the Species may never fail, nor perish, since every Male may have its Female, and of a proportionable Age.

The germs of existence contained in this spot of earth, with ample food, and ample room to expand in, would fill millions of worlds in the course of a few thousand years.