Background Allosauroidea has a contentious taxonomic and systematic history. Within this group of theropod dinosaurs, considerable debate has surrounded the phylogenetic position of the large-bodied allosauroid Acrocanthosaurus atokensis from the Lower Cretaceous Antlers Formation of North America. Several prior analyses recover Acrocanthosaurus atokensis as sister taxon to the smaller-bodied Allosaurus fragilis known from North America and Europe, and others nest Acrocanthosaurus atokensis within Carcharodontosauridae, a large-bodied group of allosauroids that attained a cosmopolitan distribution during the Early Cretaceous. Methodology/Principal Findings Re-evaluation of a well-preserved skull of Acrocanthosaurus atokensis (NCSM 14345) provides new information regarding the palatal complex and inner surfaces of the skull and mandible. Previously inaccessible internal views and articular surfaces of nearly every element of the skull are described. Twenty-four new morphological characters are
Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 231 million years ago, although the exact origin and timing of the evolution of dinosaurs is the subject of active research. They became the dominant terrestrial vertebrates after the Triassic-Jurassic extinction event 201 million years ago; their dominance continued through the Jurassic and Cretaceous periods. The fossil record indicates that birds are modern feathered dinosaurs, having evolved from earlier theropods during the late Jurassic Period. As such, birds were the only dinosaur lineage to survive the Cretaceous-Paleogene extinction event 66 million years ago. Dinosaurs can therefore be divided into avian dinosaurs, or birds; and non-avian dinosaurs, which are all dinosaurs other than birds. This article deals primarily with non-avian dinosaurs. Dinosaurs are a varied group of animals from taxonomic, morphological and ecological standpoints. Birds, at over ...
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Background Basal sauropodomorphs, or prosauropods, are a globally widespread paraphyletic assemblage of terrestrial herbivorous dinosaurs from the Late Triassic and Early Jurassic. In contrast to several other landmasses, the North American record of sauropodomorphs during this time interval remains sparse, limited to Early Jurassic occurrences of a single well-known taxon from eastern North America and several fragmentary specimens from western North America. Methodology/Principal Findings On the basis of a partial skeleton, we describe here a new basal sauropodomorph dinosaur from the Lower Jurassic Navajo Sandstone of southern Utah, Seitaad ruessi gen. et sp. nov. The partially articulated skeleton of Seitaad was likely buried post-mortem in the base of a collapsed dune foreset. The new taxon is characterized by a plate-like medial process of the scapula, a prominent proximal expansion of the deltopectoral crest of the humerus, a strongly inclined distal articular surface of the radius, and a
Dinosaurs (meaning "terrible lizards")[1] are a varied group of Archosaur reptiles. They were the dominant land animals of the Mesozoic era. Over 500 different genera of dinosaurs are known.[2] Fossils of dinosaurs have been found on every continent, and there are still frequent new discoveries. Dinosaurs appeared in the Upper Triassic, about 230 million years ago.[3] The earliest date of a dinosaur fossil is that of Eoraptor and Herrerasaurus from the Argentine, and Saturnalia from Brazil, 237 to 228 mya.[4] By the early Jurassic they were the top land vertebrates, and dominated most environments on land. They continued until the sudden K/T extinction event 66 million years ago.[5] From the fossil record, we know that birds are living feathered dinosaurs.[6] They evolved from the earliest theropods during the Jurassic.[7] They were the only line of dinosaurs to survive to the present day.[8] Dinosaurs had adaptations which helped make them successful. The first known dinosaurs were small ...
Dinosaurs of the Late Triassic Dinosaurs are a rare but important portion of the fossil fauna of Petrified Forest National Park. Park sediments preserve fossils of the Late Triassic dawn of the dinosaurs when these animals first appeared worldwide. In contrast to the large sauropods, horned dinosaurs, and the famed Tyrannosaurus rex of the later Jurassic and Cretaceous periods, the Triassic dinosaurs of Arizona were mainly small, bipedal carnivores no bigger than a human in size. Unlike their descendents which filled every terrestrial ecological niche, the dinosaurs of the Triassic shared the landscape with other types of predatory reptiles, most notably the crocodile-like phytosaurs and rauisuchians. In direct competition with these other voracious predators, the small dinosaurs evolved characteristics that would allow them to compete for prey. These evolutionary developments included characters of the pelvis and ankle which allowed the animals to keep their legs straight under their body for a ...
Qijiang, China - Researchers from the University of Alberta have concluded that the fossil remains accidentally dug up in 2006 by local farmers seeking a prime fishing spot are that of a new dinosaur that measured up to 15 meters (~50 ft.) in length. The dinosaur belongs to the mamenchisaurids which were noted for having very elongated necks. The type of long-neck dinosaurs most people think of are called sauropods. These land dwellers were popularized in the Don Bluth animated films "The Land Before Time". However, their necks comprised 33% of their body length. Mamenchisaurids have necks significantly longer than that.. The newly discovered dinosaur has been given the nick name "dragon dinosaur". It stems from the fact that when originally discovered, locals could not see any legs on it. This gave it the appearance of being a mythical dragon.. The dinosaur is also called "Qijianglong" to attribute its name to the city where it was first discovered. By comparison with other long-neck dinosaurs, ...
Complete colletion of dinosaur fossil replicas including dinosaur claws, Dinosaur castings, dinosaurs claws, dinosaur teeth, dinosaur replicas, dinosaur models, resin castings, dinosaur tooth
Complete colletion of dinosaur fossil replicas including dinosaur claws, Dinosaur castings, dinosaurs claws, dinosaur teeth, dinosaur replicas, dinosaur models, resin castings, dinosaur tooth
Jason Poole, who oversees the lab and has participated in dinosaur digs around the world, says the fossils were unearthed in Wyoming in 2011 by a team from the New Jersey State Museum in Trenton. Scientists already know the fossils belong to a 25-foot-long, duck-billed, plant-eating dinosaur that lived 67 to 70 million years ago. Its of the hadrosaur family, the same family as the famous Hadrosaurus foulkii, the worlds first nearly complete dinosaur, which the Academy displayed in 1868 as the worlds first mounted dinosaur.. But scientists wont know what species of hadrosaur the mystery dinosaur is until they can fully see and examine the fossils. Even though they have found only a small portion of the dinosaur, scientists are confident they will be able to identify it, especially since they have parts of the skull, which often is not recovered.. "From neck to tail, all hadrosaurids look alike," Poole says. "But we have a good bit of the skull, which makes it a lot easier to identify the ...
Witmer said traditional views of the nostril placement are probably rooted in a historical belief that the huge, long-necked sauropod dinosaurs were amphibious. In that case, nasal passages positioned further back on the head would have worked like a snorkel. Evidence uncovered in the 1970s suggested that sauropods were not aquatic, but landlubbers. Yet for some reason, the early depictions of sauropods with nostrils further back on the head didnt change, and that position was also picked up in renderings of other dinosaurs. Up-Front Results Witmer undertook the study because he is interested in the overall physiology of dinosaurs. He was curious about why the fleshy nostrils of dinosaurs were shown where they are, but he couldnt find an explanation. So he set out to get a more accurate idea of just where a dinosaurs nose was probably positioned. He did X-ray examinations of living birds, crocodiles, and lizards, which are thought to be surviving relatives of dinosaurs.. He painted the fleshy ...
The oldest dinosaurs were bipedal and fast creatures, which had many competitors in the ecosystems of Pangea. In the Middle Triassic we already find species able to be classified into Saurischia (Herrerasaurus, Eoraptor) or Ornithischia (Pisanosaurus). The findings started at the end of the 20th century in the argentinian province called Ischigualasto, where Herrerasaurus ischigualastensis and Eoraptor lunensis was found. While Herrerasauridae was thought to be a sister taxon to Neotheropoda, Eoraptor became famous for its position as the most basal theropod dinosaur. The apomorphies linking the skeleton of these dinosaurs to theropods are numerous, for example wide intercentres of vertebrae, elongated humerus and manus, flat fourth metacarpal or the craniomandibular and intramandibular joint at the same level as the teeth rows. Later more discoveries of basal dinosaurs happened, which led to the creation of new hypotheses about the very early phylogeny of this group. Saturnalia tupiniquim was ...
Palaeontologists identify what is likely to be the oldest known dinosaur specimen, patching a 10-15-million-year hole in dinosaurs evolutionary history.
It walked on two legs, measured 2-3m in length with a large tail and weighed between 20 and 60kg. The find suggests that many millions of years passed between dinosaurs first members and their dominance on land.

It fills a gap between what we previously knew to be the oldest dinosaurs and their other closest relatives, report co-author Paul Barrett, of the Natural History Museum in London, told BBC News. The find shores up the idea that dinosaurs evolved on the southern parts of the supercontinent Pangaea. There was this big gap in the fossil record where dinosaurs shouldve been present and this fossil neatly fills that gap. The early evolution of dinosaurs is difficult to unpick, as a rich variety of reptiles were proliferating at the time - and some may even have independently evolved characteristics that are associated with
The year is 2020. You have pursued various careers in science, business, medicine, etc., in the 20 or so years since you graduated from Fullam University. Because of your knowledge about evolution and the dinosaur fossil record, youve been asked to participate in a landmark case that will decide if dinosaurs should be cloned from ancient DNA. Experts with various backgrounds and interests are being assembled to aid in the decision-making process. You and your colleagues will be deciding if extinct species should be brought back to life. You dont have long to decide either--new cloning techniques are being tested around the world and the possibility of resurrecting extinct species may soon be within our grasp. Karelis Securities has offered to sponsor your participation, so you and other Fullam alums have been brought together for a debriefing of the situation ...
Could God have created dinosaurs? Biochemist Brian Thomas was taught that dinosaurs evolved over millions of years via natural processes and death. Which dinosaur origin model is true? What do the fossils reveal?. Other episodes in this series:. Are Human Fossils Buried with Dinosaur Fossils?. Are Dinosaurs in the Bible?. Did Dinosaurs Evolve into Birds?. Is there Evidence that Dinosaurs Lived Recently?. ...
Picture Credit: Everything Dinosaur. Not only does this discovery make it a record breaking year for Utah, in terms of new dinosaurs but it adds greatly to our understanding of the Troodontidae. Troodonts are known from the Upper Cretaceous of Asia and from the Upper Jurassic and Upper Cretaceous of North America, however, this is the first evidence of Troodonts living in what was to become North America in the Early Cretaceous.. Commenting on the new dinosaur, Scott Foss, a regional palaeontologist for the US Bureau of Land Management stated:. "Its skull is six times larger than other dinosaurs. One find a year is unusual but eight is outstanding.". He went on to add that approximately one percent of all known dinosaurs described to date have had their fossils found in Utah. We at Everything Dinosaur, think this claim is a little exaggerated, but the importance of the western United States as a location for Mesozoic vertebrate fossils should not be underestimated.. Seven of the new types of ...
Whatever the ancestor of birds was, it must have had five fingers, not the three-fingered hand of theropod dinosaurs," Feduccia said. "Scientists agree that dinosaurs developed hands with digits one, two and three -- which are the same as the thumb, index and middle fingers of humans -- because digits four and five remain as vestiges or tiny bumps on early dinosaur skeletons. Apparently many dinosaurs developed very specialized, almost unique hands for grasping and raking. "Our studies of ostrich embryos, however, showed conclusively that in birds, only digits two, three and four, which correspond to the human index, middle and ring fingers, develop, and we have pictures to prove it," said Feduccia, professor and former chair of biology at UNC. "This creates a new problem for those who insist that dinosaurs were ancestors of modern birds. How can a bird hand, for example, with digits two, three and four evolve from a dinosaur hand that has only digits one, two and three? That would be almost ...
Because feathers are often associated with birds, feathered dinosaurs are often touted regarding the relationship between birds and dinosaurs. However, the multiple skeletal features also shared by the two groups represent the more important link for paleontologists. Furthermore, it is increasingly clear that the relationship between birds and dinosaurs, and the evolution of flight, are more complex topics than previously realized. For example, while it was once believed that birds evolved from dinosaurs in one linear progression, some scientists, most notably Gregory S. Paul, conclude that dinosaurs such as the dromaeosaurs may have evolved from birds, losing the power of flight while keeping their feathers in a manner similar to the modern ostrich and other ratites.. Comparison of bird and dinosaur skeletons, as well as cladistic analysis, strengthens the case for the link, particularly for a branch of theropods called maniraptors. Skeletal similarities include the neck, pubis, wrist ...
Dinosaur questions and answers- Early Jan. 2001. Zoom Dinosaurs is all about dinosaurs, dinosaur evolution, fossils, dinosaur extinction, dinosaur eggs, trackways.
Dinosaur questions and answers- Late March 2001. Zoom Dinosaurs is all about dinosaurs, dinosaur evolution, fossils, dinosaur extinction, dinosaur eggs, trackways.
Pterosaurs and dinosaurs are closely related, meaning they share a number of features, but are still distinct groups, or clades as we call them in biology. They both belong to a group called the Archosauria, which includes crocodilians, dinosaurs (including birds, as they evolved from dinosaurs and therefore are dinosaurs by definition), and pterosaurs. Archosaurs share a number of characteristics including an antorbital fenestra (a hole in the skull in front of the eye) and teeth set in sockets. However, early in archosaurian evolution there was a split between crocodilians and their close relatives (the crurotarsans or pseudosuchians) and birds and their closest relatives, including dinosaurs and pterosaurs (known as the avemetatarsalians). Avemetatarsalia is a mouthful, but its pretty easy to break down. Basically this group is united by a bird-like ankle, among other features. Within this group is another group called the Ornithodira, which means bird-neck, again uniting the group with ...
FIG. 5. - Restoration Of Allosaurus.. Materials for the Restoration of D inosaurs. - Carnivorous dinosaur Allosaurus o f the U mal closely related to the Me alosaurus (Allosaurus) pper Jurassic period of North America, an anit type of England. The skeleton (fig. 4) was found nearly complete in the beds of the Morrison formation, Upper Jurassic of central Wyoming, U.S.A. Near it was discovered the posterior portion of the skeleton of a giant herbivorous dinosaur (Brontosaurus Marsh). It was observed that ten of the caudal vertebrae of the latter skeleton bore tooth marks and grooves corresponding exactly with the sharp pointed teeth in the jaw of the carnivorous dinosaur. This proved that the great herbivorous dinosaur had been preyed upon by its smaller carnivorous contemporary. Teeth of the carnivorous dinosaur scattered among the bones of the herbivorous dinosaur completed the line of circumstantial evidence. Upon this testimony the restoration (fig. 5) of the Megalosaur has been drawn by ...
Details from amazon in [US] [UK] [France] [Germany] ``This book is for the ``kid in all of us. The book, published in conjunction with the release of Jurassic Park III is intended for children ages 8 and up. The book, however, can be used by anyone interested in dinosaurs. The book is fascinating because it does not talk down to kids. The authors describe the earths time scale, especially the Mesozoic Era. There is a section on how dinosaurs are classified, using cladistic principles with note in the test advising the readers that new discoveries may alter the diagram (cladogram). Also included in the book is a section on finding dinosaurs, and how they are prepared in a museum. There is also a section by the books illustrator, Robert Walters on how he illustrates dinosaurs. At the end of the book are sections on where to see dinosaurs in museums and in the field, a bibliography for kids and adults, a listing of dinosaur web sites and a glossary for anyone to look up those big words. The ...
Daves Rock Shop offers museum quality dinosaur fossils, including Allosaurus,Tyrannosaurus rex, Triceratops, Raptor, Segnosaurus, dinosaur eggs, Hadrosaur, Dinosaur bones, spinosaurus, dinosaur tracks and footprints, and other museum quality dinosaur fossils specimens.
In the new episode of Jurassic Park the dinosaur theme park on Isla Nuba is in operation already for a long time, but it has financial problems. The scientists want to produce more "thrill" by developing a genetically modified pimped predatory dinosaur to attract more paying visitors.. But what has actually made dinosaurs so successful that they could dominate the earth for 200 million of years? And why did mammals have to wait 200 millions of years for their turn? Mammals were already present before dinosaurs had inhabited the earth, namely in that time of the so-called perm period. They evolved - like the dinosaurs did as well - from reptiles and were biologically seen quite similar to the todays platypus - so they had fur, warm-blooded body temperature and probably they even laid eggs. Suddenly all of the mammals apart from a few small forms died out and made way for the dinosaurs.. What happened? The atmosphere got contaminated due to eruptions of huge volcanos, the level of oxygen dropped ...
A dinosaur couple that appears to have died together after wooing each other has been identified in remains unearthed at the Gobi Desert in Mongolia.. The dino couple, named Romeo and Juliet since they are reminiscent of Shakespeares famous doomed lovers, were entombed together for over 75 million years, according to a new study in the journal Scientific Reports.. Key to the research was figuring out the sex of the dinosaurs.. "Determining a dinosaurs gender is really hard," lead author Scott Persons said in a press release. "Because soft anatomy seldom fossilizes, a dinosaur fossil usually provides no direct evidence of whether it was a male or a female.". Persons, a paleontologist at the University of Alberta, and his team compared the remains of the bird-like dinosaurs, which were oviraptors (avian-resembling two-legged predators), with the anatomy of modern birds.. The researchers found evidence that the dinosaurs sported long feathers on the ends of their tails. The feathers were not ...
Tyrannosaurus ( or , meaning tyrant lizard) from the Greek words τυράννος (tyrannos, meaning "tyrant") and σαύρος (sauros, meaning "lizard"), is a genus of theropod dinosaur. The species Tyrannosaurus rex (rex meaning king in Latin), commonly abbreviated to T. rex, is a fixture in popular culture. It lived throughout what is now western North America, with a much wider range than other tyrannosaurids. Fossils are found in a variety of rock formations dating to the last two million years of the Cretaceous Period, 67 to 65.5 million years ago. It was among the last non-avian dinosaurs to exist prior to the Cretaceous-Tertiary extinction event.. Like other tyrannosaurids, Tyrannosaurus was a biped carnivore with a massive skull balanced by a long, heavy tail. Relative to the large and powerful hindlimbs, Tyrannosaurus forelimbs were small, though unusually powerful for their size, and bore two clawed digits. Although other theropods rivaled or exceeded Tyrannosaurus rex in ...
are a creationist, in which case they (because clearly birds are not dinosaurs) died a few thousand years ago in the global flood because Noah didnt have room for them in the ark. An eminent Christian, Jack Chick, propounds an alternative theory:[2] some dinosaurs were in Noahs ark, and hence were saved. Unfortunately, in the flood many plants were killed. As a consequence, the atmosphere after the flood was poor in oxygen. Big animals, such as dinosaurs, need lots of oxygen! Luckily, some dinosaurs survived even this - ever heard of dragons? This does not make any sense considering that the average dinosaur was about the size of a van. Why would larger modern animals, such as elephants, survive but not the smaller dinosaurs? Simple: that hypothesis is wrong. Another popular idea is that Satan put all the fossils in the ground to trick humans into believing evolution, or perhaps God put them there to test humanitys faith. A similar idea was that the fossils were faked by scientists. These ...
sauropods with dermal spines were depicted in the Ica stone collection. Modern man was unaware that some (many?) sauropod dinosaurs possessed dermal spines, even though scientists had been studying the dinosaur fossils around the world for more than 150 years. This characteristic of sauropods was not learned from the fossil record until 1992. The ancient Peruvians had it right long before 1992: are we to believe they carefully examined, excavated, and reconstructed fossilized sauropod bones and skin-intricate scientific recreations that history simply does not record the ancients performing? Is it not more reasonable to conclude that man once lived with the animals that they illustrated? Modern-day paleontologists have the luxury of researching dinosaur data from all over the world and as far back as the 1820s. Our present knowledge and illustrations of dinosaurs come from their composite research. The ancients had no such comparable science, yet they still depicted dinosaurs accurately. The ...
Finally we now turn our attention to the featured paper. The Jesper Milàn and colleagues report on a new, better preserved Navahopus trackway (skipping over the theropod tracks entirely). Suprisingly (to me in any case) it more or less confirms Bairds earlier interpretation of Navahopus. In particular the manus prints are much clearer and lo and behold there is a large medially directed thumb-claw. Sauropodomorphs are the only known four-toed tetrapods from that epoch with hyperenlarged thumb claws so I think we have to accept that Navahopus was indeed the spoor of a sauropodomorph. So what is Otozoum, and were basal sauropodomorph facultative quadrupeds after all? I think a plausible explanation is that we are dealing with two distinct kinds of basal sauropodomorph. Otozoum tracks were likely left by plateosaurian-grade basal sauropodomorphs (like Plateosaurus and Massospondylus), which probably were obligate bipeds (at least as adults). Navahopus, on the other hand was probably left by a ...
New science directly challenges the millions-of-years dogma scattered throughout the blockbuster movie Jurassic World. The spring 2015 edition of the Creation Research Society Quarterly (CRSQ) is a special issue that focuses on the investigation of dinosaur proteins inside fossil bones. The last article in the issue presents never-before-seen carbon dates for 14 different fossils, including dinosaurs. Because radiocarbon decays relatively quickly, fossils that are even 100,000 years old should have virtually no radiocarbon left in them.1 But they do.. Jurassic World characters repeatedly mention million years ago in the context of their dinosaurs. In the movie, fictional scientists essentially resurrect and genetically redesign dinosaurs, pterosaurs, and even a giant mosasaur-creatures supposedly extinct for 65-75 million years.. The CRSQ study authors tested seven dinosaur bones, including a Triceratops from Montana, hadrosaurids, a cartilaginous paddlefish, a bony fish, and fresh-looking ...
Coria, R. A. and L. Salgado. 1995. A new giant carnivorous dinosaur from the Cretaceous of Patagonia. Nature 377:224-226.. Hengst, R. 1998. Lung ventilation and gas exchange in theropod dinosaurs. Science 281:47-47.. Middleton, K. M. and S. M. Gatesy. 2000. Theropod forelimb design and evolution. Zoological Journal of the Linnean Society 128:149-187.. Novas, F. E. 1992. Phylogenetic relationships of the basal dinosaurs, the Herrerasauridae. Paleontology 35:51-62.. Padian, K., J. R. Hutchinson, and T. R. Holtz. 1999. Phylogenetic definitions and nomenclature of the major taxonomic categories of the carnivorous Dinosauria (Theropoda). Journal Of Vertebrate Paleontology 19:69-80.. Ruben, J. A., C. Dal Sasso, N. R. Geist, W. J. Hillenius, T. D. Jones, and M. Signore. 1999. Pulmonary function and metabolic physiology of theropod dinosaurs. Science 283:514-516.. Ruben, J. A., T. D. Jones, N. R. Geist, and W. J. Hillenius. 1997. Lung structure and ventilation in theropod dinosaurs and early birds. ...
A single moment can change everything. In the Good Dinosaur that moment was when an astroid missed earth.. Get the Free Tracker App to find WowWee Fingerlings. "The Good Dinosaur" asks the question: What if the asteroid that forever changed life on Earth missed the planet completely and giant dinosaurs never became extinct?. Pixar Animation Studios takes you on an epic journey into the world of dinosaurs where an Apatosaurus named Arlo makes an unlikely human friend.. While traveling through a harsh and mysterious landscape, Arlo learns the power of confronting his fears and discovers what he is truly capable of.. The new Pixar movie has kind of a new look for Pixar. The dinosaurs are very cartoony but on the other hand everything feels weirdly real. Disneys Pixar studio just created another stunning animated movie with a captivating and emotional story that will entertain the whole family on Thanksgiving weekend.. ...
Allosaurus is one of the best known theropod dinosaurs from the Jurassic and a crucial taxon in phylogenetic analyses. On the basis of an in-depth, firsthand study of the bulk of Allosaurus specimens housed in North American institutions, we describe here a new theropod dinosaur from the Upper Jurassic Morrison Formation of Western North America, Allosaurus jimmadseni sp. nov., based upon a remarkably complete articulated skeleton and skull and a second specimen with an articulated skull and associated skeleton. The present study also assigns several other specimens to this new species, Allosaurus jimmadseni, which is characterized by a number of autapomorphies present on the dermal skull roof and additional characters present in the postcrania. In particular, whereas the ventral margin of the jugal of Allosaurus fragilis has pronounced sigmoidal convexity, the ventral margin is virtually straight in Allosaurus jimmadseni. The paired nasals of Allosaurus jimmadseni possess bilateral, blade-like crests
Recently discovered fossil bones of a meat-eating dinosaur that flapped its arms like a bird but never got off the ground provide the best evidence yet of a long-sought missing link between dinosaurs and modern birds. Oil company geologists working near the discovery site determined that the sedimentary rock in which the dinosaur bones were found is about 90 million years old -- a date far more recent than Archaeopteryx or other early birds. To paleontologist Kevin Padian of the University of California at Berkeley, an expert on flying reptiles, the newly discovered dinosaur offers striking evidence that at least this creature was able to fold its forearms against its body and flap them -- much like a chicken running, he said. [...] the new fossil shows a strong resemblance to the wing structure that enabled the earliest true flying birds to evolve from dinosaurs, Padian said yesterday.
FOSSILIZED FOOTPRINTS - A DINOSAUR DILEMMA. By Dr. Andrew A. Snelling. October 1, 2010. Cool! dinosaur tracks! How can todays slow-and-gradual geologic processes over millions of years explain the preservation of delicate impressions in mud before they are washed away? Does the Flood provide a better explanation?. Thousands of dinosaur footprints have been found in the geologic record, often in long trackways of successive left and right footprints. With the help of these clues, paleontologists have deciphered many details about the behavior of these fascinating creatures.. Who Has a Dilemma?. Dinosaur footprints create an apparent dilemma for creationists. How could they ever be made and fossilized during the Flood?. After all, with the Flood waters covering the entire earth, the dinosaurs would have nowhere to walk. Even if they did, the churning waters would erode away any footprints left behind. Secular geologists and skeptics often raise this question and are sometimes scathing in their ...
Hindustan TimesThe Indian landmass was home to at least 20 species of dinosaurs between 228 million years ago and 65 million years ago.Today they exist only as fossils. Dino remains have been excavated from the fossil-rich Narmada Valley Basin in Madhya Pradesh, Maharashtra and Gujarat. Remains have also been unearthed as far apart as Tamil Nadu, Meghalaya and Barkhan in Pakistan. In central India, nests of up to 24 dinosaur eggs have been discovered, fossilised, in shallow pits into which they were once laid. Geologists consider India the largest known dinosaur hatchery in the world. We are also abundant in fossilised dinosaur dung, which offers rare insights on what dinosaurs ate. We have our own apex predators and giant herbivores. Theyve even earned Indian names like the Rajasaurus, Kotasaurus and Barapasaurus.
Earlier this month, a study in the journal Science tried to put to bed for good the question of dinosaur extinction: It was an impact from space, not large-scale volcanic activity, that wiped them out 65 million years ago, the study argued. Thats all well and good for the dinosaurs end, but what about their beginning?. This week in the Proceedings of the National Academy of Sciences, paleontologists say theyve studied the period about 200 million years ago when dinosaurs first came to power, and found that while catastrophic volcanic activity may not explain dinosaur extinction, it could have explained why dinosaurs competitors disappeared and the terrible lizards took over the planet.. Around the time of dino emergence, the continents were all locked up in the supercontinent Pangaea. As it pulled apart, researchers say the seismic activity gave rise to hundreds of thousands of years of volcanic activity, creating lava fields on the surface of the Earth the size of the continental United ...
There was a recent posting asking about sick dinosaurs and evidences for this, so I thought seeing how I am into dinosaur paleopathology (the study of ancient disease, injuries and related topics), I would take this opportunity to bring the group up to speed on some of the latest knowledge/research: 1. Illness. Dinosaurs could have (and probably did) suffer from a wide variety of illnesses, many of which we will never be able to diagnose successfully, if ever. Simply put, we need some evidence of the illness and without physical proof of the disease process (as manifested on teeth, bones, skin impressions, footprints) we can never really know. For example, dinosaurs could have suffered from colds, but colds do not leave any lesions (marks) on bones. Dinosaurs could have suffered from liver cancer, but wed never know it. I was once told that over 99% of current diseases leave no traces of their passing on bones so we are limited to less than 1% to deal with. Given the rarity of animals ...
What were the dinosaurs like? How long ago did they live? Can a dinosaur be created from DNA? Did they take care of their young? Why did they die out... or did they? The Standard Deviants, a dynamic troupe of young actors and comedians, will be your tour guides on this exciting adventure into the distant past! Join our intrepid dinosaur hunters as they examine the diets, habitats, traits and the eventual extinction of some of the largest creatures ever to roam the Earth! With the help of a respected dinosaur expert, the Standard Deviants - Dinosaurs - Lifestyles of the Big and Carnivorous will dispel dino myths and give you the bare-bone facts about these mysterious creatures, using humorous skits, computer graphics and a fun, easy-to-understand format! (Contains "A Day as a Dino" and "Guess Whos Coming For Dinner ...
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Theropods caught in their tracks. Fossil footprints show foot-movement similarity in dinosaurs and birds A new study of dinosaur footprints preserved in three dimensions finds similarities and differences between modern-day fowl and ancient theropods. The studys authors still believe birds evolved from dinosaurs. The research appears in Nature and was led by Brown University scientists. PROVIDENCE, R.I. -- A new study of theropod dinosaur prints shows that foot motions were preserved in three dimensions when the meat eaters slopped through mud 210 million years ago. Although the footprints are similar to those made by birds living today, there are significant differences in the position of the big toe, foot posture and hind limb movement.. "Living birds retain many features from their theropod ancestors, but hind limb anatomy and function did change," said lead scientist Stephen Gatesy, assistant professor of ecology and evolutionary biology at Brown University. "Birds do not move exactly like ...
A Window into the Transition from Small, Bipedal Herbivores to Quadrupedal Giants? Aardonyx celestae life reconstruction by Csotonyi, used by permission of the artist. This dinosaur from the Early Jurassic (195 million years ago) of South Africa is shedding new light on the origins of the most enormous dinosaurs ever: the sauropods. Sauropod dinosaurs reached…
Most paleontologists believe that a group of dinosaurs evolved into todays birds, but in trying to understand that gradual process theyve been bedeviled by some details. Yesterday, researchers announced that they may have solved one of those small conundrums. A fossilized dinosaur found in China appears to settle the matter of exactly how the bones in dinosaurs feet evolved into the digits hidden in bird wings.. The newly discovered ceratosaur belonged to a group of dinosaurs called theropods, which are thought to have given rise to modern birds and which included the mighty Tyrannosaurus rex. But unlike its T. rex cousin, this ceratosaur appears to have been a vegetarian. Says study coauthor James Clark: "Its a really weird animal - its got no teeth, had a beak and a very long neck, and very wimpy forelimbs…. Then when we looked closely at the hand, we noticed it was relevant to a very big question in palaeontology" [BBC News]. In the study, published in Nature, the researchers explain ...
Fun Fact:. Pachypodosauria (potential new name for Saurischians w/o Theropods) was named by Friedrich von Huene in 1914. Ironically Pachypodosauria was originally used to group theropods and sauropodomorphs (he also named Sauropodomorpha). This isnt the first time the Saurischian-Ornithischian framework has been questioned. Bob Bakker proposed some major changes in The Dinosaur Heresies in 1986. He proposed putting herrarasaurids on their own, Theropods on their own, and Phytodinosauria "plant dinosaurs" on its own. Which effectively separating out herbivores from carnivores. This was part of a larger argument to remove Dinosauria from Reptilia to emphasize their bird-like warm bloodedness. In the book he says "I proposed this sort of classification in 1975 in an article I published in in Scientific American. Most taxonomists, however, have viewed such new terminology as dangerously destabilizing to the traditional well-known shcheme that has been with us since the time of Baron ...
Dinosaur Train Dinosaur Big City, Pt. 1/Dinosaur Big City, Pt. 2 Dinosaur Big City Part I - Buddy and the Pteranodon family begin their journey on the Dinosaur Train, gathering all their Theropod friends together to travel to a really big Theropod Club Convention which is being held in Laramidia, the "Dinosaur Big City"! Dinosaur Big City Part II - The Pteranodon family continues their journey to the Theropod Convention in Laramidia, the Dinosaur Big City! Among the Theropod dinosaurs that ride the Train with them is King Cryolophosaurus, who sings his songs "Big Ol Whistle-Stop Rock-n-Roll Dinosaur Tour" and "Whole Lotta Theropods"!. D ...
Fun Fact:. Pachypodosauria (potential new name for Saurischians w/o Theropods) was named by Friedrich von Huene in 1914. Ironically Pachypodosauria was originally used to group theropods and sauropodomorphs (he also named Sauropodomorpha). This isnt the first time the Saurischian-Ornithischian framework has been questioned. Bob Bakker proposed some major changes in The Dinosaur Heresies in 1986. He proposed putting herrarasaurids on their own, Theropods on their own, and Phytodinosauria "plant dinosaurs" on its own. Which effectively separating out herbivores from carnivores. This was part of a larger argument to remove Dinosauria from Reptilia to emphasize their bird-like warm bloodedness. In the book he says "I proposed this sort of classification in 1975 in an article I published in in Scientific American. Most taxonomists, however, have viewed such new terminology as dangerously destabilizing to the traditional well-known shcheme that has been with us since the time of Baron ...
Dear Michael:. Do you honestly think the Sinclair people made their company symbol green because they had some serious scientific notion that real dinosaurs were green-and kelly green at that? They just thought it was an appealing color, and not as implausible as, say, lavender. Apart from their association with fossil fuels, dinosaurs are widely thought (by children at least) to be cuddly. You may recall that Sinclair at one time distributed inflatable plastic replicas of Dino. I had one, and found it inexplicably charming.. It is not known with any certainty what color brontosauruses were. No pieces of dinosaur skin have ever been found; like other soft tissue, it decays rapidly. The vertebrate fossil record is almost entirely in the form of bones and other durable items, and even then the original material has usually been salted out and replaced by various minerals. There have been a couple of skin impressions found, where a dinosaur sat down, one supposes, but these give no clue as to ...
Deciphering microscopic clues hidden within fossils, scientists have uncovered the vibrant colors that adorned a feathered dinosaur extinct for 150 million years, a Yale University-led research team reports online Feb. 4 in the journal Science.. Unlike recently published work from China that inferred the existence of two types of melanin pigments in various species of feathered dinosaurs, the Science study analyzed color-imparting structures called melanosomes from an entire fossil of a single animal, a feat which enabled researchers to reveal rich color patterns of the entire animal.. In fact, the analysis of melanosomes conducted by Yale team was so precise that the team was able to assign colors to individual feathers of Anchiornis huxleyi, a four-winged troodontid dinosaur that lived during the late Jurassic period in China. This dinosaur sported a generally gray body, a reddish-brown, Mohawk-like crest and facial speckles, and white feathers on its wings and legs, with bold black-spangled ...
Hadrosaurus, meaning "sturdy lizard", is a genus of hadrosaurid dinosaur from the Late Cretaceous Era that lived in what is now North America. Only one species is known: H. foulkii. It was discovered by John Estaugh Hopkins in 1838 while digging in a marl pit along the Cooper River in Haddonfield, New Jersey. He put the bones he discovered on display in his home, and in 1858, the remains sparked the interest of a visitor who went and recovered the rest of the fossilized remains in the marl pit. That same year, the species was named by paleontologist Joseph Leidy. He described the dinosaur in 1860, but his findings were not published until 1865 due to the American Civil War. The dinosaur skeleton was completely assembled in 1868 and put on display at the Philadelphia Academy of Natural Sciences. Though normally kept out of the publics eye, the skeletal display was open to the public from November 22, 2008 until April 19, 2009. Hadrosaurus was the first ever mounted dinosaur and became the state ...
Ben Creisler [email protected] A new paper: Aaron J. van der Reest, Alexander P. Wolfe & Philip J. Currie (2016) [2015] A densely feathered ornithomimid (Dinosauria: Theropoda) from the Upper Cretaceous Dinosaur Park Formation, Alberta, Canada Cretaceous Research 58: 108-117 doi:10.1016/j.cretres.2015.10.004 http://www.sciencedirect.com/science/article/pii/S0195667115300847 A recently discovered articulated partial skeleton of Ornithomimus from the Upper Cretaceous Dinosaur Park Formation of Alberta, Canada is remarkable in the extent and quality of preservation of integumentary structures including feathers. It is the first ornithomimid to preserve a tail bearing extensive plumaceous feathers that are slightly more elongate in comparison to those present on the remainder of the body. However, the underside of the tail and the hind limb distal to the middle of the femur appear devoid of plumage. Overall, the plumage pattern in Ornithomimus is similar to that of Struthio camelus (ostrich) and ...
Approximately 700 species have been named. However, a recent scientific review suggests that only about half of these are based on fairly complete specimens that can be shown to be unique and separate species. These species are placed in about 300 valid dinosaur genera (Stegosaurus, Diplodocus, etc.), although about 540 have been named. Recent estimates suggest that about 700 to 900 more dinosaur genera may remain to be discovered. Most dinosaur genera presently contain only one species (for example, Deinonychus) but some have more (for example, Iguanodon). Even if all of the roughly 700 published species are valid, their number is still less than one-tenth the number of currently known living bird species, less than one-fifth the number of currently known mammal species, and less than one-third the number of currently known spider species ...
Stegosaurus is a very famous dinosaurs, one of the most famous, along with Triceratops and Tyrannosaurus. All three of these dinosaurs have been found in Colorado; in fact, the first Triceratops bones were actually found in Denver, and Stegosaurus is the state dinosaur of Colorado! Stegosaurus has also been found in Wyoming and Utah, in the Morrison Formation, as well as in Portugal. The row of plates along its back make it very interesting looking, as do the spikes on the end of its tail, nicknamed a "thagomizer." Holes in the vertebrae of a potential predator of Stegosaurus, Allosaurus, fit exactly with the size of one of the spikes on the tail of the Stegosaurus, showing that there was almost certainly a predator-prey relationship between the two, as was previously suspected. Studies have shown that the tail end of Kentrosaurus, a close relative of Stegosaurus, also with a thagomizer on its tail, could have been brought around to the side of the dinosaur, potentially swatting at enemies ...
Evolutionists have long taught that mammals evolved millions of years after the reptiles. And, once mammals came on to the scene, allegedly millions of years after the dinosaurs supposedly evolved, all the mammals were "small, mostly about mouse-sized, and rare." In fact, we are told that for the first 150 million years of their existence, mammals "were never able to get beyond little ratlike things.". But, as so often is the case, when more evidence is gathered, evolutionary "facts" become outright errors. Four years ago, the fossils of a mammal "20 times larger" than what evolutionists believed to be possible were reported to be in the same fossil beds as the dinosaurs. Another fossilized mammal discovered in the same area actually had the remains of a five-inch dinosaur in its stomach. What does this prove? Only that mammals much larger than "little ratlike things" not only lived with dinosaurs, but even ate some of them for breakfast.. One year after scientists reported about the ...
The study of the last hadrosaurs that lived in the Iberian Peninsula has been possible thanks to the discovery by the Aragosaurus-IUCA Group of the University of Zaragoza, led by Jose Ignacio Canudo, of the first articulated hadrosaur skull found in southern Europe, from the archeological sites of Arén, in Huesca, Spain. The skull belongs to an Arenysaurus ardevoli, a lambeosaurine (hadrosaur with a hollow cranial crest), whose description was recently published in the French journal Comptes Rendus Palevol, and was part of the Spanish fossil record. According to paleontologists, the new lambeosaurine lived between 65.5 and 68 million years ago, had a very prominent frontal dome, and its biogeographical relationships suggest a paleobiogeographical connection between Asia and Europe during the Late Cretaceous.. Researchers have found, in addition to the partially articulated skull, the mandibular remains and postcranial elements such as vertebrae, girdle and limb bones.. The Spanish ...
Dinosaurs Alive" is a global adventure of science and discovery--featuring the earliest dinosaurs of the Triassic Period to the monsters of the Cretaceous "reincarnated" life-sized for the giant IMAX (R) screen. Audiences will journey with some of the worlds preeminent paleontologists as they uncover evidence that the descendents of dinosaurs still walk (or fly) among us. From the exotic, trackless expanses and sand dunes of Mongolias Gobi Desert to the dramatic sandstone buttes of New Mexico, the film will follow American Museum of Natural History paleontologists as they explore some of the greatest dinosaur finds in history. Through the magic of scientifically accurate computer-generated animation, these newly discovered creatures, and some familiar favorites, will come alive... in a big way ...
Rare Theropod Dinosaur Skull Allosaurus fragilis Jurassic Morrison Formation Albany County, Wyoming, USA The - Available at 2019 September 28 Nature &...
Warning! Dinosaurs have invaded the MIT lab! They may one day "roam" through a museum near you, too.. Researchers at the Massachusetts Institute of Technology Artificial Intelligence (AI) Lab in Cambridge have created a robotic dinosaur. The lab hopes to develop small, lifelike 3D representations of dinosaurs that will be used as educational tools. The project falls under the administration of MITs Leg Lab, a division of the AI Lab dedicated to simulating and building robots that walk like their biological counterparts.. After five years of work, scientist Peter Dilworth has created a robotic model of a troodon dinosaur (see the figure). The robotic version of this creature, dubbed Troody, can walk across a desk with lifelike body movement.. Currently, Troody is one of two bipedal robots at the Leg Lab. Known as M2, the other biped simulates the legs of a human. While it can stand and walk in place, M2 cannot yet walk forward. Series elastic actuators, or springs connected to motors, are ...
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The 3rd International Symposium on Dinosaur Eggs, Babies, and Developmental Biology provides opportunities for expanding our approach to other research areas of developmental biology, while at the same time maintaining our connection with the scientific problems of dinosaur eggs and embryos. Thus, in addition to papers on what has been the core of the previous meetings on Dinosaur Eggs and Babies-the morphology, taphonomy, taxonomy, and systematics of eggs, nest, and embryos-we invite participants to deliver papers on reproductive behavior and physiology, life history, ontogenetic development, growth rates and paleohistology, and sexual dimorphism, and to include birds (extant dinosaurs) within their focus of research ...
The Ultimate Dinosaurs exhibition is now CLOSED. Meet T. Rexs bigger, badder cousin! Ultimate Dinosaurs showcases some of the most spectacular dinosaur discoveries and cutting-edge scientific research from the last two decades. Evolved in isolation in the Southern Hemisphere, this exhibit reveals bizarre, unusual-looking dinosaurs virtually unknown to most North Americans.
Genetic mutations are usually very minor. You will never have a non dinosaur give birth to a dinosaur, or a cat give birth to a dog. Those are sudden major changes, and evolution does not work that way. What you would have is the dinosaurs ancestor slowly changing over time into what we know as a dinosaur (very broad description I know). Basically its the accumulation of numerous mutations or traits over time that change the appearance and genetic make up of a creature enough so that they cannot reproduce with the original ancestor from tens of thousands of years ago or more and deviates enough from the original to be classified as a different species ...
The first part of the app is a quiz where you answer questions about dinosaurs, such as types of dinosaurs, where and when they lived, what they ate, etc. The second part of the app is a puzzle for each dinosaur you answered a question about. Once you complete the puzzle, you find out if you got the answer correct from the quiz. Stars are awarded and levels are unlocked as you master your dinosaur facts.. One of the things that I personally didnt like, but didnt seem to bother my son, was that you have to complete the puzzle before you get the answers. This may be intentionally designed to get children engrossed in the app, however I felt that it disconnected the quiz part of the game.. Also, if I am being picky from an ease of use point of view, I found that the dark on dark writing for the questions, hard to read. When you select an answer it gives a green "light" which seems to indicate a correct answer, but it just means that you have selected the answer.. Bottom-line: I think this could ...
In the Savage Land, a group of Killer Folk got their hands on the sacred Nightstone. Moon Boy and Devil Dinosaur fought to reclaim it, but Moon Boy died as the Killer Folk were sucked into a vortex through time with the Nightstone. Moon Boys dying wish was for Devil Dinosaur to reclaim the Nightstone and to avenge him.[26]. Going through the portal, Devil Dinosaur ended up in New York City. The Nightstone had fallen into the hands of Lunella Lafayette - a genius 9-year-old - who deduced the Nightstone was actually a Kree Omni-Wave Projector. Lunella had identified the Inhuman gene within her own DNA and feared being transformed into a monster due to the changes brought about by Terrigen Mist. Due to several Terrigen clouds that had been drifting around the city following the Inhumans detonation of a Terrigen bomb, she took drastic action and intended to use the Nightstone to find a way to remove the Inhuman DNA. With Lunella refusing to give up the Nightstone, Devil Dinosaur was forced to ...
Researchers say the identification of the oldest basal (primitive) tyrannosauroid yet will shed light on the early evolution and geographical distribution of its ancestors-small therapod dinosaurs known as coelurosaurs that were the closest relatives of modern-day birds.. Its not only the oldest tyrannosaur but also the sexiest, Erickson said, what with its flashy crest atop its small head-an extravagant ornament likely used only for attraction and display purposes and the first of its kind seen in the tyrannosaurs predatory family. The creature has been named Guanlong wucaii and translated loosely from Chinese, thats crowned dragon five colors.. An internationally known expert on the development and evolution of the vertebrate musculoskeletal system, Erickson helped confirm the tyrannosauroid lineage of the two specimens by noting, among other features, the characteristic long hip, the U-shaped teeth and the fused nasal bridge. While they werent exactly T. rex look-alikes, they were ...
Dinosaurs are icons of success and failure. According to a long-standing hypothesis (Sloan et al. 1986; Sarjeant & Currie 2001; Sullivan 2006), the group was in decline long before its extinction at the end of the Cretaceous Period, 65 Myr ago. However, new evidence (Fastovsky et al. 2004; Taylor 2006; Wang & Dodson 2006) suggests a major increase in diversification during the Campanian and Maastrichtian, spanning approximately the last 18 Myr of the Cretaceous, a finding that emphasizes the dramatic nature of the apparently sudden extinction of dinosaurs at the end of the Cretaceous. This Late Cretaceous diversification has been seen as evidence that dinosaurs were part of the Cretaceous explosion of terrestrial life (Fastovsky et al. 2004; Weishampel et al. 2004) characterized by, among others, the rise of flowering plants, social insects and butterflies, as well as modern groups of lizards, mammals and possibly birds (Hedges et al. 1996; Grimaldi 1999; Dilcher 2000; Fountaine et al. 2005; ...
Buy Evolution and Palaeobiology of Early Sauropodomorph Dinosaurs (9781405169332): NHBS - Edited By: Paul M Barrett and David J Batten, Palaeontological Association
Whether we assume that a reptile (ectotherm) or mammal/bird (endotherm) equation should be used for a 38 tonne sauropod dinosaur can lead to a difference in estimated gut tissue mass of more than 1670 kg (or 4.4% of the assumed BM). In the case of sauropods, it has been postulated that these animals underwent an ontogenetic shift in their metabolic rate, from juvenile endotherms to adult mass homeotherms (with low metabolic rates; Farlow 1990; ,Sander & Clauss 2008), and the intestinal length is usually considered to reflect metabolic rate (,Williams et al. 2001). For example, owing to the apparent association of intestinal length and metabolism, this view of sauropod metabolism would imply that the growth of intestinal tissue mass was less during ontogeny in sauropods than that in mammals. This view would therefore justify the use of reptile equations for adult sauropods, thus alleviating theoretical constraints on the capacity of the coelomic cavity. ,Gunga et al. (2008) had already ...
Retired nuclear physicists and amateur fossil hunter Bill Ship discovered bones of dinosaur belonging to a previously unknown horned dinosaur that is closely related to Triceratops
In analyzing the catalog of dinosaur skin fossils and impressions, the scientists found that some traits were shared among almost all known dinosaurs, including scales and bony plates. But the presence of feathers and similar microstructures that resemble them were unique to particular clade, or group of related species. Known as coelurosaurs, this group includes tyrannosaurs like the famous T. rex; large, leggy "bird mimes" called ornithomimosaurs; and maniraptors, among whose ranks are both modern birds and therizinosaurs, the strange bipeds whose most distinctive trait was their nimble forelimbs with sharp, meter-long claws. [See a photo gallery of a T. rex fossil recently discovered in Montana.] Of course, some of these animals seem more bird-like than others, and the duo notes that more research is needed on the less obviously feather-like structures that appear in some of these and other dinosaurs, to provide a clearer evolutionary picture. "Whats really needed now is some detailed work ...
o Dinosauria Owen, 1842 (dinosaurs; dinosaurit, dinosaurukset, hirmuliskot) ,-- †Ornithischia Seeley, 1888 (bird-hipped dinosaurs, ornithischians; linnunlanteiset dinosaurit) `--o Saurischia Seeley, 1887 (lizard-hipped dinosaurs; saurischians; liskonlanteiset dinosaurit) ,--o †Sauropodomorpha Huene, 1932 (sauropodomorphs, long-necked plant-eating dinosaurs; pitkäkaulat) , ,--o †Guaibasauridae Bonaparte, Ferigolo & Ribeiro, 1999 sensu Ezcurra, 2010 , , ,?- †Agnostiphitys cromhallensis Fraser, Padian, Walkden & Davis, 2002 , , ,-- †Eoraptor lunensis Sereno, Forster, Rogers & Monetta, 1993 sensu Martinez et al., 2011 , , ,-- †Pampadromaeus barberenai Cabreira, Schultz, Bittencourt, Soares, Fortier, Silva & Langer, 2011 , , ,-- †Panphagia protos Martinez & Alcober, 2009; L.Trias. SAm. , , ,-- †Guaibasaurus candelariensis Bonaparte, Ferigolo & Ribeiro, 1999; L.Trias. SAm. , , `--o †Saturnaliinae Ezcurra, 2010 , , ,-- †Chromogisaurus novasi Ezcurra, 2010; L.Trias. SAm. , , `-- ...
A research project, published this week in the journal Nature, sheds light on the bizarre halszkaraptor - a dinosaur so unusual that scientists are hailing it as a new species. What is very special about it is that it looks very weird. It doesnt look like any other dinosaur that we know so far, Vincent Fernandez, a paleontologist at the European Synchrotron Radiation Facility and co-author of the study, told The Guardian. About the size of a goose, the dinosaur boasted a long tail, a curved, elegant neck and a duck-like bill. While that may seem all bird to you, the halszkaraptor is considered non-avian. Its also a close cousin to the Cretaceous Periods famously ferocious velociraptor.
New evidence raises questions about current theoryBiologists examining...Dinosaurs have long captured the imagination while their relationships...All experts agree that birds are related to theropod dinosaurs; howeve...Researchers led by Alan Feduccia of the University of North Carolina ...,Did,feathered,dinosaurs,exist?,biological,biology news articles,biology news today,latest biology news,current biology news,biology newsletters
I agree with the logic which says if dinosaurs were alive 1000 to 5000 years ago then wed have remains of them. Given there needs to be a large population to support them and dinosaurs are big, I doubt theyd remain hidden. We should have samples dating 1000-5000 years ago. Moreso, we should have numerous fossils dating from 5000 to 65 million years ago. The fact we do not find fossils in that time period is conclusively against any living dinosaurs in recent times. No way to deny it ...
Hey Nash. This has to do with the begining of the post, but do you plan on doing any posts in the future about how herbivorous dinosaurs might have changed their diet due to environmental changes? Id really love to see much more about niche partitioning (or the lack thereof), changing diets, etc. I know you dont do requests, but I just thought that might be a great topic that you could easily get into (since I know you love carcass rendering animals and the lack of major niche partitioning). Id especially like to see what you think of the idea of massive, carcass pilfering Ceratopsians. Maybe you could also draw a scene from the Dinosaur Park formation with all of the boar/hippopotamus like Ceratopsians, detritus grazing Ankylosaurs, jay like scavenging Oviraptorsaurs, Ornithomimids and Pachycephalosaurids. And those are just the herbivores ;). Thats all up to you of course, and I just reminded you so you can get your brain thinking. ...
A Triceratops brow horn discovered in Dawson County, Montana, has been controversially dated to around 33,500 years, challenging the view that dinosaurs died out around 65 million years ago. The finding radically suggests that early humans may have once walked the earth with the fearsome reptiles thousands of years ago. The Triceratops brow horn was excavated in May 2012 and stored at the Glendive Dinosaur and Fossil Museum. The Museum, which has since 2005 been in cooperation with the Paleochronology Group, a team of consultants in geology, paleontology, chemistry, engineering, and education, sent a sample of the outer portion of the Triceratops brow horn to Head of the Paleochronology Group Hugh Miller, at his request, in order to carry out Carbon-14 dating. Mr Miller sent the sample to the University of Georgia, Center for Applied Isotope Studies, for this purpose. The sample was divided at the lab into two fractions with the "bulk" or collagen break down products yielding an age of 33,570 ± ...
Seen by over 9 million people in more than 250 cities around the world, WALKING WITH DINOSAURS - The Arena Spectacular, is back. Be amazed and thrilled as the greatest creatures ever to walk the earth return before your eyes.. The dazzling $20 million production features new, state of the art technology, making this the biggest and best dinosaur show in the world. Internationally renowned designers have worked with scientists to create 18 life-size creatures, including the Stegosaurus, Raptors, and the terrifying Tyrannosaurus-rex!. Marvel at the story of their 200-million-year reign on earth, as the continents split and the show transitions from the Triassic to Jurassic eras. Watch them walk, hear them roar, and see their fight for survival and supremacy depicted in almost cinematic realism in front of you.. WALKING WITH DINOSAURS is the must-see live arena experience for audiences of all ages, so book your tickets now… before they become extinct!. ...
Lawrence Lambe erected the genus Edmontosaurus ("lizard from Edmonton") in 1917 from a find in the lower Edmonton Formation (now Horseshoe Canyon Formation), Alberta. Hadrosaurid systematics were addressed in a 1942 monograph by Richard Swann Lull and Nelda Wright. They proposed the genus Anatosaurus for several species of dubious genera. Copes famous mount at the AMNH became Anatosaurus copei. In 1990, Anatosaurus was moved to Edmontosaurus. One former Anatosaurus species was distinct enough from Edmontosaurus to be placed in a separate genus, named Anatotitan, so in 1990, the AMNH mount was relabelled Anatotitan copei.. Paleontologists have found a hadrosaurid leg bone in Paleocene rocks, but it was probably reworked from a Cretaceous source.[4]. One of the most complete fossilized specimens was found in 1999 in the Hell Creek Formation of North Dakota and is now nicknamed "Dakota". The hadrosaur fossil is so well preserved that scientists have been able to calculate its muscle mass and learn ...
Mallon reviewed data on nine species, ranging from horned dinosaurs, to stegosaurs to meat-eating dinos. Among the studies was a seminal 1976 paper assigning sexual dimorphism to about 20 specimens of a horned dinosaur called Protoceratops andrewsi. The authors analysis said males could be distinguished from females by a broader frill and larger bump on the nose. While the study used a large sample size, Mallons retesting of the data shows there is not enough evidence to separate the specimens into two distinct groups based on the shapes of their bones ...
Ankylosaurs were large, herbivorous Ornithischian Dinosaurs known from the Jurassic and Cretaceous. They are noted for their exceptional armour, with heads and bodies covered with thick plates of bone, their limbs by large spines which project from these plates, and their possession of weapons on their tails, either large bony clubs (Ankylosaurids) or large spines (Nodosaurids). This combination of large size, heavy armour and lethal-looking weaponry is surprising, as modern Mammals of comparable size to Ankylosaurs (basically Hippopotamus, Rhinoceros and Elephants) are largely ignored by even the largest predators, and Ankylosaurs lived alongside a range of smaller, less heavily armoured, and (presumably) generally more palatable Dinosaurs. This has led to the suggestion that the heavy armour and weaponry of Ankylosaurs may have been used in intra-specific competition (probably over mates) rather than to deter predators ...
Nyasasaurus ("Lake Nyasa lizard") is an extinct genus of Archosaur reptile from the Middle Triassic Manda Beds of Tanzania. It may be the earliest known dinosaur. The discovery was a handful of bones from two individuals, so its anatomy is only partly known. The bones were collected in the early 1930s, but have only recently been analysed. Researchers said: "Nyasasaurus possesses a unique combination of dinosaur character states and an elevated growth rate similar to that of definitive early dinosaurs. It demonstrates that the initial dinosaur radiation occurred over a longer timescale than previously thought (possibly 15 million years earlier)".[1] The find was six vertebrae and a humerus from one specimen, and five vertebrae from another. The humerus has a muscle attachment which is characteristic of dinosaurs (a long deltopectoral crest). Other features are consistent with its being a basal dinosaur.[1] Previously, the oldest record of dinosaurs was from Argentina and dated back to the ...
A new study, published today in Nature Ecology and Evolution, reveals that birds skulls evolved differently to their relatives and ancestors, and develop more like those of young dinosaurs and crocodiles.. Birds are the only surviving members of a group of feathered dinosaurs, and are close cousins to modern crocodilians (alligators, crocodiles and gavials). However, birds have unique skeletons, particularly their beaked skulls, which have wider dome-shaped cranial bones to accommodate proportionally larger brains and eyes.. Previously, Dr Arkhat Abzhanov, from the Department of Life Sciences at Imperial, and colleagues determined that the shape of the birds skulls most resemble those of young non-avian (non-birdlike) dinosaurs.. This evolutionary phenomenon is known as paedomorphism - where an adult retains features that are usually only seen at the young stages (embryo or baby) in its ancestors. Paedomorphism is caused by a change in timing of developmental events of an organism - for ...
Buy or license direct from the photographer this stunning image of : Triceratops , Horned Dinosaur Fossil , Museum Of Natural History , NYC
Dinosaur Skeletal Structures - Dinosaur skeletons often have unique features, such as horns and frills that may have had special purposes. Learn about dinosaur skeletons.
After gathering dust on a shelf for more than 90 years, two previously ignored skulls have been identified as a new dinosaur species which once roamed the plains of southern Alberta.The bones of the n...
WHETHER tyrannosaurs occupied predatory or scavenging niches has been debated for nearly a century1-5. Palaeontologists have turned to the study of dental morphology to address this question, but the results have been highly disparate. Some contend that the tyrannosaur dentition was very strong and well suited for engaging and killing herbivorous dinosaurs6,7. Others posit that tyrannosaurs ate carrion, because their teeth and/or jaws would fail during struggles with prey2,3. The discovery of skeletal remains with bite marks from Tyrannosaurus rex8makes it possible to estimate, through indentation simulations on bovine ilia, the bite forces produced by T. rexduring feeding. The estimates (6,410 to 13,400 N) rival the largest bite forces determined for any taxon to date and suggest that T. rex had very strong, impact-resistant teeth. Although these data do not prove that T. rex was predominantly predacious, they indicate that its dentition could probably withstand the stresses associated with prey
jason Silviria thanks for comments and thoughts. On storytelling - and this is partially my fault for using such a loading term - my main contention is this: there are dominant hypotheses i.e. narratives that arise for whatever reason - some authorities have more sway than others, some ideas best fit what is known at the time. But, and you touch upon this in your suggestion we consider multiple sexual mores as possible fits for dinosaurs, other more fringe ideas might get relegated away because they dont fit the dominant story if you will. And even when evidence mounts that challenges or supports such fringe ideas they get relegated away to brief mentions or explained away as aberrant. I come across this all the time in paleo: only T. rex could render and consume bone yet we have giant allosaur coprolites riddled with shards of bone and Morrison sauropod ischiums with gigantic tooth rakes through them. Or should we really presume that feathered dinosaurs were only first encountered recently ...
The oldest dinosaurs were bipedal and fast creatures, which had many competitors in the ecosystems of Pangea. In the Middle Triassic we already find species able to be classified into Saurischia (Herrerasaurus, Eoraptor) or Ornithischia (Pisanosaurus). The findings started at the end of the 20th century in the argentinian province called Ischigualasto, where Herrerasaurus ischigualastensis and Eoraptor lunensis was found. While Herrerasauridae was thought to be a sister taxon to Neotheropoda, Eoraptor became famous for its position as the most basal theropod dinosaur. The apomorphies linking the skeleton of these dinosaurs to theropods are numerous, for example wide intercentres of vertebrae, elongated humerus and manus, flat fourth metacarpal or the craniomandibular and intramandibular joint at the same level as the teeth rows. Later more discoveries of basal dinosaurs happened, which led to the creation of new hypotheses about the very early phylogeny of this group. Saturnalia tupiniquim was ...
If it werent for a series of cataclysmic events; a comet impact being first on the list, our planet could well still be the domain of dinosaurs. Dinosaurs fascinate us so much, that many people wish they were amongst us. Fortunately, the large format "Dinosaurs 3D" will be the closest thing to actually being in the presence of the extraordinary creatures without looking into our own extinction at the same time. Following Pr Rodolfo Coria, a world-reknown Argentinian paleontologist, we visit sites of major discoveries he has contributed to in Patagonia and travel back in time to see these amazing beasts come to life. Patagonia has given us the largest living animal to have ever walked the Earth: the titanesque plant-eating Argentinosaur, and its nemesis, the Giganotosaur, a bipedal carnivore, that could easily challenge the famous T-Rex. Deeply rooted in science, the film carries the audience through the lives of two specimens of these superb achievements of evolution. The action is intense and ...
Facts & description: This picture shows a sample of fossilized dinosaur poop. Fossilized animal dung is also known as coprolite. This particular sample was found in southwestern Saskatchewan, Canada. For more interesting information on dinosaur fossils check out our dinosaur fossil facts page. ...
Spread over an area of 400 hectare on either bank of Sabarmati river, Indroda Dinosaur and Fossil Park is an absolute treasure. It is believed to the second-largest hatchery of dinosaur eggs in the world. Run by Gujarat Ecological Education and Research Foundation (GEER), it is the only dinosaur museum in the country. Some also regard it as the Jurassic Park of India. The park houses a zoo, massive skeletons of sea mammals like the blue whale, a vast botanical garden, an amphitheater, interpretation centers and camping facilities. It also has a Wilderness Park, which is home to innumerable species of birds, reptiles, hundreds of nilgais, langurs and peafowls. It is one of the unmissable sights in Gandhinagar ...
Amazing new discoveries in South America are revolutionising what we thought we knew about the dinosaur world. It now seems that South America was home to both the largest meat-eater - so new its still without a name - and the largest herbivore - the enormous long-necked Argentinasaurus. And whats more, these dinosaurs lived at the same time in the same place. So its possible that like in a science fiction movie, in this prehistoric world these two giants of their kind fought each other in a spectacular clash of the Titans. Horizon follows the scientists to Argentina as they unearth one of these giants - a brand new species of dinosaur; the biggest carnivore ever discovered. Not yet named, this new creature is even bigger than T. rex, the so-called king of the carnivores. The new giant South American predator had a skull bigger than a man that was full of serrated, knife-like teeth and long powerful jaw muscles. They could dissect their prey with almost surgical precision. But even this
Much as I love all the new theories (new since my childhood anyway) about dinosaur coloring, and feathers, it mostly means that the kids books I read to my son about dinosaurs feature animals who appear to be wearing fringed feather sleeves, in lurid colors, over a typical scaly dinosaur skin. Maybe they did look like that, but mostly they look like that taxidermied lion, in terms of being a patchwork of guessed-at attributes. It doesnt help that no two artists seem clear on the proportionate size of a T-rexs arms to the rest of his body ...
After enjoying all this alive stuff we skipped over to Dinosaur National Monument (which spans Colorado and Utah) to admire the long dead. There is a very impressive wall of real dinosaur fossils and a trail to go hunting for more. The layers of rock are tilted by practically 90 degrees, which makes it very easy to travel through time and admire the different fossils. I dont understand dinosaur fossils. Usually, in the geologic record, something the size of Stegos thigh bone would represent quite a long period of time. But Stegos thigh bone can only actually represent an instant... so how does that work then ...
Pictures of the West, Dinosaur National Monument, Utah: Fossil bones in the dinosaur quarry, within the old visitor center building
A well-preserved dinosaur skeleton from Mongolia unites an unexpected combination of features that defines a new group of semi-aquatic predators related to Velociraptor. Detailed 3-D synchrotron analysis allowed an international team of researchers to present the bizarre 75-million-year-old predator, named Halszkaraptor escuilliei. The study not only describes a new genus and species of bird-like dinosaur that lived in Mongolia but also sheds light on an unexpected amphibious lifestyle for raptorial dinosaurs ...
The admirable effort of a single writer/illustrator, The Amazing World of Dinosaurs comes to us from the amazing world of 1981. It was a primitive age, when Donkey Kong was the cutting edge in video game entertainment, Bruce Dickinson had only just joined Iron Maiden, and popular palaeoart stood at an intriguing juncture. On the one hand, artists work still owed much to the classic depictions of great fossil lizards, but there was nevertheless a conscious move towards more recognisably modern restorations, spearheaded by the likes of John McLoughlin (who coined the phrase great fossil lizard when referring to the outdated ideas he railed against). But Ive said as much before. The Amazing World of Dinosaurs is interesting because it combines the old, the new, and the occasional foray into the bafflingly, spectacularly, book-crashingly wrong ...
I am a dinosaur enthusiast and have been aware of Noddy for some time, and I find it interesting that you mention the time lapse of the fossil being presented at the Australian Synchrotron. Just wondering, is the fossil still on display there, and is there anywhere that video can be seen? I understand if this was all exclusive, but since I have been interested in this dinosaur for quite some time (I remember Tom and Pat Vickers-Rich bringing it up when they were down at the Otways near Dinosaur Cove, and they mentioned some very intriguing features), I would appreciate it if there is any information I can get from anywhere, or even just any info on when it could become available if it isnt. If you want to reply, just do so on this page and I will check it when I can (no need to rush it or anything ...
Paleontologists now have evidence that dinosaurs lived on all of the continents. At the beginning of the age of dinosaurs (during the Triassic Period, about 230 million years ago) the continents we now know were arranged together as a single supercontinent called Pangea. During the 165 million years of dinosaur existence this supercontinent slowly broke apart. Its pieces then spread across the globe into a nearly modern arrangement by a process called plate tectonics. Volcanoes, earthquakes, mountain building, and sea-floor spreading are all part of plate tectonics, and this process is still changing our modern Earth. ...
The Soft Tissue in Dinosaur Bone - The soft tissue in dinosaur bone would have carried blood vessels, bone matrix and osteocytes. Find out more about the soft tissue in dinosaur bone.