Mars, therefore, is not only uninhabited by intelligent beings such as Mr. Lowell postulates, but is absolutely uninhabitable.

To say that mind is a product or function of protoplasm, or of its molecular changes, is to use words to which we can attach no clear conception

There is, I conceive, no contradiction in believing that mind is at once the cause of matter and of the development of individualised human minds through the agency of matter

There is a tendency in nature to the continued progression of certain classes of varieties further and further from the original type.

In less than eight years "The Origin of Species" has produced conviction in the minds of a majority of the most eminent living men of science. New facts, new problems, new difficulties as they arise are accepted, solved, or removed by this theory; and its principles are illustrated by the progress and conclusions of every well established branch of human knowledge.

Civilisation has ever accompanied emigration and conquest - the conflict of opinion, of religion, or of race

What birds can have their bills more peculiarly formed than the ibis, the spoonbill, and the heron?