This fundamental subject of Natural Selection will be treated at some length in the fourth chapter; and we shall then see how Natural Selection almost inevitably causes much Extinction of the less improved forms of life and induces what I have called Divergence of Character.
Charles DarwinI find in the domestic duck that the bones of the wing weigh less and the bones of the leg more, in proportion to the whole skeleton, than do the same bones in the wild duck; and this change may be safely attributed to the domestic duck flying much less, and walking more, than its wild parents.
Charles DarwinAnimals manifestly enjoy excitement, and suffer from annul and may exhibit curiosity.
Charles DarwinLanguage is an art, like brewing or baking.... It certainly is not a true instinct, for every language has to be learnt.
Charles Darwin