Animal existence

Definition and stakes

Charles Morris,  Popular Science Monthly (1881)

“ Seeking, then, for the features likely to distinguish the most highly developed animal, we may safely say that they will appear in that animal exposed to the most complex conditions, adapted to the greatest variety of food, possessed of the most fully specialized organs, capable of using its innate forces to the best advantage, and commencing its individual existence with the best start in life. ”
Source: Wikisource

Portrait of Thomas C. Chamberlin Thomas C. Chamberlin,  Geology (1906)

“ Within the animal world, the preying of one form upon another is the main source of that great struggle for existence which has characterized the whole known history of life, and has been one of the influential factors in shaping the evolution of life and in modifying the special aspects assumed by the floras and faunas of each period. ”
Source: Gutenberg

Portrait of Thomas Henry Huxley Thomas Henry Huxley,  Lay Sermons, Addresses and Reviews

“ All the great classes of animals, beasts of the field, fowls of the air, creeping things, and things which dwell in the waters, flourished upon the globe long ages before the chalk was deposited. Very few, however, if any, of these ancient forms of animal life were identical with those which now live. Certainly not one of the higher animals was of the same species as any of those now in existence. ”
Source: Gutenberg

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