1. Frasi
  2. Autori
  3. Robert T. Bakker

Frasi di Robert T. Bakker

Robert Thomas Bakker è un paleontologo statunitense.

✵ 24. Marzo 1945
Robert T. Bakker photo

Lavori

The Dinosaur Heresies
Robert T. Bakker
The Dinosaur Heresies
Robert T. Bakker
Robert T. Bakker: 48 citazioni1 Mi piace

Robert T. Bakker frasi celebri

“La lezione tratta dai tropici è chiara: per essere un grande animale terrestre di successo, devi resistere contro i mammiferi, e per fare ciò dovresti o essere tu stesso un mammifero, o almeno avere un metabolismo ugualmente alto. I grandi mammiferi hanno soppresso i rettili grossi nei tropici per gli ultimi sessantacinque milioni di anni. Quindi, come si può spiegare il successo dei dinosauri contro i mammiferi? Partendo dal presupposto che i dinosauri avessero metabolismi lenti? Non è tanto probabile.”

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies

“I dinosauri non sono estinti. La diversità colorata e affermata degli uccelli odierni rappresenta una continuata espressione della biologia di base dei dinosauri.”

Robert T. Bakker

The dinosaurs are not extinct. The colorful and successful diversity of the living birds is a continuing expression of basic dinosaur biology.
Dinosaur Renaissance

“Si suppone che gli adrosauridi fossero nuotatori nello stile dei coccodrilli, sospingendosi con flessioni laterali della coda lenti e forti. Perciò, il disegno ideale incorporerebbe dei processi spinosi verticali sulla coda. Ma le spine dorsali dei becchi d'anatra erano fortemente inclinate all'indietro, esattamente come nelle lucertole terrestre e non come nei nuotatori specializzati.
Un altro problema con l'attrezzatura di nuoto degli adrosauridi sta nel profilo della coda. Nei coccodrilli, la parte più tozza della coda si trova vicino alla punta, siccome essa oscilla lungo un arco più largo della base. In questo modo, la coda è più tozza nel punto in cui può sospingere meglio l'animale nell'acqua. Tutti gli animali rematori infatti hanno la punta della coda tozza. Le code degli adrosauridi invece erano più tozze alle anche e diventavano man mano più snelle dalla base fino alla punta, un tratto caudale quasi totalmente inadeguato per la sua presunta funzione.”

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies

“Per molta gente, il dinosauro è il simbolo dell'estinzione, il prototipo d'un animale così maladattato a un ambiente fluido che si estingue, lasciando fossili, ma non discendenti.”

Robert T. Bakker

The dinosaur is for most people the epitome of extinctness, the proto­type of an animal so maladapted to a changing environment that it dies out, leaving fossils but no descendants.
Dinosaur Renaissance

“La struttura del ventriglio specializzato è identico negli uccelli e nei coccodrilli. Questo tipo di macinatore interno è assente negli altri "rettili" — lucertole, serpenti, e tartarughe.”

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies

“Non credo che gli uccelli meritino di essere messi in una classe tassonomica separata dai dinosauri.”

Robert T. Bakker

I do not be­lieve birds deserve to be put in a taxo­nomic class separate from dinosaurs.
Dinosaur Renaissance

Frasi su uccelli di Robert T. Bakker

“I dinosauri non sono lucertole, e viceversa. Le lucertole sono rettili squamosi d'una dinastia antica. Le lucertole più antiche precedono i primi dinosauri di ben trenta milioni di anni. Alcune lucertole grandi, come il varano di Komodo mangia-uomini, sono state nominate "superstiti dell'epoca dei dinosauri", ma questa frase è storicamente scorretta. Nessuna lucertola ha mai mostrato nel corso della sua evoluzione le caratteristiche simili a quelle degli uccelli visibili in ogni dinosauro. Una grande lucertola non ha mai assomigliato un piccolo dinosauro, tranne per qualche dettaglio insignificante nei denti. Le lucertole non camminano mai con la postura eretta a passi lunghi, caratteristiche che contraddistinguono gli uccelli terrestri odierni simili a dinosauri o i dinosauri del Mesozoico simili a uccelli.”

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies

“Gli zoo ingannano i loro visitatori per il modo in cui sono collocate le diverse specie. Gli uccelli sono naturalmente nel reparto uccelli, mentre i coccodrilli vengono sempre segregati nel reparto rettili con le altre bestie squamose, sprovviste di penne. In questo modo, il visitatore torna a casa totalmente persuaso che i coccodrilli sono rettili, mentre gli uccelli rappresentano un gruppo completamente diverso caratterizzato dal volo e dal piumaggio — tratti "non-rettiliani". Ma i corpi di un tacchino e un coccodrillo, messi l'uno accanto all'altro sul tavolo di un laboratorio, sarebbero in grado di evidenziare quanto torto hanno gli zoo, nel momento in cui venissero aperti i rispettivi stomaci. L'anatomia dei loro ventrigli è una prova robusta della stretta parentela tra i due animali e del fatto che essi andrebbero messi insieme nella classificazione zoologica, se non nei giardini zoologici.”

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies

“Nessuno, sia nel diciannovesimo secolo che nel ventesimo, ha mai formulato un'ipotesi convincente che dimostrasse che i dinosauri in generale erano più simili ai coccodrilli rettiloidi che agli uccelli a sangue caldo. Nessuno l'ha fatto perché non si può fare.”

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies

“Da soli, i ventrigli dei brontosauri non danno indizi su quanto o che cosa mangiavano questi dinosauri quotidianamente; vanno adoperati altri metodi d'investigazione per chiarire tali questioni. I loro ventrigli e i loro denti tuttavia possono indicarci ciò che essi non mangiavano, ovvero la vegetazione soffice e molliccia. Gli uccelli che si nutrono di frutti soffici non posseggono ventrigli muscolosi e non introducono sassolini duri nei loro ventrigli. Il cibo molle e acquoso necessita solo di un intestino corto e semplice, dotato di una minima forza contrattile per spremerlo.
Inoltre, i denti dei brontosauri confermano l'ipotesi eretica che la loro alimentazione consistesse di vegetali duri. Se i brontosauri avessero mangiato solo piante acquatiche mollicce, ci si aspetterebbe di trovare poche tracce d'usura sui denti. Invece, i denti del Camarasaurus, Brachiosaurus e dei loro parenti dimostrano segni d'usura molto evidenti, che possono essere causati solamente da cibo duro o granuloso.”

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies

Robert T. Bakker Frasi e Citazioni

“La somma delle prove evolutive è totalmente schiacciante. In quasi ogni modificazione del processo evolutivo degli adrosauridi, mentre si sviluppavano dai loro antenati driosauri, essi subirono una diminuzione delle loro capacità di nuotare. I loro arti anteriori e posteriori divennero più tozzi e compatti, non più lunghi e palmati e le loro code divennero più deboli e rigide. Gli adrosauridi, ben lontani dall'essere i migliori nuotatori tra i dinosauri, devono essere stati, al contrario, i più goffi e lenti. Se costretti, avrebbero probabilmente potuto sguazzare lentamente da un argine all'altro. Il tema centrale della loro evoluzione corporea era specializzato (su questo, l'ortodossia ha ragione), ma nella direzione della terra ferma. Questi dinosauri erano specializzati per un'esistenza puramente terrestre.”

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies

“La percezione classica dei dinosauri rivela un problema sconcertante. Il gruppo di vertebrati che dominavano la terra prima dell'ascesa dei dinosauri erano i sinapsidi, rettili simili a mammiferi… La maggior parte dei paleontologi ha creduto che la locomozione e la fisiologia di questi rettili-mammiferi fossero più simili a quelle dei mammiferi attivi a sangue caldo che non a quelle di lucertole o di goffi alligatori odierni. Sorprendentemente però, quando i dinosauri e i loro parenti apparirono nel periodo Triassico, i sinapsidi cominciarono a scomparire, fino all'estinzione. Successivamente, i dinosauri dominarono la terra senza opposizione per cento milioni di anni, mentre i mammiferi primitivi, i discendenti superstiti dei sinapsidi, rimasero minuscuoli in statura e in popolazione. Fu solo dopo la improvvisa scomparsa dei dinosauri circa settanta milioni di anni fa che i mammiferi si evolsero nella marea di vertebrati terrestri che abbiamo oggi. Il problema consiste in questo: se i sinapsidi fossero stati animali così ben avanzati dotati della fisiologia superiore dei mammiferi, e se i dinosauri fossero stati lenti e goffi, perché allora i sinapsidi furono sterminati durante la loro concorrenza con i primi dinosauri? E perché i mammiferi non si sono diversificati di più durante il regno dei dinosauri?”

Robert T. Bakker

The Superiority of Dinosaurs

“Il morso del tirannosauro è unico tra i dinosauri meglio conosciuti. Invece di infliggere un taglio lungo e superficiale, le mascelle del tirannosauro riuscivano a conficcare i denti fino all'osso, uccidendo così un Triceratops con un solo colpo. Qui si tratta di una co-evoluzione stretta, una corsa agli armamenti cretacica all'ultimo sangue. Triceratops era il dinosauro cornuto più comune dell'ultima epoca dei dinosauri, il Lanciano. Il triceratopo era diverso nel modo in cui sviluppava il collare osseo. Il Torosaurus, assai raro durante l'epoca Lanciana del Cretaceo, conservava la forma base: il suo collare era composto di lunghe ossa sottili che convergevano a formare una cornice, con due aperture enormi in mezzo. Il Triceratops, invece, riempiva queste aperture con osso rinforzato. Perché il Triceratops avrebbe dovuto moltiplicare la massa ossea del suo collare di ben cinque volte? Be'… per me la risposta è ovvia: fu perché il predatore più comune aveva sviluppato denti enormi adatti a penetrare la sua armatura. L'argomento può anche essere considerato all'inverso - T. rex sviluppò denti lunghi e robusti apposta per prevalere sulla protezione inusuale dell'erbivoro cornuto più comune.”

Robert T. Bakker

“I mezzi per la difesa attiva più pericolosi nei dinosauri emersero indubbiamente nei Triceratops. La scena è stata raffigurata nei dipinti, nei disegni e nelle illustrazioni centinaia di volte, ma non perde il suo fascino. Il Tyrannosaurus, il più abile dei dinosauri toreri, si scontra con il Triceratops, fornito delle corna più grandi tra i dinosauri. Nessun altro scontro tra predatore e preda è mai stato così drammatico. È in qualche modo giusto il fatto che questi due enormi antagonisti potessero vivere la loro belligeranza co-evolutiva negli ultimi giorni dell'ultima epoca dell'era dei dinosauri. Tyrannosaurus misurava sei metri d'altezza quando stava eretto e un grosso adulto pesava come un piccolo elefante — cinque tonnellate. Nessun altro carnivoro terrestre, dinosauro o no, aveva mascelle così possenti. Per sopravvivere a un attacco da parte d'un Tyrannosaurus era necessaria o una corazza da carro armato, come quella sviluppata dall'Ankylosaurus, o armi da difesa potenti, come quelle del Triceratops.”

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies

“Ci potrebbe essere qualche buona spiegazione per credere che i brontosauri mangiassero… cibi soffici. Se la possibilità dei sassolini nel ventriglio venisse ignorata, i denti dei brontosauri sembrerebbero infatti poco adatti ad eventuali pasti a base piante dure. Ma non c'è alcuna base per fare un'ipotesi dello stesso tipo a proposito degli adrosauridi. Le fauci di un adrosauro possedevano dei veri e propri frullatori cranici, probabilmente tra i più efficienti nella storia dei vertebrati. I loro denti e le loro mascelle erano macinatori incomparabili, fatti a posta per occuparsi dei cibi direttamente nella bocca.”

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies

“Se usassimo la longevità come misura di successo, allora i dinosauri devono per forza essere considerati il successo più grande della storia della vita. Non solo avevano il monopolio indiscusso nel ruolo di animali terrestri giganti, ma mantennero la loro posizione dominante per una durata di tempo straordinaria - centotrenta milioni di anni. La nostra stessa razza umana non ha che centomila anni dietro, e la nostra classe zoologica, Mammalia, il clan di creature pelose a sangue caldo, ha governato la terra ferma per solo settanta milioni di anni. Certo, i dinosauri sono estinti, ma dovremmo stare attenti nel giudicarli inferiori a noi. Chi può dire che il sistema umano durerà altri mille anni, tanto meno centomila? Chi può prevedere che la nostra Classe Mammalia governerà per altri mille millenni?”

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies

“Le lucertole carnivore giganti non possono evolversi in presenza di grossi mammiferi predatori. La morale è che i mammiferi sopprimono molto del potenziale evolutivo delle lucertole odierne. Il varano di Komodo rappresenta un buon punto di riferimento per il successo dei dinosauri? Assolutamente no. Furono i dinosauri a sopprimere il potenziale evolutivo dei mammiferi e non viceversa. I dinosauri innescarono questa soppressione ovunque, in tutti i continenti e non solo su qualche isoletta tropicale. I dinosauri ebbero la meglio là dove il varano di Komodo ha fallito.”

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies

“Quando i dinosauri caddero alla fine del Cretaceo, non erano un gruppo decrepito e moribondo che aveva finito le proprie opzione evolutive. Erano vigorosi invece, stavano ancora diversificandosi in nuovi ordini e producendo una marea di carnivori dotati di grandi cervelli con il grado d'intelligenza più elevato di quel tempo.”

Robert T. Bakker

Dinosaur Renaissance

Robert T. Bakker: Frasi in inglese

“Twentieth-century paleontologists have fallen into the bad habit of reconstructing the dinosaurs' life functions by using crocodiles as a living model. But the earliest researchers of the nineteenth century proved beyond a doubt that the dinosaurs' powerful hind limbs must have operated like the limbs of gigantic birds.”

Help us translate this quote

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies: A Revolutionary View of Dinosaurs (1986), Longman Scientific & Technical, p. 20
The Dinosaur Heresies (1986)

“One might expect that mammals would have taken over the land verte­brate communities immediately, but they did not. From their appearance in the Triassic until the end of the Creta­ceous, a span of 140 million years, mam­mals remained smal and inconspicuous while all the ecological roles of large ter­restrial herbivores and carnivores were monopolized by dinosaurs; mammals did not begin to radiate and produce large species until after the dinosaurs had al­ready become extinct at the end of the Cretaceous. One is forced to conclude that dinosaurs were competitively su­perior to mammals as large land vertebrates. And that would be baffling if dinosaurs were "cold-blooded."”

Help us translate this quote

Robert T. Bakker

Perhaps they were not.
"Dinosaur Renaissance", Scientific American 232, no. 4 (April 1975), 58—78
Dinosaur Renaissance (1975)

“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?”

Help us translate this quote

Robert T. Bakker

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

“Without doubt the most dangerous devices for active defense among the Dinosauria emerged in Triceratops. The scene has been portrayed in paintings, drawings, and illustrations hundreds of times, but it remains thrilling. Tyrannosaurus, the greatest dinosaur toreador, confronts Triceratops, the greatest set of dinosaur horns. No matchup between predator and prey has ever been more dramatic. It's somehow fitting that those two massive antagonists lived out their co-evolutionary belligerence through the very last days of the very last epoch in the Age of Dinosaurs. Tyrannosaurus stood over twenty feet tall when fully erect, and a large adult was as heavy as a small elephant - five tons. No predatory dinosaur, no predatory land animal of any sort, had more powerful jaws. Withstanding a Tyrannosauruss attack required either tanklike armor – the approach taken by Ankylosaurus”

Help us translate this quote

Robert T. Bakker libro The Dinosaur Heresies

or most powerful defensive weapons - the approach taken by Triceratops.
The Dinosaur Heresies: A Revolutionary View of Dinosaurs (1986), Longman Scientific & Technical, p. 240-241
The Dinosaur Heresies (1986)

“There may be some ground for believing that brontosaurs ate… soft foods. If the possibility of gizzard stones is ignored, the brontosaurs' dentition does seem little equipped to deal with meals of tougher plants. But there are no ground whatsoever for believing it of duckbills. The mouth of a duckbill dinosaur contained one of the efficient cranial Cusinarts in land-vertebrate history. Duckbill teeth and jaws were incomparable grinders, designed to cope with foods right inside the duckbill's oral compartment.”

Help us translate this quote

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies: A Revolutionary View of Dinosaurs (1986), Longman Scientific & Technical, p. 160-161
The Dinosaur Heresies (1986)

“Giant predator lizards can't evolve in the presence of big mammal predators. So the lesson is that mammals suppress much of the evolutionary potential of modern lizards. Is the Komodo dragon a good working model of how dinosaurs succeeded? Absolutely not. Dinosaurs suppressed the evolutionary potential of mammals, not the other way around. And dinosaurs carried out this supression everywhere, on all the continents, not merely on a few tiny tropical isles. Dinosaurs succeeded where Komodo dragons fail.”

Help us translate this quote

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies: A Revolutionary View of Dinosaurs (1986), Longman Scientific & Technical, p. 81
The Dinosaur Heresies (1986)

“Humans are proud of themselves. The guiding principle of the modern age is "Man is the measure of all things." And our bodies have excited physiologists and philosophers to a profound awe of the basic mammalian design. But the history of the dinosaurs should teach us some humility… If our fundamental mammalian mode of adaptation was superior to the dinosaurs', then history should record the meteoric rise of the mammals and the eclipse of the dinosaurs. Our own Class Mammalia did not seize the dominant position in life on land. Instead, the mammal clan was but one of many separate evolutionary families that succeeded as species only by taking refuge in small body size during the Age of Dinosaurs. As long as there were dinosaurs, a full 130 million years, remember, the warm-blooded league of furry mammals produced no species bigger than a cat.”

Help us translate this quote

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies: A Revolutionary View of Dinosaurs (1986), Longman Scientific & Technical, p. 17
The Dinosaur Heresies (1986)

“When the dinosaurs fell at the end of the Cretaceous, they were not a senile, moribund group that had played out its evolutionary options. Rather they were vigorous, still diversifying into new or­ders and producing a variety of big­brained carnivores with the highest grade of intelligence yet present on land.”

Help us translate this quote

Robert T. Bakker

"Dinosaur Renaissance", Scientific American 232, no. 4 (April 1975), 58—78
Dinosaur Renaissance (1975)

“The dinosaurs are not extinct. The colorful and successful diversity of the living birds is a continuing expression of basic dinosaur biology.”

Help us translate this quote

Robert T. Bakker

"Dinosaur Renaissance", Scientific American 232, no. 4 (April 1975), 58—78
Dinosaur Renaissance (1975)

“The total turtle count - two hundred and thirty species - doesn't seem like an irresistible horde compared to the several thousand mammals in today's global ecosystem. However, turtles have scored quite an impressive ecological triumph in one very important role, that of freshwater predator-omnivore… All through the Temperate Zone, otters delight the naturalist and the lay public. But how many other freshwater, semi-aquatic mammal predators can you name? Mink, of course. Relatives of otters on one hand, land weasels on the other, mink do hunt in streams. How many others? If you caught the excellent BBC series "Life on Earth", you saw footage of the swimming shrew, the Desman of the Pyrenees, a molelike furball that dives for aquatic worms and other freshwater small fry. Our own New England star-nosed mole goes hunting in water, using its starburst-shaped snout tip to feel out wriggling prey. Andean streams flowing through Preu are host to the fish-spearing mouse, Ichthyomys, that impales prey on its projecting front teeth. But if we go to a tropical lake or sluggish river, is it full of otters, mink, and paddling shrews? No, it is full of turtles.”

Help us translate this quote

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies: A Revolutionary View of Dinosaurs (1986), Longman Scientific & Technical, p. 57
The Dinosaur Heresies (1986)

“Ceratosaurus is and has been my favorite dino since 1958. This is a minority taste. I’ve met only one dino-digger who rated it #1 in desirability.”

Help us translate this quote

Robert T. Bakker

As quoted in Dr. Robert Bakker Answers Your Questions http://science.slashdot.org/story/13/03/10/2217251/dr-robert-bakker-answers-your-questions, science.slashdot.org, (March 11, 2013)

“Dinosaurs are not lizards, and vice versa. Lizards are scaley reptiles of an ancient bloodline. The oldest lizards antedate the earliest dinosaurs by a full thirty million years. A few large lizards, such as the man-eating Komodo dragon, have been called "relicts of the dinosaur age", but this phrase is historically incorrect. No lizard ever evolved the birdlike characteristics peculiar to each and every dinosaur. A big lizard never resembled a small dinosaur except for a few inconsequential details of the teeth. Lizards never walk with the erect, long-striding gait that distinguishes the dinosaurlike ground birds today or the birdlike dinosaurs of the Mesozoic.”

Help us translate this quote

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies: A Revolutionary View of Dinosaurs (1986), Longman Scientific & Technical, p. 22-23
The Dinosaur Heresies (1986)

“No living reptile has cheeks. But no living reptile has grinding teeth anything remotely resembling those of a duckbill. If the duckbills could have evolved such unreptilian teeth, why couldn't they have evolved unreptilian teeth?”

Help us translate this quote

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies: A Revolutionary View of Dinosaurs (1986), Longman Scientific & Technical, p. 165
The Dinosaur Heresies (1986)

“Zoos mislead their visitors by the way the species are housed. Birds are in the Bird House, of course, and crocodiles are always segregated to the Reptile House with the other naked-skinned, scale-covered brutes. So the average visitor leaves the zoo firmly persuaded that crocodilians are reptiles while birds are an entirely different group defined by "unreptilian" characteristics - feathers and flight. But a turkey's body and a croc's body laid out on a lab bench would present startling evidence of how wrong the zoos are once the two stomachs were cut into. The anatomy of their gizzards is strong evidence that crocodilians and birds are closely related and should be housed together in zoological classification, if not in zoo buildings.”

Help us translate this quote

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies: A Revolutionary View of Dinosaurs (1986), Longman Scientific & Technical, p. 127
The Dinosaur Heresies (1986)

“If we measured success by longevity, then dinosaurs must rank as the number one success story in the history of land life. Not only did dinosaurs exercise an airtight monopoly as large land animals, they kept their commanding position for an extraordinary span of time - 130 million years. Our own human species is no more than a hundred thousand years old. And our own zoological class, the Mammalia, the clan of of warm-blooded furry creatures, has ruled the land ecosystem for only seventy million years. True, the dinosaurs are extinct, but we ought to be careful in judging them inferior to our own kind. Who can say that the human system will last another thousand years, let alone a hundred million? Who can predict that our Class Mammalia will rule for another hundred thousand millennia?”

Help us translate this quote

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies: A Revolutionary View of Dinosaurs (1986), Longman Scientific & Technical, p. 16
The Dinosaur Heresies (1986)

“By themselves, brontosaur gizzards don't indicate how much or what these dinosaurs ate each day; other lines of evidence must be employed to explore these questions. But brontosaur gizzards and teeth together indicate what brontosaurs did not eat. They didn't eat soft, mushy vegetation. Birds that subsist entirely on soft fruits don't possess muscular gizzards and don't use hard pebbles for their gizzard linings. Soft, watery food requires only a short, simply constructed gut - with just enough contractile force to squeeze out all the juices.
Brontosaur teeth, moreover, confirm the heretical idea that they ate a tough vegetable diet. If the brontosaurs dined only on soft water plants, then very little wear would be found on their teeth. But in fact the teeth of Camarasaurus, Brachiosaurus, and their kin manifest very severe wear, which could only have been produced by tough or gritty food.”

Help us translate this quote

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies: A Revolutionary View of Dinosaurs (1986), Longman Scientific & Technical, p. 136-137
The Dinosaur Heresies (1986)

“Duckbills were supposedly croc-style swimmers, moving by strong, easy, side-to-side flexures of their tail. Therefore, the optimal design would feature vertical tail spines. But duckbill spines all slanted strongly backward, exactly as in land-living lizards, not in swimmers.
Another problem in the duckbill's swimming equipment lies in the profile of the tail. The deepest part of the croc's tail is close to the end, because the end swings through a wider arc than does the base in moving side to side. Thus the tail is deepest where it can do the most good in pushing against the water. All powerful tail-scullers have such deep tail ends. But duckbill tails were deepest at the hips and become progressively narrower from top-to-bottom toward the tip - another caudal feature nearly totally maladapted for its primary function.”

Help us translate this quote

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies: A Revolutionary View of Dinosaurs (1986), Longman Scientific & Technical, p. 153
The Dinosaur Heresies (1986)

“Most experts have assumed that the allosaurs, about 35 feet long, were the worst threats to the herbivores of the Jurassic, some of which were gigantic and probably able to fend off even an allosaur. But epanterias would have spelled trouble for everyone.”

Help us translate this quote

Robert T. Bakker

As quoted in Malcolm W. Browne, Scientist Raises Question: Is Tyrannosaurus Still Rex? http://www.nytimes.com/1990/01/04/us/scientist-raises-question-is-tyrannosaurus-still-rex.html, The New York Times (January 4, 1990)

“The sum of evolutionary evidence is thoroughly damning. In nearly every modification of the evolutionary process made in the duckbills as they developed from their dryosaur ancestors, the duckbills suffered a diminution of their swimming potential. Their fore- and hind paws became shorter and more compact, not longer and more widely spread. Their tails got weaker and stiffer. Far from being the best, the duckbills must have been the clumsiest and slowest swimmers in all the Dinosauria. If pressed, they probably could paddle slowly from one riverbanck to another. The central theme of their bodily evolution was indeed specialized - orthodox theory was right on that point - but the direction of specialization was landward. These dinosaurs were specialized for a totally terrestrial existence.”

Help us translate this quote

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies: A Revolutionary View of Dinosaurs (1986), Longman Scientific & Technical, p. 154-155
The Dinosaur Heresies (1986)

“No one, either in the nineteenth century or the twentieth, has ever built a persuasive case proving that dinosaurs as a whole were more like reptilian crocodiles than warm-blooded birds. No one has done this because it can't be done.”

Help us translate this quote

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies: A Revolutionary View of Dinosaurs (1986), Longman Scientific & Technical, p. 27
The Dinosaur Heresies (1986)

“The rex bite is unique among better known dinosaurs. Instead of inflicting a long, shallow wound, rex jaws would thrust a few crowns deep into bone armor, killing a Triceratops with a single blow. We see close-linked co-evolution here, a terminal Cretaceous arms race. Triceratops is the commonest horned dino of the time, the final dinosaurian Age, the Lancian. T’tops departs from the ceratopsian tradition of frill construction. Torosaurus, very rare during the Lancian Age of the Cretaceous, retains that basic design: the frill is composed of thin bone rods that make a frame, with huge holes in the middle. Triceratops fills in the holes with greatly thickened bone. Why would Triceratops invest in five times as much bone volume in its frill? Well…to me the answer is obvious. Because the commonest predator has evolved great, armor-penetrating teeth. The argument goes in the other direction – T. rex evolved swollen, tall tooth crowns to deal with the unusual protection of the commonest horned herbivore.”

Help us translate this quote

Robert T. Bakker

As quoted in Paleontological Profiles: Robert Bakker http://scienceblogs.com/laelaps/2008/04/07/paleontological-profiles-rober/, scienceblogs (April 7, 2008)

“Our own mammalian order, the primates, prides itself on hand-eye coordination, monkeys, apes, and man are all good manipulators. But no mammal can rival the chameleon for eye-tongue coordination.”

Help us translate this quote

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies: A Revolutionary View of Dinosaurs (1986), Longman Scientific & Technical, p. 68
The Dinosaur Heresies (1986)

“I do not be­lieve birds deserve to be put in a taxo­nomic class separate from dinosaurs.”

Help us translate this quote

Robert T. Bakker

"Dinosaur Renaissance", Scientific American 232, no. 4 (April 1975), 58—78
Dinosaur Renaissance (1975)

“Up to eight feet long and as heavy as a lioness, the adult Komodo dragon brandishes steak-knifelike teeth - sharp, recurved blades with serrated cutting edges. Showing the same sagacity found in veteran Nile crocodiles, fully adult dragons know their hunting territory from years of experience. They know where to lie along hilly game trails, awaiting the light footsteps of a deer. Attacks are instant successes or failures because the ora has no stamina, and if it misses on the first short rush, it has little sustained speed for a long pursuit. When an attack succeeds, the cruel rows of slashing teeth cut fearful wounds on the rump and thigh of ambushed animals and the stricken prey may die of massive infection days later even if it manages to break free from the dragon's mouth. Tethered livestock suffer truly terrible cuts across the legs when an ora slinks into the compound under cover of the warm Indonesian nights. Several humans, both native and European visitors, have died in savage daylight attacks. The victims simply had no warning sign that the ora was waiting patiently a few feet from the trail's edge.”

Help us translate this quote

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies: A Revolutionary View of Dinosaurs (1986), Longman Scientific & Technical, p. 62-63
The Dinosaur Heresies (1986)

“Even 'Jurassic Park III' tried to jump on the avian-dino bandwagon by making a brave attempt to adorn Velociraptor with a feathery hair-piece. (The result looked like a roadrunner's toupee- don't blame the effects-artists; it's notoriously difficult to render feathers in computer graphics animation, so we'll have to wait for 'JP IV' for a more thoroughly rendered avian pelage.)”

Help us translate this quote

Robert T. Bakker

“Dinosaurs Acting Like Birds, and Vice Versa – An Homage to the Reverend Edward Hitchcock, First Director of the Massachusetts Geological Survey” in Feathered Dragons. Currie, P.; Koppelhus, E.; Shugar, M.; Wright J. eds. 2004. Bloomington: Indiana University Press. pp. 1-11.

“Both birds and crocs have the identical plan to their specialized gizzard apparatus, and this type of internal food processor is absent in the other "reptiles"”

Help us translate this quote

Robert T. Bakker libro The Dinosaur Heresies

lizards, snakes, and turtles.
The Dinosaur Heresies: A Revolutionary View of Dinosaurs (1986), Longman Scientific & Technical, p. 127
The Dinosaur Heresies (1986)

“Plants and plant-eaters co-evolved. And plants aren't the passive partners in the chain of terrestrial life. Hence today's Pop Ecology movement is quite wrong in believing that plants are happy to fill their role as fodder for herbivores in a harmonious and perfectly balanced ecosystem. A birch tree doesn't feel cosmic fulfillment when a moose munches its leaves; the tree species, in fact, evolves to fight the moose, to keep the animal's munching lips away from vulnerable young leaves and twigs. In the final analysis, the merciless hand of natural selection will favor the birch genes that make the tree less and less palatable to the moose in generation after generation. No plant species could survive for long by offering itself as unprotected fodder.”

Help us translate this quote

Robert T. Bakker libro The Dinosaur Heresies

The Dinosaur Heresies: A Revolutionary View of Dinosaurs (1986), Longman Scientific & Technical, p. 179
The Dinosaur Heresies (1986)

“Dinosaurs have a bad public image as symbols of obsolescence and hulking in­ inefficiency; in political cartoons they are know-nothing conservatives that plod through miasmic swamps to inevitable extinction.”

Help us translate this quote

Robert T. Bakker

"Dinosaur Renaissance", Scientific American 232, no. 4 (April 1975), 58—78
Dinosaur Renaissance (1975)

“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.”

Help us translate this quote

Robert T. Bakker libro The Dinosaur Heresies

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

“The dinosaur is for most people the epitome of extinctness, the proto­type of an animal so maladapted to a changing environment that it dies out, leaving fossils but no descendants.”

Help us translate this quote

Robert T. Bakker

"Dinosaur Renaissance", Scientific American 232, no. 4 (April 1975), 58—78
Dinosaur Renaissance (1975)

Autori simili

Pierre Teilhard De Chardin photo
Pierre Teilhard De Chardin9
gesuita, filosofo e paleontologo francese None
Steven Weinberg photo
Steven Weinberg6
fisico statunitense None
Les Brown photo
Les Brown1
politico statunitense None
Allen Ginsberg photo
Allen Ginsberg9
poeta statunitense None
Robert Lee Frost photo
Robert Lee Frost16
poeta statunitense None
William Saroyan photo
William Saroyan10
scrittore statunitense None
Toni Morrison photo
Toni Morrison27
scrittrice statunitense None
Zig Ziglar photo
Zig Ziglar4
scrittore statunitense None
Charles M. Schulz photo
Charles M. Schulz113
fumettista statunitense None
Sinclair Lewis photo
Sinclair Lewis7
romanziere e drammaturgo statunitense None