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The growth in interest in dinosaurs since the Dinosaur Renaissance has been accompanied by depictions made by artists working with ideas at the forefront of dinosaur science, presenting lively dinosaurs and feathered dinosaurs as these concepts were first being considered. Cultural depictions of dinosaurs have been an important means of ...
Erickson has shown that after a long time as juveniles, tyrannosaurs underwent tremendous growth spurts for about four years midway through their lives. After the rapid growth phase ended with sexual maturity, growth slowed down considerably in adult animals. A tyrannosaurid growth curve is S-shaped, with the maximum growth rate of individuals ...
Aardonyx compared to a human in size. The genus is known from disarticulated bones belonging to two immature individuals. The material consists of cranial elements, vertebrae, dorsal and cervical ribs, gastralia, chevrons, elements of the pectoral and pelvic girdles, and bones of the fore and hind limbs, manus, and pes.
The fossils show that the dinosaurs had a diversity of tufted hair-like "proto-feathers," which would have been used for insulation. The fossils also showed body and wing feathers that would have ...
[14] [18] Based on fossils of the related Ornithomimus, it is known that ornithomimosaurs ("ostrich dinosaurs") were feathered, and that the adults bore wing-like structures as evidenced by the presence of quill-knobs on the ulna bone of the lower arm, bumps that indicate where feathers would have attached. [20]
One of the traits that helped make the dinosaurs such an evolutionary success story - thriving for 165 million years - was their fast growth rate, from massive meat-eaters like Tyrannosaurus to ...
These Victorians were “the first generations to confront the reality of dinosaurs,” writes Dolnick. And they responded with the same fascination and dread of any 6-year-old kid today.
Sauropodomorphs reached the age of sexual maturity well before they were fully-grown adults. [ 22 ] [ 23 ] A study by Griebeler et al. (2013) concluded that the maximum growth rates of sauropodomorphs were comparable to those of precocial birds and the black rhinoceros but lower than the growth rates of average mammals.