Dinosaur s. Medical search. Frequent questions

Dinosaur fossils have been found on all seven continents. (amnh.org)
Those clues to what dinosaurs were like are found in fossils-the ancient remains of an organism, such as teeth, bone, or shell-or evidence of animal activity, such as footprints and trackways. (amnh.org)
Today, in addition to patience and sharp observation skills, paleontologists employ new technologies to solve unanswered questions about dinosaurs and other fossils. (amnh.org)
The study is based on seemingly few bones - a humerus or upper arm bone and six vertebrae - though Nesbitt pointed out much of what we know about dinosaurs comes from similar number of fossils. (livescience.com)
Paleontologists have for about 150 years suggested dinosaurs existed in the Middle Triassic, as the oldest dinosaur fossils fit into the Late Triassic period. (livescience.com)
He points out that huge holes remain in the Triassic fossil record - the next-oldest well-preserved dinosaur fossils are about 15 million years younger. (newscientist.com)
The only exhibition of its kind to showcase holotypes of dinosaur fossils, Antarctic Dinosaurs immerses visitors in the thrilling hunt for never-before-seen fossils and sheds new light on our planet's ever-changing climate and geology. (fieldmuseum.org)
There is strong evidence of the impact, but no fossils of a dinosaur killed in the event itself have ever been found. (azpbs.org)
In the first episode, "Dinosaur Apocalypse: The New Evidence," viewers are introduced to the excavation of several groundbreakings finds in a corner of the Hell Creek Formation, an area long-famous for dinosaur fossils. (azpbs.org)
The prior theory that dinosaurs gradually died out before 65 million years ago was often based on what is known as the "3-meter gap," which referred to an apparent geological zone devoid of dinosaur fossils before the K-T event. (nbcnews.com)
The lonely region where it was discovered has turned out to be a hotbed of dinosaur fossils. (teachervision.com)
Molecular methods that have been applied to Mesozoic fossils-including iconic, non-avian dinosaurs- and the challenges inherent in such analyses, are compared and evaluated. (lu.se)

Using fossil evidence, paleontologists have identified over 900 distinct genera and more than 1,000 different species of non-avian dinosaurs. (wikipedia.org)
In order to preserve a record of the dinosaur steps, paleontologists Peter Falkingham, Karl Bates, and James Farlow have used a technique called photogrammetry to digitally reconstitute the dinosaur chase from Bird's own photos of the original, intact trackway. (nationalgeographic.com)
Paleontologists incorporate the research of biomechanics, applying the principles of both physics and engineering to reconstruct the biological movement of non-avian dinosaurs. (amnh.org)
By comparing the skulls of Protoceratops of different ages (like in the image above), paleontologists can draw conclusions about how some dinosaurs grew. (amnh.org)
While paleontologists know that dinosaurs were present in ancient New Zealand, the record of their presence is very sketchy. (nzherald.co.nz)
Paleontologists have developed a new theory to explain why the ancient ancestors of dinosaurs stopped moving about on all fours and rose up on just their two hind legs. (sciencedaily.com)
21, 2021 A team of paleontologists excavated four dinosaurs in northeastern Montana this summer. (sciencedaily.com)
Paleontologists have discovered a group of more than 20 polar dinosaur tracks on the coast of Victoria, Australia, offering a rare glimpse into animal behavior during the last period of pronounced global warming, about 105 million years ago. (emory.edu)
And now paleontologists have revealed what may be the smallest dinosaur of all time. (scientificamerican.com)
Paleontologists working in the Southeast Asian country have in recent years encountered dinosaur tails , baby birds , new insect species and even seagoing creatures that became enclosed in gobs of sticky sap. (scientificamerican.com)
It appears to be a relatively archaic form that paleontologists call a stem bird-a bird close to the point at which avians split from their feathered dinosaur ancestors. (scientificamerican.com)
In "Dinosaur Apocalypse," Sir David Attenborough follows clues from this prehistoric graveyard, where a team of paleontologists uncover evidence they believe could help shed light on some dinosaurs' final moments on Earth. (azpbs.org)
But as a postdoctoral researcher studying avian evolution, she sees them for what most paleontologists think they really are: living dinosaurs, the one surviving lineage of extinct carnivorous beasts like Tyrannosaurus rex. (audubon.org)

The misconception that non-avian dinosaurs were uniformly gigantic is based in part on preservation bias, as large, sturdy bones are more likely to last until they are fossilized. (wikipedia.org)
While the bones of the famous herbivore are Late Jurassic in age - roundabout 150 million years old - the tracks were left behind by another dinosaur that tromped around the shores of Early Cretaceous Texas in the neighborhood of 110 million years ago. (nationalgeographic.com)
The crocodile line ankle bones don't pivot on a straight line, unlike the dinosaur ankle bones which do. (amnh.org)
The information gleaned from fossil bones along with observations of both the movement and the musculature of living animal species help scientists model how non-avian dinosaurs may have moved. (amnh.org)
A wonky beast about the size of a Labrador retriever with a long neck and lengthy tail may be the world's earliest known dinosaur, say researchers who analyzed fossilized bones discovered in Tanzania in the 1930s. (livescience.com)
For their study, the researchers had to determine whether the bones indeed belonged to a dinosaur and how long ago the beast would've lived. (livescience.com)
Learn about T. rex's massive teeth, bones, habitat and other dinosaur secrets. (livescience.com)
Under the microscope, dinosaur bones cut with a rock saw and then ground very thinly provide information comparable to histological sections of fixed and embedded tissue of extant animals. (eurekalert.org)
With special permission from the Beijing Institute, Zhao sectioned two arm and two leg bones from 16 individual dinosaurs, ranging in age from less than one year to 10 years old, or fully-grown. (scienceblog.com)
Professor Xing Xu of the Beijing Institute, one of Dr Zhao's thesis supervisors, said: "This remarkable study, the first of its kind, shows how much information is locked in the bones of dinosaurs. (scienceblog.com)
Dinosaur bones have been discovered in northern Hawkes Bay, Port Waikato and the Chatham Islands. (nzherald.co.nz)
Lower Cretaceous strata of Victoria have yielded the best-documented assemblage of polar dinosaur bones in the world. (emory.edu)

Dinosaurs are represented on every continent by both extant species (birds) and fossil remains. (wikipedia.org)
While dinosaurs were ancestrally bipedal, many extinct groups included quadrupedal species, and some were able to shift between these stances. (wikipedia.org)
There are roughly 700 known species of extinct dinosaurs. (amnh.org)
During the Mesozoic Era (a period of more than 180 million years that included the Triassic, Jurassic, and Cretaceous periods), a species of non-avian dinosaur evolved into a species of avian dinosaur. (amnh.org)
There are several theories as to what may have contributed to the mass extinction of non-avian dinosaurs and other species at the end of the Cretaceous Period. (amnh.org)
The strange new species is the first known nonavian dinosaur that could both run and swim, researchers say. (sciencenews.org)
Previous work has focused almost exclusively on trends in taxonomic diversity (raw counts of species or genus richness) and absolute faunal abundance of dinosaurs during the final 20 million years of the Cretaceous. (nature.com)
They could also belong to two genders and a juvenile of one species - a little dinosaur family - but that's purely speculative," he adds. (emory.edu)
The two discoveries suggest that burrowing behaviors were shared by dinosaurs of different species, in different hemispheres, and spanned millions of years during the Cretaceous Period. (emory.edu)
A pink dinosaur of uncertain species -- 22 feet high and 58 feet long -- dates from 1962. (roadsideamerica.com)
Since then, around 700 different dinosaur species have been described, with more found every month . (cosmosmagazine.com)
And there's more to come-it's estimated that less than one percent of all dinosaur species have been discovered. (teachervision.com)
Combining anatomical information of the new species with other dinosaur and pterosaur precursors shows that morphological disparity of precursors resembles that of Triassic pterosaurs and exceeds that of Triassic dinosaurs . (bvsalud.org)

Clawed feet of a large carnivorous dinosaur - something like the ridge-backed Acrocanthosaurus - cross the same slice of time. (nationalgeographic.com)
In the February 2006, Martin found the first known carnivorous dinosaur track in Victoria , at a coastal site known as Dinosaur Dreaming. (emory.edu)
This was considered wild speculation at the time, but in 1997 a small carnivorous dinosaur named Sinosauropteryx was found to be covered not with scales, but a soft, fuzzy down. (cosmosmagazine.com)

Persistent public enthusiasm for the animals has resulted in significant funding for dinosaur science, and new discoveries are regularly covered by the media. (wikipedia.org)
Many of his greatest discoveries, including the first specimens of Tyrannosaurus rex ever found, are on display in the Museum's dinosaur halls. (amnh.org)
Popular knowledge of the occurrence of dinosaur eggs came about through the discoveries made in 1923 by the American Museum of Natural History on their expedition to Mongolia. (creationresearch.org)
Read about recent discoveries concerning dinosaurs. (teachervision.com)
Recent discoveries of dinosaur and pterosaur precursors6-10 demonstrated that these animals were also speciose and widespread, but those precursors have few if any well-preserved skulls , hands and associated skeletons11,12. (bvsalud.org)

Dinosaurs are a diverse group of reptiles of the clade Dinosauria. (wikipedia.org)
BARTA: because they're reptiles and they lived at the same time as dinosaurs. (amnh.org)
Dinosaurs are a group of reptiles that have lived on Earth for about 245 million years. (amnh.org)
Among fossil reptiles, the ichthyosaurs are recognized as being viviparous and it is necessary to consider that embryo development may have been already well underway when some dinosaur eggs were deposited. (creationresearch.org)
She noticed that the vertebrae of most dinosaurs and ancient marine reptiles look very similar to those of humans - that is, they do not have ball-and-socket joints. (eurekalert.org)
To this end, the team of researchers led by Tanja Wintrich and with the participation of the University of Cologne and the TU Bergakademie Freiberg as well as researchers from Canada and Russia examined a total of 19 different dinosaurs, other extinct reptiles, and animals still alive today. (eurekalert.org)
Surprisingly, Dr. Wintrich has now also been able to demonstrate that remnants of cartilage and even other parts of the intervertebral disc are almost always preserved in such ancient specimens, including marine reptiles like ichthyosaurs and dinosaurs like Tyrannosaurus. (eurekalert.org)
The word "dinosaurs" conjures up images of fierce and enormous reptiles. (scientificamerican.com)

While the dinosaurs' modern-day surviving avian lineage (birds) are generally small due to the constraints of flight, many prehistoric dinosaurs (non-avian and avian) were large-bodied-the largest sauropod dinosaurs are estimated to have reached lengths of 39.7 meters (130 feet) and heights of 18 m (59 ft) and were the largest land animals of all time. (wikipedia.org)
Nov. 8, 2019 The long-necked, big bodied sauropod dinosaurs comprise some of the largest terrestrial vertebrates to walk the earth. (sciencedaily.com)
They have also found that Eoraptor was not a predator at all, but a plant-eating sauropodomorph - a lineage that eventually evolved into the gigantic long-necked sauropod dinosaurs. (newscientist.com)

China, the world's second largest market for film, could be a financial boon, but "The Good Dinosaur" has yet to score a release date in the People's Republic and it's unclear if it will screen there. (yahoo.com)
The Argentine deposits have been famed as the home of the world's oldest true dinosaurs since the discovery in 1989 of Herrerasaurus . (newscientist.com)
For now, however, the 65-million-year-old Triceratops is the world's last known surviving dinosaur. (nbcnews.com)
In a remote desert area of Argentina, a villager found the remains of what is believed to be the world's longest dinosaur. (teachervision.com)
You're getting a window into the childhood of the world's favorite dinosaur," says one paleontologist. (teachervision.com)

Spinosaurus is a theropod dinosaur (that's the groups birds evolved within) found in what is now NOrth Africa, between about 112 and 97 million years ago. (scienceblogs.com)
Smaller three-toed tracks were probably made by small theropod dinosaurs. (nps.gov)
Eubrontes [or Bipedal theropod] fossilized tracks at Dinosaur Trackway NNL, Connecticut. (nps.gov)

Dinosaurs can therefore be divided into avian dinosaurs-birds-and the extinct non-avian dinosaurs, which are all dinosaurs other than birds. (wikipedia.org)
Evidence suggests that all dinosaurs were egg-laying, and that nest-building was a trait shared by many dinosaurs, both avian and non-avian. (wikipedia.org)
All non-avian dinosaurs went extinct about 66 million years ago. (amnh.org)
Modern birds are a kind of dinosaur because they share a common ancestor with non-avian dinosaurs. (amnh.org)
This avian dinosaur is the first bird and the forerunner of all birds. (amnh.org)
Every non-avian dinosaur went extinct 66 million years ago. (amnh.org)
The extinction of non-avian dinosaurs 65 million years ago is a perpetual topic of fascination, and lasting debate has focused on whether dinosaur biodiversity was in decline before end-Cretaceous volcanism and bolide impact. (nature.com)
2018. An Inventory of Non-Avian Dinosaurs from National Park Service Areas. (nps.gov)
The Triceratops , described in the latest Royal Society Biology Letters , dates to 65 million years ago, the critical period of time associated with the Cretaceous-Tertiary (K-T) extinction event that wiped out all non-avian dinosaurs and many other animals and plants. (nbcnews.com)
Chester continued, "Although the K-T mass extinction event is mainly known for the disappearance of the non-avian dinosaurs, it is also an extremely important event in mammalian evolution because once the dinosaurs vanished, mammals underwent a large adaptive radiation and began occupying diverse ecological niches in the Paleocene. (nbcnews.com)
Johnson told Discovery News that he agrees the Triceratops is indeed "the last known non-avian dinosaur of the Cretaceous. (nbcnews.com)
This project delivers the first reconstructions of the evolution of social cognition in the extinct dinosaur lineage that led to birds, the avian dinosaurs. (lu.se)
This project starts mending this gap by comparing the closest living relatives of non-avian dinosaurs - palaeognath birds and crocodilians - in fundamental socio-cognitive skills. (lu.se)

The fossil record shows that birds are feathered dinosaurs, having evolved from earlier theropods during the Late Jurassic epoch, and are the only dinosaur lineage known to have survived the Cretaceous-Paleogene extinction event approximately 66 mya. (wikipedia.org)
Since then, mounted fossil dinosaur skeletons have been major attractions at museums worldwide, and dinosaurs have become an enduring part of popular culture. (wikipedia.org)
A newly described fossil from China shows a badger-size mammal taking a bite out of a dinosaur-literally! (nationalgeographic.com)
In May 2006, during a hike to another remote site near Milanesia Beach, he discovered the first trace fossil of a dinosaur burrow in Australia . (emory.edu)
Two of these sites are within National Natural Landmarks, both in Colorado: Dinosaur Ridge in the Morrison-Golden Fossil Area (Colorado), and Roxborough State Park (Colorado). (nps.gov)
Dinosaurs make up one-third of all vertebrate genera found in the fossil beds, and all three major dinosaur groups had already appeared - not bad for a time when the beasts were thought to be rare. (newscientist.com)
If confirmed by further research, this would be the first time the fossil of a dinosaur that appears to have been killed by effects of the asteroid impact has been uncovered. (azpbs.org)
A Triceratops may have been the last dinosaur standing, according to a new study that determined a fossil from Montana's Hell Creek Formation is 'the youngest dinosaur known to science. (nbcnews.com)

Through the first half of the 20th century, before birds were recognized as dinosaurs, most of the scientific community believed dinosaurs to have been sluggish and cold-blooded. (wikipedia.org)
Under phylogenetic nomenclature, dinosaurs are usually defined as the group consisting of the most recent common ancestor (MRCA) of Triceratops and modern birds (Neornithes), and all its descendants. (wikipedia.org)
Birds are the sole surviving dinosaurs. (wikipedia.org)
In traditional taxonomy, birds were considered a separate class that had evolved from dinosaurs, a distinct superorder. (wikipedia.org)
Birds belong to the dinosaur subgroup Maniraptora, which are coelurosaurs, which are theropods, which are saurischians. (wikipedia.org)
Dinosaurs evolved into a very diverse group of animals with a vast array of physical features, including modern birds. (amnh.org)
Only bird-like predatory dinosaurs then evolved ball-and-socket joints as well and saddle joints, still seen in today's birds. (eurekalert.org)
July 5, 2023 Birds are the only group of dinosaurs that survived the asteroid-induced mass extinction 66 million years ago. (sciencedaily.com)
They appear to belong to three different sizes of small theropods - a group of bipedal, mostly carnivorous dinosaurs whose descendants include modern birds. (emory.edu)
both were identified as very primitive two-legged predatory dinosaurs called theropods, a group which ultimately gave rise to Tyrannosaurus rex and modern birds . (newscientist.com)
Living dinosaur relatives - birds and crocodiles - guard their eggs and their young, so it's a reasonable assumption that the dinosaurs did as well. (cosmosmagazine.com)
The consensus is in: Birds are living dinosaurs. (audubon.org)
She is using the latest video and computer modeling technology to study how baby birds develop the ability to fly, looking for clues as to how dinosaurs evolved into birds-one of the most dramatic and successful evolutionary transformations in the history of life on earth. (audubon.org)

Discover why the Tyrannosaurus had sharp teeth, where the name "dinosaur" comes from, and more! (amnh.org)

The discovery of dinosaur eggs and nests provided evidence for the behavior of some dinosaurs. (amnh.org)
Supposed nests of dinosaur eggs are examined for indications that they were laid under normal subaerial conditions. (creationresearch.org)
These questions arise because a first look at in situ "nests" of dinosaur eggs leads to the assumption that their occurrence must represent significant periods of time without attendant wave action from the global Flood. (creationresearch.org)
This time could vary from days to months for the needed nest building, incubation of the eggs, and attendant "brooding" by the parent dinosaur as well as the postulated rearing of young in the nesting location. (creationresearch.org)
Dinosaur eggs are found in abundance in several locations around the world. (creationresearch.org)
The mere occurrence of eggs is assumed to show that all dinosaurs were oviparous (Paul, 1994, p. 247). (creationresearch.org)
Scientists unearthed remains of a new kind of dinosaur and eggs in Patagonia. (go.com)
New evidence suggests that mama dinosaur likely perished at the same time as her eggs. (go.com)
In other words, some of the eggs may have been in the nest, not in the dinosaur. (go.com)
The eggs found with the mother's remains are unique, so researchers designated a new type of dinosaur egg called Arraigadoolithidae, named for Alberto Arraigada the owner of the site where the specimen was discovered. (go.com)
When Kundrát, a dinosaur expert from Uppsala University in Sweden, examined the eggshells, he noticed what 'turned out to be the first evidence of fungal contamination of dinosaur eggs. (go.com)
When expeditions to the Gobi Desert found a dinosaur atop a clutch of eggs, it was assumed to have died while plundering the nest. (cosmosmagazine.com)

The findings, detailed online Dec. 5 in the journal Biology Letters, push the dinosaur lineage back 10 million to 15 million years than previously known, all the way into the Middle Triassic, which lasted from about 245 million to 228 million years ago. (livescience.com)
So this pushes the dinosaur lineage or the closest relative to dinosaurs all the way back to the Middle Triassic," Nesbitt said during a telephone interview. (livescience.com)

Its favorite meals were probably herbivorous dinosaurs including Edmontosaurus and Triceratops . (livescience.com)
The Hell Creek Triceratops , however, was not only found within that 3-meter region, but it also exists at the upper reaches of it, proving that at least one dinosaur and presumably more were still alive when the meteorite blasted into Chicxulub, Mexico. (nbcnews.com)

Having four-legged babies and juveniles suggests that at some time in their ancestry, both juveniles and adults were also four-legged, and Psittacosaurus and dinosaurs in general became secondarily bipedal. (scienceblog.com)
Many ancient bipedal dinosaurs were herbivores, and even early carnivorous dinosaurs evolved small forearms. (sciencedaily.com)

Dinosaur footprints have been discovered by scientists in Nelson. (nzherald.co.nz)
By studying the region's geological layers, the scientists can see how dinosaurs suddenly disappeared after the catastrophic event, which Lyson and many other experts believe was a meteorite strike that directly hit Earth at Mexico's Yucatan Peninsula. (nbcnews.com)
The grouping was a surprise to scientists who had thought that meat-eating dinosaurs traveled alone. (teachervision.com)
As they discover ever-larger dinosaurs, it gets harder for scientists to name each massive beast-unfortunately for this unnamed hulker, Gigantosaurus, Supersaurus, and Ultrasaurus are already taken. (teachervision.com)
Because scientists know so little about that era-when not only dinosaurs but mammals developed-they hope the find will help them to unravel the mysteries of dinosaur evolution. (teachervision.com)

It's kind of your shoulder muscle or the equivalent in a dinosaur," Nesbitt told LiveScience, adding that " early dinosaurs are the only group to have this feature. (livescience.com)

Dr Browne believes the markings were made by sauropods, which were large herbivorous dinosaurs with long necks and tails and pillar-like legs. (nzherald.co.nz)

The majority of trackways were made by large herbivorous dinosaurs that usually walked on two legs (occasionally dropping onto all four) and had three toes per foot. (nps.gov)

At least some dinosaur groups, however, did endure long-term declines in morphological variability before their extinction. (nature.com)
Since this rhinoceros-looking, three-horned dinosaur lived so close to the mass extinction moment, it could negate an earlier theory that dinosaurs gradually died out before 65 million years ago. (nbcnews.com)
Co-author Stephen Chester of Yale's Department of Anthropology told Discovery News that the Camel Butte site is important both because it has "the most recent dinosaur specimen" and "because we are finding a great diversity of small mammals that are first documented directly after the extinction event. (nbcnews.com)
They have found fossilised grains of pollen that provide us with answers to what happened to plant life at the time of the extinction of the dinosaurs. (lu.se)
In order to study what happened at the time of the dinosaurs' extinction 66 million years ago, the researchers take us to the Badlands region of south-western North Dakota in the USA to look for fossilised pollen. (lu.se)

Nearby, the team uncovers what could be the leg of a small, herbivorous dinosaur called a Thescelosaurus - a creature that DePalma thinks may have experienced firsthand the deadly events triggered by the cataclysmic impact. (azpbs.org)

Researchers have long debated whether dinosaurs could swim, but there has been little direct evidence for aquadinos. (scienceblogs.com)
Researchers in Patagonia recently found skeletal remains of a newly designated genus of dinosaur - Bonapartenykus - near two broken eggshells. (go.com)
He and all of the other researchers, however, suspect that more recent dinosaurs even closer to the K-T boundary will be found in the future. (nbcnews.com)

The tails of proto-dinosaurs had big, leg-powering muscles," says Persons. (sciencedaily.com)

As for whether the beast is a dinosaur, several clues say it is. (livescience.com)

6. Were more dinosaurs plant-eaters or meat-eaters? (enchantedlearning.com)
The dinosaurs of Ischigualasto had already evolved features important for their later success, whether as predators or plant-eaters, says Sereno. (newscientist.com)

Having this muscle mass provided the strength and power required for early dinosaurs to stand on and move with their two back feet. (sciencedaily.com)

2. How small was the smallest dinosaur? (enchantedlearning.com)

Some evidence will be mentioned which suggests the same was true in the dinosaurs. (creationresearch.org)
The 70 million-year-old footprints are the first dinosaur footprints recognised in New Zealand and the first evidence of dinosaurs in the South Island. (nzherald.co.nz)
A serosurvey among 40 other Dinosaur National Monument in the Uinta Basin in northeastern Utah and northwestern workers did not find serologic evidence of recent infection. (cdc.gov)

The newly discovered dinosaur, preserved within hardened resin during the Mid-Cretaceous period of the Mesozoic era, is represented by nothing more than a skull. (scientificamerican.com)
This stature makes it the tiniest Mesozoic dinosaur yet discovered, significantly smaller than other contenders for the title, such as Fruitadens in Colorado. (scientificamerican.com)
Dinosaurs and pterosaurs have remarkable diversity and disparity through most of the Mesozoic Era1-3. (bvsalud.org)

The earliest known dinosaurs appeared during the Triassic Period (approximately 250 to 200 million ago). (amnh.org)
If the newly named Nyasasaurus parringtoni is not the earliest dinosaur, then it is the closest relative found so far," said lead researcher Sterling Nesbitt, a postdoctoral biology researcher at the University of Washington. (livescience.com)
Little is known about the earliest developmental stages of tyrannosaurs -- which lived more than 70-million-years-ago -- despite being one of the most studied dinosaur families. (sciencedaily.com)

Barner shows each spotlighted dinosaur in both skeletal and living form, and two concluding spreads offer more information in a height chart and 'dinometer' chart, fleshing out such questions as 'What did it eat? (publishersweekly.com)

Here we calculate the morphological disparity (anatomical variability) exhibited by seven major dinosaur subgroups during the latest Cretaceous, at both global and regional scales. (nature.com)

Previous to this find, all the oldest dinosaurs were all equally old from the same place in Argentina, and those sediments are about 230 million years [old]. (livescience.com)
Jawbones of the two oldest dinosaurs ever found were discovered by a boy on the African island of Madagascar. (teachervision.com)

The Mill Canyon Dinosaur Tracksite in southeastern Utah near Moab - which contains roughly 200 footprints from at least 10 different dinosaurs - was damaged in January when the Bureau of Land Management failed to take necessary precautions, the agency said in a report released Wednesday . (nypost.com)
The Mill Canyon Dinosaur Tracksite contains roughly 200 footprints from at least 10 different dinosaurs. (nypost.com)

The parade stops on a spiny looking, dinosaur-like lizard. (amnh.org)
Studies of dinosaur scales and feathers have revealed traces of melanin, the same pigment that lends colour to lizard scales, bird feathers and our hair. (cosmosmagazine.com)

Dinosaur Cousins? (librarything.com)

The evolution of social cognition in Archosauria: Gaze following and play as windows to social cognition in dinosaurs [Doctoral thesis]. (lu.se)

Only a rare few dinosaurs are excavated with near-complete skeletons , a la museum centerpieces. (livescience.com)
Scientific infatuation with larger dinosaurs was so great that informative and important skeletons were sometimes "headhunted," because collecting impressive skulls was seen as more critical for building collections. (scientificamerican.com)

On either side of Danny, white silhouettes of pterosaurs and dinosaurs appear with [POPPING NOISES]. (amnh.org)
A thought bubble emerges from his head and leads to the bottom of the screen where the text "Do Pterosaurs = Dinosaurs? (amnh.org)
The equals sign is crossed out, so now the sentence reads "Pterosaurs DO NOT equal dinosaurs. (amnh.org)
New reptile shows dinosaurs and pterosaurs evolved among diverse precursors. (bvsalud.org)
Thus, the 'success' of pterosaurs and dinosaurs was a result of differential survival among a broader pool of ecomorphological variation. (bvsalud.org)
Our results show that the morphological diversity of ornithodirans started to flourish among early-diverging lineages and not only after the origins of dinosaurs and pterosaurs. (bvsalud.org)

Large-bodied bulk-feeding herbivores (ceratopsids and hadrosauroids) and some North American taxa declined in disparity during the final two stages of the Cretaceous, whereas carnivorous dinosaurs, mid-sized herbivores, and some Asian taxa did not. (nature.com)

For instance, dinosaurs grew quickly, and a cross-section of the humerus suggests bone tissue was laid down in a haphazard way, a telltale sign of rapid growth. (livescience.com)
Our paper suggests that dinosaurs did not go extinct prior to the impact," lead author Tyler Lyson told Discovery News. (nbcnews.com)

At that time none of his colleagues would accept that dinosaurs had appeared so early in geological history. (livescience.com)
Ovoviviparity in the dinosaurs is beyond the scope of this paper and will be taken up another time. (creationresearch.org)
DINO SWIMMER This birdlike dinosaur, Halszkaraptor escuilliei , probably spent a lot of time in the water. (sciencenews.org)
Over time, proto-dinosaurs evolved to run faster and for longer distances. (sciencedaily.com)
These tracks provide us with a direct indicator of how these dinosaurs were interacting with the polar ecosystems, during an important time in geological history," says Emory paleontologist Anthony Martin , who led the research. (emory.edu)
Or were dinosaurs just very abundant and only this track-bearing area was preserved at this time? (nps.gov)
A similar dinosaur, Eolambia , lived in Utah at about this time. (nps.gov)
In some respects, the extra time paid off for "The Good Dinosaur. (yahoo.com)
Every time I look at a bird, I am seeing a dinosaur," she says. (audubon.org)
It is staggering that we can extract information from a material originating from the exact time when the dinosaurs became extinct. (lu.se)
Thanks to this kind of basic research in geology and astronomy, which of course was not available at the time of the dinosaurs, we would be able to discover an asteroid threat in good time and prevent it from hitting our planet", says Birger Schmitz. (lu.se)

Dr Browne said the footprints added useful information about how dinosaurs moved, how fast they moved and how big they were, as well as how soft the sediment was when they moved through the area. (nzherald.co.nz)

Add a prehistoric touch to modern technology with a dinosaur smartphone dock. (coolhunting.com)

And many dinosaurs - including duckbills, horned dinosaurs, sauropods, and armoured dinosaurs - do preserve scale impressions . (cosmosmagazine.com)

Analyses show that dinosaurs came in a wide variety of colours including black, white, and ginger . (cosmosmagazine.com)

The horned dinosaur Protoceratops was the size of a sheep. (cosmosmagazine.com)

Elaborate display structures such as horns or crests are common to all dinosaur groups, and some extinct groups developed skeletal modifications such as bony armor and spines. (wikipedia.org)
One egg with embryo was even found inside the skeletal remains of a hadrasaur (Hirsch 1994, p. 138), while another egg with an embryonic ornithischian dinosaur was found preserved in "fully marine conditions" of the chalk in Alabama. (creationresearch.org)

Dinosaurs are varied from taxonomic, morphological and ecological standpoints. (wikipedia.org)

They first appeared during the Triassic period, between 243 and 233.23 million years ago (mya), although the exact origin and timing of the evolution of dinosaurs is a subject of active research. (wikipedia.org)
She then traced the evolution of the soft tissues between the vertebrae along the family tree of land animals, which 310 million years ago split into the mammalian line and the dinosaur and bird line. (eurekalert.org)
Professor Mike Benton of the University of Bristol, Dr Zhao's other PhD supervisor, said: "These kinds of studies can also throw light on the evolution of a dinosaur like Psittacosaurus . (scienceblog.com)
Late Cretaceous dinosaur evolution, therefore, was complex: there was no universal biodiversity trend and the intensively studied North American record may reveal primarily local patterns. (nature.com)

Striking a proud pose in the Hall of Saurischian dinosaurs is the bulky skeleton of Apatosaurus , and trailing behind the sauropod's columnar legs is a series of deep dinosaur potholes. (nationalgeographic.com)

Martin spotted this first known dinosaur trackway of Victoria last June 14, around noon. (emory.edu)

The remains are from the birdlike dino which belonged to a group of dinosaurs known as the Alvarezsauridae. (go.com)

Now Ricardo Martinez of the National University of San Juan, Argentina, and colleagues have discovered another Triassic dinosaur in the deposits - a 1.2-metre-long predator that they have named Eodromaeus . (newscientist.com)
the dinosaurs' march to dominance of vertebrate fauna apparently stalled during the remaining 30 million years of the Triassic. (newscientist.com)
He thinks what happened to dinosaurs during the late Triassic was similar to what happened to mammals during the reign of the later dinosaurs. (newscientist.com)
Triassic dinosaurs couldn't displace the more abundant vertebrate groups - the rhynchosaurs and cynodonts - that dominated their world. (newscientist.com)

Tracking the growth of dinosaurs and how they changed as they grew is difficult. (scienceblog.com)
Using a combination of biomechanical analysis and bone histology, palaeontologists from Beijing, Bristol, and Bonn have shown how one of the best-known dinosaurs switched from four feet to two as it grew. (scienceblog.com)

This leads to the conclusion that dinosaur nests, as they are presently found, cannot represent normal living environments for the dinosaurs and instead show life existed at the survival level under highly stressed conditions. (creationresearch.org)
The report found that "areas of avoidance" were not properly flagged and a paleontological monitor was not in place during the project to rebuild a viewing boardwalk at the 2.3-acre area ranked as one of the top 10 dinosaur tracksites in the US. (nypost.com)
The discovery, reported in the journal Alcheringa , is the largest and best collection of polar dinosaur tracks ever found in the Southern Hemisphere. (emory.edu)
Few dinosaur tracks, however, have been found. (emory.edu)

Dinosaur Island is a 1994 B-movie directed by Fred Olen Ray. (realitytvworld.com)

Some consider Barnum Brown, who began his career at the American Museum of Natural History in 1897, to be one of the greatest dinosaur hunters of the late 19th and early 20th centuries. (amnh.org)

Eventually, some proto-dinosaurs gave up quadrupedal walking altogether. (sciencedaily.com)

Anatomy8

Organisms5

Analytical, Diagnostic and Therapeutic Techniques and Equipment1

Psychiatry and Psychology1

Phenomena and Processes6

Disciplines and Occupations3

Anthropology, Education, Sociology and Social Phenomena3

Information Science2

Geographicals1

Fossils12

Paleontologists13

Bones12

Species13

Carnivorous dinosaur3

Discoveries5

Reptiles8

Sauropod3

World's5

Theropod3

Avian13

Fossil8

Birds13

Tyrannosaurus1

Eggs12

Lineage2

Triceratops2

Bipedal2

Scientists5

LiveScience1

Long necks and tails1

Large herbivorous dinosaurs1

Extinction5

Herbivorous1

Researchers3

Tails1

Clues1

Plant-eaters2

Early dinosaurs1

Smallest dinosaur1

Evidence3

Mesozoic3

Earliest3

Barner1

Major dinosaur1

Oldest dinosaurs2

Different dinosaurs2

Lizard2

Cousins1

Social cognition1

Skeletons2

Pterosaurs6

Herbivores1

Suggests2

Time11

Footprints1

Prehistoric1

Sauropods1

Analyses1

Protoceratops1

Skeletal2

Morphological1

Evolution4

Apatosaurus1

Trackway1

Birdlike1

Triassic4

Grew2

Found4

19941

19th1

Quadrupedal1