Articles tagged with Dinosaurs
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Researchers found that endotherms have well-developed turbinates and larger nasal cavities than ectotherms, helping to cool their brains. This discovery sheds light on the evolution of nasal cooling in warm-blooded animals from their theropod dinosaur ancestors.
Researchers discovered that theropod dinosaurs, including T. rex and Velociraptor, had scaly lips similar to those of lizards, contradicting popular depictions. The study found that dinosaur teeth were not unusually large and were comparable in size to modern lizard teeth when adjusted for skull size.
A team of paleontologists used the history of steam engines to test competitive exclusion theory, finding limited evidence supporting its role in extinction. The researchers analyzed data on tractive effort, revealing that newer engines generated more power, making steam locomotives less efficient and eventually obsolete.
A team of Swedish and Norwegian palaeontologists has discovered remains of the earliest known ichthyosaur on the remote Arctic island of Spitsbergen. The discovery pushes back the origin and early diversification of ichthyosaurs to before the beginning of the Age of Dinosaurs.
Scientists used CT scans to analyze unopened expedition crates from the Tendaguru dinosaur site, revealing numerous dinosaur bones, including those of Dysalotosaurus lettowvorbecki. The images also provide a valuable testimony of the historic expedition and colonial context.
A recent study published in PLOS ONE reveals the discovery of 92 fossilized egg nests belonging to titanosaurs, some of India's largest dinosaurs. The finds provide insights into the reproductive habits and nesting behaviors of these prehistoric creatures, shedding light on their lives shortly before they went extinct.
A rare fossil discovery provides new insights into the diet of Microraptor, a bird-like dinosaur with four wings. The find suggests that Microraptor was an opportunistic predator feeding on various species, including fish, birds, lizards, and small mammals.
Researchers have uncovered a rare piece of evidence showing Microraptor, a small feathered dinosaur, ate mammals. The preserved gut contents contain the foot of a small mammal, providing conclusive proof of a diverse diet for this species.
Scientists studied fossil braincase material of Europasaurus, a long-necked herbivorous dinosaur from Northern Germany, to understand its reproductive and social behavior. The digital reconstruction of its inner ear showed that it had a good sense of hearing and possibly relied on balance immediately after hatching.
Researchers analyzed fossil bed in Nevada's Berlin-Ichthyosaur State Park to determine cause of mass extinction. They found evidence that ichthyosaurs died due to migration, not mass stranding or environmental toxins.
New research shows climate change played a key role in dinosaurs' rise to success during the Late Triassic and Early Jurassic periods. The planet's warming after the Triassic-Jurassic mass extinction event allowed sauropod-like dinosaurs to thrive and expand across new territories, becoming the dominant species.
Researchers used dental microwear texture analysis to infer feeding habits of large theropods, including T. rex and Allosaurus. The study found that these dinosaurs did not eat bones as frequently as thought, with juveniles having a different feeding behavior.
A modelling study published in Scientific Reports found that diplodocid tails were unlikely to create a supersonic boom due to their slow movement speed. The authors simulated tail movements using a model and found that adding hypothetical structures to the end of the tail did not allow it to reach the speed of sound without breaking.
Researchers found evidence that ankylosaurs used their tail clubs for social dominance and territorial battles, suggesting a complex behavior. The fossil of Zuul crurivastator revealed broken and healed spikes, indicating ritualized combat or 'jousting' among the dinosaurs.
A new egg species, Ramoprismatoolithus okurai, has been identified from Early Cretaceous fossil eggshell fragments found in Japan. The analysis of the eggshell fragments and impressions suggests an affinity with the troodontids, a group of small non-avian theropod dinosaurs.
A new species of herbivore, Transylvanosaurus platycephalus, has been revealed with a remarkably flat head. The discovery challenges the assumption that Europe had low diversity during the Late Cretaceous period.
Scientists discovered that the first complex, multicellular life forms on Earth were wiped out 550 million years ago due to oxygen loss in the oceans. The researchers used nearly every known Ediacaran animal's environment and habits to disprove previous explanations for their disappearance.
A team of researchers used AI pattern recognition to re-analyze footprints from the Dinosaur Stampede National Monument and concluded that they were made by an ornithopod dinosaur, a herbivorous species. The results contradicted the long-held assumption of a vicious dinosaur predator.
Researchers digitally reconstructed a Jeholornis skull, shedding light on its vision and sense of smell. The study found that Jeholornis had a larger olfactory bulb than modern birds, suggesting it relied heavily on its sense of smell.
Fossils of ostrich-like dinosaurs from Mississippi provide valuable insights into the diversity and distribution of North American ornithomimosaurs. The discovery reveals that these dinosaurs lived side-by-side with multiple species, including giant body sizes weighing over 800kg.
Researchers propose a new explanation for how dinosaur mummies might form, suggesting desiccation and deflation as a common pathway. This process is also observed in modern animal carcasses, revealing that rare fossils may not be as unusual as previously thought.
A new study identifies Scleromochlus taylori as an early relative of pterosaurs, shedding light on the evolution of flying reptiles. The discovery uses CT scans to provide detailed reconstructions of the fossil, confirming its link to lagerpetids and supporting the hypothesis that flying reptiles evolved from small, bipedal ancestors.
Researchers found that the return of radiolarians, a tiny marine organism, helped restore habitable conditions after the massive extinction event. The study suggests that every microorganism plays a vital role in regulating biogeochemical cycles and conservation of the planet.
Scientists from the University of Rochester have provided a more accurate simulation of the impact that formed Earth’s largest crater two billion years ago. The new research suggests the impactor was much larger, about 20 to 25 kilometers in diameter, and traveling at a velocity of 15 to 20 kilometers per second.
A new analysis suggests that bird-hipped dinosaurs evolved from silesaurs, which were first identified two decades ago. The study reveals a 25-million-year gap in the fossil record, but provides insight into the early evolution of ornithischians.
Researchers found evidence of declining dinosaur diversity in central China, with only three species of eggs and low number of dinosaurs for the last 2 million years. This decline may have been caused by global climate fluctuations and massive volcanic eruptions.
A new study suggests that massive volcanic eruptions were the primary cause of mass extinctions, including the one that wiped out the dinosaurs. The research found a strong temporal connection between flood basalt eruptions and significant climatic events.
Paleontologists at Tübingen University's Senckenberg Centre have discovered a previously unknown genus and species of dinosaur, Tuebingosaurus maierfritzorum. The herbivore lived in the Swabian Alb region from 203 to 211 million years ago, displaying similarities with large long-necked sauropods.
A team of paleontologists led by Virginia Tech has discovered a new, early dinosaur in Zimbabwe, which is the oldest dinosaur skeleton found in Africa. The newly named Mbiresaurus raathi was estimated to be around 6 feet long and weighed between 20-65 pounds.
Researchers have discovered a massive new mosasaur species from Morocco, named Thalassotitan atrox, which filled the apex predator niche. The giant mosasaur had massive jaws and teeth like those of killer whales and hunted other marine reptiles.
Large carnivorous dinosaurs, such as Tyrannosaurus rex, developed elliptical or oval eye sockets to absorb impact during high-speed bites. Researchers analyzed 500 dinosaur species and found these unique shapes only in large predators with skull lengths over 1m.
Researchers used 3D modeling and engineering to digitally reconstruct the function of foot bones in sauropods, discovering a soft tissue pad beneath the heel that cushioned the foot to absorb weight. This finding confirms a long-suspected idea and provides biomechanical evidence for how sauropods supported their enormous weight on land.
Dinosaurs had high metabolic rates, suggesting they were endotherms, which allowed them to regulate their body temperature. This finding refutes previous ideas that dinosaurs were intermediate between ectotherms and endotherms.
A new study published in Evolutionary Biology refutes a claim that Tyrannosaurus rex should be reclassified into three separate species based on variations in leg bones and teeth. The researchers found that the earlier proposal lacked sufficient evidence and was based on limited comparative samples, non-comparable measurements, and imp...
A new study reveals that Triassic dinosaur species endured freezing conditions due to their well-developed feathers. This adaptation allowed them to thrive in colder climates, while other reptiles perished. The discovery sheds light on the ecological rise of dinosaurs after the Triassic-Jurassic Extinction.
A new study suggests that dinosaurs were well adapted to cold temperatures and survived a mass extinction event caused by massive volcanic eruptions. The research found evidence of dinosaur footprints and pebbles in lake sediments at high latitudes, indicating that they thrived in conditions where other reptiles died.
A new study in Frontiers in Earth Science questions the link between climate change and ecosystem diversity during the origin of dinosaurs in Argentina. The researchers found that variations in species abundance cannot be explained by climatic changes, instead attributing it to preservation and sampling biases.
Researchers have identified the remains of Europe's largest ever land-based hunter, a 10m long spinosaurid dinosaur that lived around 125 million years ago. The 'White Rock spinosaurid' was a predator of immense size and likely supported a range of scavengers after death.
New research published in Geosciences finds that precipitation, not temperature, influenced the distribution of herbivorous dinosaurs in what is now Alaska. Hadrosaurids preferred wetter climates with narrower annual temperature ranges, while ceratopsids preferred milder and drier conditions.
Paleontologists discovered sets of fossils representing three new ichthyosaurs, including the largest ichthyosaur tooth ever found. The discovery includes a 15-meter-long ichthyosaur and the largest trunk vertebra in Europe, rivaling the 21-meter long Shastasaurus sikkanniensis.
Fossil finds from the High Alps reveal giant ichthyosaurs that lived around 205 million years ago, measuring up to 20 meters in length. The discovery sheds new light on these prehistoric creatures and their paleobiological implications.
A new SMU study suggests that precipitation played a more direct role in shaping large herbivore populations than temperature in ancient Alaska. The research provides historical insights into the consequences of climate change and may help inform modern strategies to mitigate its effects.
A new study has found that pterosaurs could change the color of their feathers using melanin pigments. The research is based on a 115-million-year-old fossilized headcrest of the Tupandactylus imperator pterosaur from north-eastern Brazil.
A triceratops specimen known as 'Big John' displays injuries to the skull that may have occurred during combat with another triceratops. The fossilized remains show signs of a traumatic injury and healing process, suggesting similarities between dinosaur and mammalian bone repair mechanisms.
Researchers analyzed an abnormal trackway of six theropod dinosaur footprints in Spain, dating to around 129 million years ago. The tracks show evidence of an injured innermost toe and abnormal gait as the dinosaur compensated for its injury.
For the first 10 million years after dinosaurs died out, mammals bulked up to boost their survival chances. Their brain sizes decreased as a result, with relative brain sizes of early mammals decreasing due to increased body size.
Paleontologist Kevin Padian suggests that T. rex's short arms evolved to prevent accidental or intentional amputation during pack feeding, a behavior thought to be common among the species. This hypothesis proposes that the reduced forelimbs provided an adaptive advantage by reducing the risk of injury during intense feeding interactions.
A massive volcanic eruption at the end of the Triassic period caused a global cooling effect, leading to the mass extinction. The event paved the way for the rise of dinosaurs as their natural predators went extinct.
Researchers analyzed bone density and found Spinosaurus and its relative Baryonyx had dense bones like fish-eating predators, allowing them to submerge underwater. This supports the aquatic lifestyle of these dinosaurs, contrary to previous debates.
Researchers found that Spinosaurus and its close relative Baryonyx had dense bones that would have allowed them to submerge underwater to hunt. In contrast, Suchomimus had lighter bones that made swimming difficult, leading the team to conclude that these dinosaurs likely waded instead.
New research links high levels of stratospheric sulfur to the Chicxulub impact, which ignited widespread fires and global cooling. The unique fingerprints in sulfur aerosols provide direct evidence for catastrophic climate change and cooling.
A recent study has identified soil erosion and wildfire activity as significant contributors to the mass extinction event that occurred at the end of the Triassic period. The research found that soil erosion was a more prominent terrestrial ecological stress than intensive wildfire activity, with fire events likely being localized rath...
A newly described softshell turtle, Hutchemys walkerorum, lived in North Dakota 66.5 million years ago, surviving the end-Cretaceous mass extinction alongside Tyrannosaurus rex and Triceratops. The find sheds light on the evolution of softshell turtles during this period.
Researchers from Denmark and Sweden have dated the massive Hiawatha impact crater in Greenland to 58 million years ago, revealing it occurred a few million years after dinosaurs went extinct. The crater's age opens up a new understanding of Earth's evolution during this period.
A new species of stegosaur, Bashanosaurus primitivus, has been discovered in China, dating back to the Middle Jurassic period, around 168 million years ago. This discovery sheds light on the evolution of stegosaurs and suggests that they may have originated in Asia.
Using 1D kinematics, students calculate the winner of a 193 million year-old race between Usain Bolt and Dilophosaurus wetherilli. Newton's second law helps Bolt leverage his acceleration to win by 2 seconds.
Researchers found physical differences in femur, dental structures across specimens suggesting re-categorization into three groups or species. Two new species, T. imperator and T. regina, are proposed based on analysis of 37 Tyrannosaurus specimens.
Researchers analyzed fossilized fish bones from the Tanis locality to reconstruct the latest Cretaceous seasonality. The study reveals that the catastrophic extinction occurred during northern-hemisphere spring and affected sensitive life stages of organisms, including dinosaurs.
The Chicxulub asteroid's impact, occurring in spring, marked the demise of non-avian dinosaurs and most marine reptiles. The fossilized fish bones revealed seasonal growth patterns and feeding habits that point to a catastrophic extinction event.
Researchers identified two new species of ancient bird fossils found in northwestern China. One species, Brevidentavis zhangi, had small peg-like teeth and a movable bony appendage at the tip of its lower jaw that may have helped it root for food.