“Warm-bloodedness is one of the key factors that have enabled mammals to conquer the Earth, and to develop the most complex bodies in the animal kingdom. In this series, we will travel the world to discover just how varied and how astonishing mammals are.”

— David Attenborough

Episode I
The Life of Mammals (2002)

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David Attenborough 70

British broadcaster and naturalist 1926

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“The message from the tropics is unambiguous: To be a successful big land animal, you must cope with mammals, and to cope with mammals you must be a mammal yourself, or at least have metabolism as high as a mammal's. And big mammals have suppressed big reptiles in our tropics for the last sixty-five million years. So how can the dinosaurs' success over mammals' be explained? By assuming that dinosaurs had low-energy metabolic styles? Not very likely.”

Robert T. Bakker book The Dinosaur Heresies

The Dinosaur Heresies: A Revolutionary View of Dinosaurs (1986), Longman Scientific & Technical, p. 101
The Dinosaur Heresies (1986)

“The classical view of dinosaurs presents a perplexing problem. The group of vertebrates which dominated the land before the rise of the dinosaurs were the synapsids, the mammal-like reptiles… Most paleontologists have believed that the locomotion and physiology of these mammal-like synapsids were more similar to those of active, warm-blooded mammals than to sluggish modern lizards or alligators. Surprisingly, though, when the first dinosaurs and their near relatives appeared in the Triassic period, the synapsids began to decline and soon became extinct. The dinosaurs then ruled the land unchallenged for over 100 million years while the early mammals, the surviving descendants of the synapsids, remained very small in size and number. Only after the dinosaurs suddenly disappeared about 70 million years ago did the mammals develop into the great variety of dominant land vertebrates we have today. The problem is this: if the later synapsids were such splendidly advanced animals with the improved physiology of mammals, and if dinosaurs were slow and sluggish, why were the mammal-like synapsids exterminated in competition with the first dinosaurs? And why didn't the mammals achieve a more significant diversification during the dinosaurs' reign?”

Robert T. Bakker (1945) American paleontologist

"The Superiority of Dinosaurs", Discovery 3(2),(1968) 11–22
The Superiority of Dinosaurs (1968)

“Living on the bodies of mammals, oxpeckers manage to get quite a varied diet. A maggot here, a tick there, a little sip of blood, perhaps a little tasty earwax.”

David Attenborough (1926) British broadcaster and naturalist

"The Insatiable Appetites"
The Life of Birds (1998)

“We're animals. We're born like every other mammal and we live our whole lives around disguised animal thoughts.”

Barbara Kingsolver Animal Dreams

Animal Dreams, page 118.
Animal Dreams (1990)

“That by any series of changes a protozoon should ever become a mammal, seems to those who are not familiar with zoology”

Herbert Spencer (1820–1903) English philosopher, biologist, sociologist, and prominent classical liberal political theorist

The Development Hypothesis (1852)
Context: That by any series of changes a protozoon should ever become a mammal, seems to those who are not familiar with zoology, and who have not seen how clear becomes the relationship between the simplest and the most complex forms when intermediate forms are examined, a very grotesque notion. Habitually, looking at things rather in their statical aspect than in their dynamical aspect, they never realize the fact that, by small increments of modification, any amount of modification may in time be generated.

“Our planet, the Earth, is, as far as we know, unique in the universe. It contains life. Even in its most barren stretches, there are animals. Around the equator, where those two essentials for life, sunshine and moisture, are most abundant, great forests grow. And here plants and animals proliferate in such numbers that we still have not even named all the different species. Here, animals and plants, insects and birds, mammals and man live together in intimate and complex communities, each dependent on one another. Two thirds of the surface of this unique planet are covered by water, and it was here indeed that life began. From the oceans, it has spread even to the summits of the highest mountains as animals and plants have responded to the changing face of the Earth.”

David Attenborough (1926) British broadcaster and naturalist

Opening narration
The Living Planet (1984)

“Dinosaurs seem strange, but that is just because we are mammals biased toward assuming the modern fauna is familiar and normal, and past forms are exotic and alien. Consider that elephants are bizarre creatures with their combination of big brains, massive limbs, oversized ears, teeth turned into tusks, and noses elongated into hose-like trunks. Nor were dinosaurs part of an evolutionary progression that was necessary to set the stage for mammals culminating into humans. What dinosaurs do show is a parallel world, one in which mammals were permanently subsidiary, whereas the dinosaurs show what largely diurnal land animals that evolved straight from similarly day-loving ancestors should actually look like. Modern mammals are much more peculiar, having evolved from nocturnal beasts that came into their own only after the entire elimination of nonavian dinosaurs. While dinosaurs dominated the land, small nocturnal mammals were just as abundant and diverse as they are in our modern world. If not for the accident of the later even, dinosaurs would probably still be the global norm.”

Gregory Scott Paul book The Princeton Field Guide to Dinosaurs

Gregory S. Paul (2010) The Princeton Field Guide to Dinosaurs, Princeton University Press, p. 14
The Princeton Field Guide to Dinosaurs

“Now, if instituting comparisons in both directions, we place the lowest and most ape-like men (the Austral Negroes, Bushmen, and Andamans, etc.), on the one hand, together with the most highly developed animals, for instance, with apes, dogs, and elephants, and on the other hand, with the most highly developed men—Aristotle, Newton, Spinoza, Kant, Lamarck, or Goethe—we can then no longer consider the assertion, that the mental life of the higher mammals has gradually developed up to that of man, as in any way exaggerated. If one must draw a sharp boundary between them, it has to be drawn between the most highly developed and civilized man on the one hand, and the rudest savages on the other, and the latter have to be classed with the animals.”

Baruch Spinoza (1632–1677) Dutch philosopher

Ernst Haeckel, The History of Creation: Or the Development of the Earth and its Inhabitants by the Action of Natural Causes [2 vols.]. Translated from the German by E. Ray Lankester. (New York: D. Appleton, 1876)
G - L

“As the dominant mammal on the face of the earth, as the clever one, the only one as far as we know capable of reflection and of accumulating knowledge, our duty is plain, to serve the lesser creation, to keep our world clean and pass on to posterity a record of which we shall not feel shame.”

Frank Fraser Darling (1903–1979) British scientist

Wilderness and Plenty (1970); as quoted in Stephen R. L. Clark, The Moral Status of Animals (Clarendon Press, 1977), p. 32.

“If one had the key to how a mental illness rises and how to take care of it, we would have done it better in the world.”

Kenneth Gärdestad (1948–2018) Swedish song lyricist, architect and lecturer

On mental illness, as quoted on Kenneth Gärdestad: Han ville inte gå någon annan väg än kärlekens väg, Sveriges Radio P4 Sörmland, published on 31 December 2015 (web) https://sverigesradio.se/sida/artikel.aspx?programid=87&artikel=6333872

“Warm-bloodedness is one of the key factors that have enabled mammals to conquer the Earth, and to develop the most complex bodies in the animal kingdom. In this series, we will travel the world to discover just how varied and how astonishing mammals are.”

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David Attenborough 70

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