A Quote by August Krogh

It is no doubt technically possible to study metabolism and respiration of fishes during swimming at a constant rate, and of certain insects and birds during flight, and to obtain information similar to that obtained on man during work on a bicycle ergometer or a treadmill.
There can be little doubt that fishes swimming rapidly do not make respiratory movements at all, but obtain the necessary ventilation of the gills simply by opening the mouth.
Speaking biologically, fruit in a slightly shriveled state is holding its respiration and energy consumption down to the lowest possible level. It is like a person in meditation: his metabolism, respiration, and calorie consumption reach an extremely low level. Even if he fasts, the energy within the body will be conserved. In the same way, when mandarin oranges grow wrinkled, when fruit shrivels, when vegetables wilt, they are in the state that will preserve their food value for the longest possible time.
[Man's] life consists in a relation with all things: stone, earth, trees, flowers, water, insects, fishes, birds, creatures, sun,rainbow, children, women, other men. But his greatest and final relation is with the sun.
Bird taxonomy is a difficult field because of the severe anatomical constraints imposed by flight. There are only so many ways to design a bird capable, say, of catching insects in mid-air, with the result that birds of similar habitats tend to have very similar anatomies, whatever their ancestry. For example, American vultures look and behave much like Old World vultures, but biologists have come to realize that the former are related to storks, the latter to hawks, and that their resemblances result from their common lifestyle.
Without birds to feed on them, the insects would multiply catastrophically. The insects, not man or other proud species, are really the only ones fitted for survival in the nuclear age. The cockroach, a venerable and hardy species, will take over the habitats of the foolish humans, and compete only with other insects or bacteria.
Nothing can injure a man's writing if he's a first-rate writer. If a man is not a first-rate writer, there's not anything can help it much. The problem does not apply if he is not first rate because he has already sold his soul for a swimming pool.
Basically, in the fight-or-flight response, the objective is to get away from the source of threat. All of our muscles prepare for this escape by increasing their tension level, our heart rate and respiration increase, and our whole basic metabolic system is flooded with adrenaline.
Man is the most powerful creature on the planet. And we're arrogant. I mean, people own birds. It's like, there's a creature with the gift of flight. I want it. I'm going to put it in my kitchen and make it crap on old information.
I'm obsessed with insects, particularly insect flight. I think the evolution of insect flight is perhaps one of the most important events in the history of life. Without insects, there'd be no flowering plants. Without flowering plants, there would be no clever, fruit-eating primates giving TED Talks.
It is not by the absolute quantity of produce obtained by either class, that we can correctly judge of the rate of profit, rent, and wages, but by the quantity of labour required to obtain that produce.
At seventy-three I learned a little about the real structure of animals, plants, birds, fishes and insects. Consequently when I am eighty I'll have made more progress. At ninety I'll have penetrated the mystery of things. At a hundred I shall have reached something marvellous, but when I am a hundred and ten everything I do, the smallest dot, will be alive.
I do not see why men sheould be so proud insects have the more ancient lineage according to the scientists insects were insects when man was only a burbling whatisit.
Never to have seen anything but the temperate zone is to have lived on the fringe of the world. Between the Tropic of Capricorn and the Tropic of Cancer live the majority of all the plant species, the vast majority of the insects, most of the strange ... quadrupeds, all of the great and most of the poisonous snakes and large lizards, most of the brilliantly colored sea fishes, and the strangest and most gorgeously plumaged of the birds.
I have drawn things since I was 6. All that I made before the age of 65 is not worth counting. At 73 I began to understand the true construction of animals, plants, trees, birds, fishes, and insects. At 90 I will enter into the secret of things. At 110, everything - every dot, every dash - will live. To all of you who are going to live as long as I do, I promise to keep my word. I am writing this in my old age, I used to call myself Hokusai, but today I sign myself 'The Old Man Mad About Drawing.'
It may well happen that what is in itself the more certain on account of the weakness of our intelligence, which is dazzled by the clearest objects of nature; as the owl is dazzled by the light of the sun. Hence the fact that some happen to doubt about articles of faith is not due to the uncertain nature of the truths, but to the weakness of human intelligence; yet the slenderest knowledge that may be obtained of the highest things is more desirable than the most certain knowledge obtained of lesser things.
The function of violence is to obtain reform by external means, the function of passive resistance, that is, soul-force, is to obtain it by growth from within, which, in its turn, is obtained by self-suffering, self-purification.
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