Life is life - whether in a cat, or dog or man. There is no difference there between a cat or a man. The idea of difference is a human conception for man's own advantage.
Cows are amongst the gentlest of breathing creatures; none show more passionate tenderness to their young when deprived of them; and, in short, I am not ashamed to profess a deep love for these quiet creatures.
If a rabbit defined intelligence the way man does, then the most intelligent animal would be a rabbit, followed by the animal most willing to obey the commands of a rabbit.
The greatness of a nation and its moral progress can be judged by the way its animals are treated. I hold that the more helpless a creature the more entitled it is to protection by man from the cruelty of humankind.
Nature makes only dumb animals. We owe the fools to society.
People get offended by animal rights campaigns. It's ludicrous. It's not as bad as mass animal death in a factory.
Why it is that animals, instead of developing in a simple and straightforward way, undergo in the course of their growth a series of complicated changes, during which they often acquire organs which have no function, and which, after remaining visible for a short time, disappear without leaving a trace ... To the Darwinian, the explanation of such facts is obvious. The stage when the tadpole breathes by gills is a repetition of the stage when the ancestors of the frog had not advanced in the scale of development beyond a fish.
The morphological characteristics of plant and animal species form the chief subject of the descriptive natural sciences and are the criteria for their classification. But not until recently has it been recognized that in living organisms, as in the realm of crystals, chemical differences parallel the variation in structure.
The last word in ignorance is the man who says of an animal or plant: 'What good is it?
The thing that differentiates man from animals is money.
No one likes to have less than they had before. That's the nature of the human animal.
The cat will mew, and dog will have his day.
A robin redbreast in a cage Puts all heaven in a rage.
It's sad. That's a living creature. We don't have the right to take their life away for fashion.
The chemical differences among various species and genera of animals and plants are certainly as significant for the history of their origins as the differences in form. If we could define clearly the differences in molecular constitution and functions of different kinds of organisms, there would be possible a more illuminating and deeper understanding of question of the evolutionary reactions of organisms than could ever be expected from morphological considerations.
Whoever said you can't buy Happiness forgot little puppies.
You can judge a man's true character by the way he treats his fellow animals.
[About gorillas] You take these fine, regal animals. How many (human) fathers have the same sense of paternity? How many human mothers are more caring? The family structure is unbelievably strong.
All animals, except man, know that the principal business of life is to enjoy it.
If animals could speak, the dog would be a blundering outspoken fellow; but the cat would have the rare grace of never saying a word too much.
During its development the animal passes through all stages of the animal kingdom. The foetus is a representation of all animal classes in time.
Generation by male and female is a law common to animals and plants.
Analogue. A part or organ in one animal which has the same function as another part or organ in a different animal.
Homologue. The same organ in different animals under every variety of form and function.
Animals manifestly enjoy excitement, and suffer from annul and may exhibit curiosity.
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