History ScienceMarchesOn / WalkingWithDinosaurs

17th Jun '17 8:32:57 AM Spinosegnosaurus77
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* Just after they finished the ''Gorgosaurus'' models, ''Yutyrannus'' (a feathered tyrannosaur) was found.

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* Just after they finished the ''Gorgosaurus'' models, ''Yutyrannus'' (a feathered tyrannosaur) was found.found, although the possibility of tyrannosaurids proper being unfeathered was revived in 2017.
12th May '17 2:34:13 PM Naram-Sin
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* The "dwarf allosaur" seen in this episode may or may not be the theropod now known as ''Australovenator''. It actually wasn't an exact scaled-down version of the North American ''Allosaurus''. It was the size it was depicted and had longer arms with devastating claws.
** If the dwarf allosaur was indeed ''Australovenator'' then it may not be an allosaur at all, as some evidence suggests megaraptorans (the group of which ''Australovenator'' belongs) are coelurosaurs, even ''tyrannosaurs''.

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* The "dwarf allosaur" seen in this episode may or may was inspired by a single ankle bone found in the 1980s, which was ''tentatively'' attributed to ''Allosaurus'' for lack of a better genus to place it in. The researchers were not be particularly convinced themselves that it was ''Allosaurus'', what with being smaller, from the theropod now known as ''Australovenator''. It actually wasn't early Cretaceous rather than the late Jurassic and from Australia rather than North America; let alone, that it was [[PropRecycling an exact scaled-down version replica]] of the North American ''Allosaurus''. It was dinosaur as the show portrayed it. An Australian theropod dinosaur that actually matches the ankle bone in size it and age, ''Australovenator'', was depicted and described in 2009. It also had longer arms than ''Allosaurus'', with devastating claws.
** If the dwarf allosaur "dwarf allosaur" was indeed ''Australovenator'' then it may not be an allosaur allosaurid at all, as some evidence suggests megaraptorans (the group of which ''Australovenator'' belongs) belongs to) are coelurosaurs, even ''tyrannosaurs''.
which also include ''Tyrannosaurs''.



* The ''Deinotherium'' model subscribes to the theory that deinotheres had shorter trunks than elephants. This was based on the fact that deinotheres separate early from the proboscidean family tree, and that their skulls lack the attachment marks corresponding to some trunk muscles, which were interpreted as deinotheres lacking these muscles, and as a result having shorter and more primitive trunks. It has been later found that ''elephants'' don't have these marks either, because the muscles attach to other muscles in the trunk rather than the skull. If deinotheres didn't have them, it could be because they had long, advanced, elephant-like trunks, rather than the opposite. Finally, authors of the later study appealed to common sense: while deinothere necks are slightly longer than elephant's, their legs are also longer, and they are not better at kneeling than elephant legs are. This means that if deinotheres [[http://img4.wikia.nocookie.net/__cb20111003161259/dinosaurs/images/5/5c/Deinotherium.jpg had trunks as short as proposed]], the animals would be almost unable to drink.


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* The ''Deinotherium'' model subscribes to follows the theory that deinotheres had shorter trunks than elephants. This was based on the fact that deinotheres separate separated early from the proboscidean family tree, and that their skulls lack the attachment marks corresponding to some trunk muscles, which were interpreted as deinotheres lacking these muscles, and as a result having shorter and more primitive trunks. It has been was later found that ''elephants'' don't have these marks either, because the muscles attach to other muscles in the trunk rather than the skull. If deinotheres didn't have them, it could be because they had long, advanced, elephant-like trunks, rather than the opposite. Finally, the authors of the later study appealed to common sense: while deinothere necks are slightly longer than elephant's, their legs are also longer, and they are not better at kneeling than elephant legs are. This means that if deinotheres [[http://img4.wikia.nocookie.net/__cb20111003161259/dinosaurs/images/5/5c/Deinotherium.jpg had trunks as short as proposed]], depicted in the show]], the animals would be almost unable to drink.

incapable of drinking without getting partially submerged in water.
7th Jan '17 4:49:49 PM Spinosegnosaurus77
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** Furthermore, the North American ''Brachiousaurus'' has been relegated to another genus. The Brachiosaur genus still exists, but the one seen in this show is now called ''Giraffotitan''.
7th Jan '17 3:43:43 PM whunt
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Added DiffLines:

** Furthermore, the North American ''Brachiousaurus'' has been relegated to another genus. The Brachiosaur genus still exists, but the one seen in this show is now called ''Giraffotitan''.
10th Dec '16 6:48:11 AM Spinosegnosaurus77
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* Most [[StockDinosaursTrueDinosaurs coelurosaurs]] certainly had feathers. The several [[StockDinosaursTrueDinosaurs dromaeosaurid species]] surely had them, but in the franchise they are all shown featherless, see further): this, rather than ScienceMarchesOn, might be interpreted more as RuleOfCool, or rather, ArtisticLicensePaleontology, since feathered raptors would have appeared "too cute"? In RealLife dromeosaurids had WINGS just like their famous relative, the "ur-bird" ''[[StockDinosaursTrueDinosaurs Archaeopteryx]]''...
** This might be nothing compared to what is seeming to come: ''most small-sized dinosaurs'' may well have had some sort of covering. This is a very recent theory led by the discover of the primitive herbivore ''[[UsefulNotes/PrehistoricLife Tianyulong]]'' in China: the theory is that some kind of covering was present in the last common ancestor of ''all'' dinosaurs and pterosaurs, and then it was partially lost by its largest descendants, possibly because of the [[http://en.wikipedia.org/wiki/Surface-area-to-volume_ratio#Biology surface area to volume ratio]]. Some think the "spikes" on ''[[StockDinosaursTrueDinosaurs Diplodocus]]'' have the same common origin of feathers, as well as the quill of the small herbivore ''[[UsefulNotes/PrehistoricLifeHadrosaurPredecessors Psittacosaurus]]'' and even the horny bumps lined on the back of several [[StockDinosaursTrueDinosaurs hadrosaur mummies]]. See UsefulNotes/{{Dinosaurs}} for more infos about that. Whatever the case, the old "gigantic lizards" seem to have their days numbered now.

to:

* Most [[StockDinosaursTrueDinosaurs coelurosaurs]] certainly had feathers. The several [[StockDinosaursTrueDinosaurs dromaeosaurid species]] surely had them, but in the franchise they are all shown featherless, see further): this, rather than ScienceMarchesOn, might be interpreted more as RuleOfCool, or rather, ArtisticLicensePaleontology, since feathered raptors would have appeared "too cute"? In RealLife dromeosaurids had WINGS just like their famous relative, the "ur-bird" ''[[StockDinosaursTrueDinosaurs Archaeopteryx]]''...
**
Archaeopteryx]]'' This might be nothing compared to what is seeming to come: ''most small-sized dinosaurs'' may well have had some sort of covering. This is a very recent theory led by the discover of the primitive herbivore ''[[UsefulNotes/PrehistoricLife Tianyulong]]'' in China: the theory is that some kind of covering was present in the last common ancestor of ''all'' dinosaurs and pterosaurs, and then it was partially lost by its largest descendants, possibly because of the [[http://en.wikipedia.org/wiki/Surface-area-to-volume_ratio#Biology surface area to volume ratio]]. Some think the "spikes" on ''[[StockDinosaursTrueDinosaurs Diplodocus]]'' have the same common origin of feathers, as well as the quill of the small herbivore ''[[UsefulNotes/PrehistoricLifeHadrosaurPredecessors Psittacosaurus]]'' and even the horny bumps lined on the back of several [[StockDinosaursTrueDinosaurs hadrosaur mummies]]. See UsefulNotes/{{Dinosaurs}} for more infos about that. Whatever the case, the old "gigantic lizards" seem to have their days numbered now.
10th Dec '16 1:55:56 AM Michal
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* ''[[UsefulNotes/PrehistoricLifeMammals Andrewsarchus]]'', known only from the skull and a few fragments of bone, was assumed at the time the series was produced to be closely related to [[UsefulNotes/PrehistoricLifeMammals mesonychids]], and modeled after them. However, [[http://scienceblogs.com/tetrapodzoology/2009/08/mesonychians_part_iii_andrewsa.php later]] [[http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0007062 phylogenetic studies]] indicate that it might have actually been a close relative of [[UsefulNotes/PrehistoricLifeMammals entelodonts]].

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* ''[[UsefulNotes/PrehistoricLifeMammals Andrewsarchus]]'', known only from the skull and a few fragments of bone, was assumed at the time the series was produced to be closely related to [[UsefulNotes/PrehistoricLifeMammals mesonychids]], and modeled after them. However, [[http://scienceblogs.com/tetrapodzoology/2009/08/mesonychians_part_iii_andrewsa.php com/tetrapodzoology/2009/08/13/mesonychians-part-iii-andrewsa/ later]] [[http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0007062 phylogenetic studies]] indicate that it might have actually been a close relative of [[UsefulNotes/PrehistoricLifeMammals entelodonts]].
9th Dec '16 6:11:17 PM CurledUpWithDakka
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** This might be nothing compared to what is seeming to come: ''most small-sized dinosaurs'' may well have had some sort of covering. This is a very recent theory led by the discover of the primitive herbivore ''[[UsefulNotes/PrehistoricLife Tianyulong]]'' in China: the theory is that some kind of covering was present in the last common ancestor of ''all'' dinosaurs and pterosaurs, and then it was partially lost by its largest descenants, possibly because of the [[http://en.wikipedia.org/wiki/Surface-area-to-volume_ratio#Biology surface area to volume ratio]]. Some think the "spikes" on ''[[StockDinosaursTrueDinosaurs Diplodocus]]'' have the same common origin of feathers, as well as the quill of the small herbivore ''[[UsefulNotes/PrehistoricLifeHadrosaurPredecessors Psittacosaurus]]'' and even the horny bumps lined on the back of several [[StockDinosaursTrueDinosaurs hadrosaur mummies]]. See UsefulNotes/{{Dinosaurs}} for more infos about that. Whatever the case, the old "gigantic lizards" seem to have their days numbered now.

to:

** This might be nothing compared to what is seeming to come: ''most small-sized dinosaurs'' may well have had some sort of covering. This is a very recent theory led by the discover of the primitive herbivore ''[[UsefulNotes/PrehistoricLife Tianyulong]]'' in China: the theory is that some kind of covering was present in the last common ancestor of ''all'' dinosaurs and pterosaurs, and then it was partially lost by its largest descenants, descendants, possibly because of the [[http://en.wikipedia.org/wiki/Surface-area-to-volume_ratio#Biology surface area to volume ratio]]. Some think the "spikes" on ''[[StockDinosaursTrueDinosaurs Diplodocus]]'' have the same common origin of feathers, as well as the quill of the small herbivore ''[[UsefulNotes/PrehistoricLifeHadrosaurPredecessors Psittacosaurus]]'' and even the horny bumps lined on the back of several [[StockDinosaursTrueDinosaurs hadrosaur mummies]]. See UsefulNotes/{{Dinosaurs}} for more infos about that. Whatever the case, the old "gigantic lizards" seem to have their days numbered now.
6th Dec '16 7:44:42 PM ElSquibbonator
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* This special portrayed the largest land animal of all time, ''[[StockDinosaursTrueDinosaurs Argentinosaurus]]'', being hunted by the largest land predator, ''[[StockDinosaursTrueDinosaurs Giganotosaurus]]''. Both have been supplanted since then: New evidence found that ''[[StockDinosaursTrueDinosaurs Spinosaurus]]'' was the biggest land predator, while ''Argentinosaurus'' has been surpassed slightly in length by 2006-described ''Turiasaurus'' (''Argentinosaurus'' is still heavier, though).[[note]]Even before ''Argentinosaurus'' was described its estimated size and weight was surpassed by those attributed to ''Amphicoelias'' and ''Bruhathkayosaurus''. However, the record size of ''Amphicoelias'' was based on a single partial vertebra that was lost shortly after it was described by Cope in 1878, and the estimated dimensions of ''Bruhathkayosaurus'' were never peer-reviewed and published (and since the type fossil was later lost in a moonsoon flood, no further study can be made on it). The accuracy of both original descriptions has been questioned.[[/note]]
* Subsequent stratigraphic studies have shown that ''Giganotosaurus'' did not live at the same time as ''Argentinosaurus'', although a close relative, ''Mapusaurus'', did.

to:

* This special portrayed the largest land animal of all time, ''[[StockDinosaursTrueDinosaurs Argentinosaurus]]'', being hunted by the largest land predator, ''[[StockDinosaursTrueDinosaurs Giganotosaurus]]''. Both have been supplanted since then: New evidence found that ''[[StockDinosaursTrueDinosaurs Spinosaurus]]'' was the biggest land predator, predator (though it was partially aquatic), while ''Argentinosaurus'' has been surpassed slightly in length by 2006-described ''Turiasaurus'' (''Argentinosaurus'' is still heavier, though).[[note]]Even before ''Argentinosaurus'' was described its estimated size and weight was surpassed by those attributed to ''Amphicoelias'' and ''Bruhathkayosaurus''. However, the record size of ''Amphicoelias'' was based on a single partial vertebra that was lost shortly after it was described by Cope in 1878, and the estimated dimensions of ''Bruhathkayosaurus'' were never peer-reviewed and published (and since the type fossil was later lost in a moonsoon flood, no further study can be made on it). The accuracy of both original descriptions has been questioned.[[/note]]
* Subsequent stratigraphic studies have shown that ''Giganotosaurus'' did not live at quite the same time as ''Argentinosaurus'', although a close relative, ''Mapusaurus'', did.did. That said, they did still live close enough together in time that some overlap could still be possible.



* The show was made in 2003, and as a result missed out on the discovery of ''[[http://en.wikipedia.org/wiki/Livyatan_melvillei Livyatan melvillei]]''. Its fossil was discovered in the same area as the ''C. megalodon'' episode, and had they set it just a bit earlier, both of these monsters would have appeared. Also of note is the fact that period had even more marine carnivores than the Cretaceous.

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* The show was made in 2003, and as a result missed out on the discovery of ''[[http://en.wikipedia.org/wiki/Livyatan_melvillei Livyatan melvillei]]''. Its fossil was discovered in the same area as the ''C. megalodon'' episode, and had they set it just a bit earlier, both of these monsters would have appeared. Also of note is the fact that period had even more large marine carnivores than the Cretaceous.
23rd Nov '16 9:27:43 AM CJCroen1393
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** Additionally, pterosaurs were probably ''not'' "on the decline" at the end of the Cretaceous. Indeed, Azhdarchids like ''Quetzalcoatlus'' were among the most successful animals at the time.

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** Additionally, pterosaurs were probably ''not'' "on the decline" at the end of the Cretaceous. Indeed, Azhdarchids like ''Quetzalcoatlus'' were among the most successful animals at the time. And in 2016, it was discovered that there were other pterosaurs aside from azhdarchids likely made it to the end of the Cretaceous (pteranodontids and nyctosaurids specifically) and that not all late Cretaceous pterosaurs were giants (an as of late unnamed azhdarchid was discovered from this time, and it was only the size of a cat).
2nd Sep '16 8:41:27 PM schoi30
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* Evidence suggests that ''Stegosaurus'' lived in herds and would have preferred the open savanna regions of the Morrison formation to the more forested areas.

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* Evidence suggests that ''Stegosaurus'' lived in herds and would have preferred the open savanna regions of the Morrison formation to the more forested areas.
areas. Also, [[http://scienceblogs.com/tetrapodzoology/2011/01/10/stegosaur-skin-plates-sex/ a study on stegosaur skin impression]] suggests the plates were covered in horn rather than skin, making the scene where the ''Stegosaurus'' reddens its plates by flushing blood into them unlikely.
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http://tvtropes.org/pmwiki/article_history.php?article=ScienceMarchesOn.WalkingWithDinosaurs