The expression often used by Mr. Herbert Spencer of the Survival of the Fittest is more accurate, and is sometimes equally convenient.

One general law, leading to the advancement of all organic beings, namely, multiply, vary, let the strongest live and the weakest die.

Dans la nature rien ne se crée, rien ne se perd, tout change.In nature nothing is created, nothing is lost, everything changes.

Dolphins and sharks are natural enemies. Dolphins are like, "Quit eating us," and sharks are like, "Stop smiling all the time, you morons.

Disease may be defined as 'A change produced in living things in consequence of which they are no longer in harmony with their environment.

Historians will have to face the fact that natural selection determined the evolution of cultures in the same manner as it did that of species.

Many investigators feel uneasy stating in public that the origin of life is a mystery, even though behind closed doors they admit they are baffled.

I'm doing now with cornets exactly what I used to do with trilobites: measuring, analyzing and cataloging the myriad gradations of their forms.

Natural selection is not the wind which propels the vessel, but the rudder which, by friction, now on this side and now on that, shapes the course.

A century ago, people laughed at the notion that we were descended from monkeys. Today, the individuals most offended by that claim are the monkeys.

A vida não pode existir sem ambos os processos, a ordem a partir da desordem para gerar vida e a ordem a partir da ordem para dar-lhe continuidade.

For humans—trapped in biology—there was no mercy: we lived a while, we fussed around for a bit and died, we rotted in the ground like garbage.

I am perhaps more proud of having helped to redeem the character of the cave-man than of any other single achievement of mine in the field of anthropology.

In microbiology the roles of mutation and selection in evolution are coming to be better understood through the use of bacterial cultures of mutant strains.

TP53 seems to encode the greater good, like a suicide pill in the mouth of a soldier that dissolves only when it detects evidence that he is about to mutiny.