Articles tagged with Paleontology
A new study reveals that the ancient reptile Sonselasuchus, a relative of the crocodile, began life on four legs before learning to walk on two. The discovery was made by analyzing the proportions of the limb skeletons of different animals, suggesting that the creature's bipedal stance may have resulted from differential growth patterns.
Researchers have discovered that crocodiles' growth rates are flexible and change depending on environmental conditions, revealing new insights into their life history. The findings challenge traditional methods used to age dinosaurs, suggesting a reevaluation of how growth marks are interpreted.
A new study by Geerat Vermeij and Tracy Thomson found that mollusks evolved unique physical traits at a frequency of once every 2 million years in early history, declining to about one trait every 9 million years. The evolution of these traits has become increasingly predictable over the 540-million-year history of mollusks.
The discovery of Eosteus chongqingensis and Megamastax amblyodus provides a major breakthrough in understanding the evolution of bony fishes, revealing primitive characteristics that evolved much earlier than previously thought. These findings confirm South China as the cradle for the origin of jawed vertebrates.
Scientists have discovered the southernmost Purgatorius fossils, challenging long-standing assumptions about archaic primate habitats. The new findings suggest that these early primates originated in the north and spread southward, diversifying after the mass extinction event.
A digital reconstruction of Little Foot's face reveals surprising similarities with Ethiopian fossils, challenging previous assumptions about early human evolution. The study sheds light on the diversity of fossil hominin faces across Africa and highlights the importance of the face in understanding primate adaptation and interaction.
The discovery of Tanyka's fossilized jawbone provides insights into the evolution of tetrapods. With its twisted jaw and sideways-facing teeth, Tanyka is a living fossil from an ancient lineage that thought had gone extinct.
The discovery of miniscule Purgatorius fossils in Colorado provides fresh insights into the evolution of the earliest-known relative of all primates. The find suggests that archaic primates originated in the north and spread southward, diversifying soon after the mass extinction at the end of the Cretaceous Period.
Researchers from University of Toronto found evidence of large predators like Varanops and Dimetrodon hunting young herbivores in the early Permian period. Scavengers and small arthropods also fed on these carcasses, highlighting a complex food web in ancient ecosystems.
Scientists studied six pieces of amber preserving extinct insects, including ants, to understand their roles in past ecosystems. The study found ants interacting with mites and termites in three cases, suggesting symbiotic relationships.
Researchers have uncovered a new, exceptionally preserved fossil site in Newfoundland, Canada, dating back to 551 Ma. This find dramatically alters our understanding of the 'Kotlin Crisis,' the first extinction event in animal history, which is now estimated to have resulted in an astonishing 80% loss of biodiversity.
A new study finds that fewer than 250 fossils are required to train an image-based AI algorithm, a significant improvement on previously thought numbers. The discovery could greatly speed up the identification process in vertebrate paleontology, where most fossils are fragmented and difficult to analyze.
A nearly complete skeleton of Alnashetri cerropoliciensis has been discovered in Argentina, providing the first evidence of this enigmatic group of dinosaur. The fossil's age and anatomy reveal that these tiny animals existed when the continents were still connected as Pangaea.
Fossils from the Lower Triassic of Western Australia confirm a cryptic marine temnospondyl community, showing that earliest sea monsters adapted to life in the sea and radiated rapidly into various ecological niches. The discovery also reveals worldwide dispersal of these ancient animals across supercontinents.
A new spinosaurid species, S. mirabilis, with a distinctive scimitar-shaped crest has been discovered in Niger's central Sahara, adding to the understanding of spinosaurid evolution. The fossil find challenges the long-held hypothesis that these fish-eating theropods lived in an oceanic habitat.
A new Spinosaurus species discovered in Niger suggests a third phase of evolution for the massive fish-eating dinosaurs. The fossil find indicates that spinosaurs like S. mirabilis specialized as shallow water predators in northern Africa and South America.
Researchers from the University of Tokyo used CT scans to study Triceratops' nasal anatomy, revealing a specialized structure called a respiratory turbinate. This unique feature helped regulate temperature and moisture levels in the dinosaur's large skull.
A rare fossil discovery in Montana State University's Museum of the Rockies has shed new light on the feeding habits of Tyrannosaurus. The embedded tooth in an Edmontosaurus skull suggests a face-to-face encounter between the two species, revealing a terrifying picture of the last moments of the duck-billed dinosaur.
Researchers propose a new explanation for wrinkly textures in rocks, suggesting that microbes lived in deepwater environments and used chemosynthetic energy. This finding could lead to a reevaluation of fossil records and the classification of ancient formations.
Scientists discovered a 307-million-year-old fossil of an early land vertebrate that evolved to eat plants, challenging previous assumptions about the origins of herbivory. The 'tyrant digger' had tough teeth on its roof and probably ate smaller animals along with vegetation.
A UT San Antonio-led research team identified chitin in trilobite fossils over 500 million years old, offering new insights into fossil preservation and the long-term carbon cycle. This discovery has significant implications for understanding how organic carbon is stored in Earth's crust over geologic time.
A University of Michigan study reveals that ancient American pronghorns were built for speed, with ankle bones remaining unchanged despite environmental change. The findings suggest that pronghorns adapted to running efficiently in a mosaic of woodlands and grasslands, implying their ability to thrive in future landscapes.
The earliest known bird, Archaeopteryx, had unique mouth features such as oral papillae, tongue bones, and bill-tip organs. These structures suggest that early birds evolved specialized ways to find and digest food efficiently, which is key to flight. The discovery provides new criteria for identifying dinosaur fossils as birds.
A new study reveals that young sauropods were a key food source for Late Jurassic predators, with adults unable to care for their eggs and offspring. The research team mapped out a 'food web' of the time, finding that sauropods had a significant impact on their ecosystem.
The Huayuan biota provides a rare snapshot of ancient ecosystems following the Sinsk Event mass extinction, featuring diverse animal species, complex food webs, and fully functional biological carbon pump mechanisms. The discovery sheds light on transoceanic dispersal events and refugia for faunal migration during this critical post-ex...
The study confirms that ancient lichens played a key role in forming the first soils and structuring terrestrial ecosystems. Researchers identified the presence of chitin, nitrogen compounds, and calcium microparticles compatible with modern lichen minerals.
The 'Wakuwaku Aira Dinosaur Museum Exhibition' drew 11,580 visitors to Aira Square in Aira City. The exhibition featured a reconstructed tyrannosaurid skeleton and recreated excavation site from Mongolia, as well as hands-on learning opportunities for children.
Researchers discovered that a significant drop in calcium levels in the ocean led to a massive decrease in carbon dioxide, driving global cooling and ending the planet's greenhouse era. The study suggests that changes in seawater chemistry played a key role in shaping climate history.
Researchers found a new species of filter-feeding pterosaur, Bakiribu waridza, in fossilized vomit from 110 million years ago. The pterosaur had fine teeth and was likely swallowed by a predator that regurgitated its skull and four fish, which were well-preserved.
Researchers found that animals living on convoluted coastlines were more likely to go extinct than those living on north-south orientated coastlines. This study provides new insight into patterns of biodiversity distribution throughout Earth history and highlights the importance of coastline geometry for survival during climate change.
Scientists successfully sequenced a woolly rhinoceros genome from a 14,400-year-old tissue sample found in an ancient wolf's stomach. The study reveals that the species likely died out due to rapid population collapse rather than gradual decline.
Scientists discovered that authigenic clays played a crucial role in preserving the Ediacara Biota fossils. The unusual chemistry of the Ediacaran seawater helped to form these clays, which acted as cement, holding together sand particles and replicating the organisms' soft-bodied forms.
Researchers used clumped-isotope palaeothermometry to reconstruct large temperature fluctuations at depths of up to 4,000 meters in the Southern Ocean. These fluctuations occurred simultaneously with changes in oxygen isotopes and Earth's orbital eccentricity, suggesting a climatic forcing.
The study found that organic materials in sediments decompose under supercritical conditions, releasing hydrogen molecules. This process is a more significant source of dissolved hydrogen in the ocean than previously believed.
Scientists reconstructed ancient genomes of Human betaherpesvirus 6A and 6B from archaeological human remains, confirming their integration into the human genome thousands of years ago. The findings suggest that HHV-6A lost its ability to integrate into human DNA over time.
Researchers discovered metabolites in fossilized bones of animals that lived 1.3 to 3 million years ago, providing insights into their health, diets, and environments. The findings revealed warmer and wetter conditions compared to today.
A new study uses three-dimensional geometric morphometric analysis to examine wrist ligament insertion sites in fossil hominids, revealing diverse locomotor behaviours and significant differences between species. The research expands palaeoanthropology methods, proposing an innovative approach to reconstructing human ancestor movement.
Researchers at the University of Zurich examined fossil records worldwide and found a consistent pattern: young shark species are more likely to go extinct. This challenges the long-held assumption that older species are less vulnerable to extinction.
A study has identified fossilized vertebrate footprints from the Quaternary period in fossil dune deposits in Murcia, attributed to the straight-tusked elephant Palaeoloxodon antiquus. The trackway found at Torre de Cope suggests an adult elephant about 2.3 meters tall and weighing around 2.6 tonnes.
Researchers discovered fossilized bee nests in a Dominican Republic cave, containing pollen and matching modern bee nest structures. The nests, dated to around 20,000 years ago, were likely built by solitary bee species using saliva-dirt mixtures.
Researchers found thousands of hutia fossils in a Caribbean cave, including nests made from compacted soil and coated with a waxy substance. The discovery provides evidence of the presence of bees in the area thousands of years ago, challenging initial findings on wasp nests.
The study reveals a 81m dinosaur trackway as the longest known in China and the fastest running theropod trackway from the Cretaceous period. The analysis indicates that medium-sized theropods ran at speeds of up to 45 km/h, while large theropods walked at slower speeds.
Researchers found a mosasaur tooth in North Dakota that revealed the giant reptile's ability to thrive in freshwater rivers. The study used isotope analyses to show that mosasaurs inhabited riverine environments in their final million years before extinction.
The discovery of a 66-million-year-old tooth in North Dakota, USA, reveals that mosasaurs may have hunted in freshwater environments as well as seas. The analysis of isotopes in the tooth's enamel suggests that the mosasaur preyed on freshwater animals and lived in a river-like area formerly connected to an ancient sea.
A new species of ancient sea cow has been discovered in Qatar, revealing that sea cows have shaped the Arabian Gulf's seagrass ecosystems for over 20 million years. The fossil site, Al Maszhabiya, yielded more than 170 different locations containing sea cow fossils.
A 300-million-year-old horseshoe crab fossil reveals evidence of ancient microbial infestation, pushing back the timeline of such events by over 300 million years. The discovery sheds light on the early interactions between animals and microbes in Late Carboniferous ecosystems.
Researchers used engineering simulations to test the anatomy of a 250-million-year-old mammal and found that it likely had an eardrum large enough to hear airborne sound effectively. The study's findings challenge previous hypotheses on how early mammals heard, providing new insights into their evolution.
A tiny fossil bird named Chromeornis funkyi has been discovered with a massive cluster of stones in its throat, suggesting it likely choked to death. The unusual find provides new insights into the evolution of dinosaurs and birds, revealing that this species may have died due to regurgitation of swallowed rocks.
A new paper published in Science reveals that Nanotyrannus is nearly fully grown and not an immature T. rex, while also providing insights into how giant predators achieved terrifying sizes quickly.
A new study reveals that Nanotyrannus lancensis was a fully mature, distinct species of smaller tyrannosaurid, not a juvenile T. Rex. The discovery sheds light on late Cretaceous ecosystems, suggesting greater predatory diversity than previously recognized.
Dinosaurs operated with a 'latchkey kid' approach, with young offspring independent and foraging alone after just a few months. This led to an increased number of functional species in dinosaur fossil communities compared to modern mammals.
A new study using hyoid bone analysis has confirmed that Nanotyrannus was a distinct species from T. rex, with the fossil standing at 18 feet tall compared to the massive 40-foot long T. rex. The findings provide conclusive evidence for the existence of Nanotyrannus and shed light on its growth patterns and ecosystem dynamics.
Researchers used CT scans to study brain cavities in ancient reptiles and found that pterosaurs had relatively small brains compared to birds. The study suggests that flight evolved independently in these groups without requiring significant brain changes.
Researchers assign a hominin foot fossil from Lucy's time to a different species, providing evidence that two ancient human ancestors coexisted in the same region. The Burtele foot belongs to A. deyiremeda, which retained an opposable big toe for climbing but likely pushed off with its second digit on two legs.
Researchers discovered a new 233-million-year-old nonflying relative of pterosaurs that provided breakthrough insights into the evolution of flight in these animals. The study found that pterosaurs evolved their own 'flight computers' from scratch, with unique brain structures and smaller brain sizes compared to birds.
A unique looping trail of ancient footprints in Colorado has provided insights into the behavior of a long-necked dinosaur, including possible evidence of limping. The analysis of over 130 footprints revealed subtle patterns, such as variations in footprint width and step length differences between left and right feet.
Scientists have discovered wolf remains, thousands of years old, on a small, isolated island in the Baltic Sea. The study suggests that grey wolves may have been managed or controlled by prehistoric societies, with evidence of complex relations and interactions between humans and wolves.
A team of international scientists reconstructed size evolution in ancient sharks using interdisciplinary analysis. The study revealed that modern sharks experimented with enormous body sizes much earlier in their evolutionary history than previously suspected.
Researchers found over 800 vertebrate fossils from a small area, including dinosaurs and other prehistoric creatures. The discovery provides valuable insights into the evolution of European dinosaur faunas during the Late Cretaceous period.
Researchers have discovered that sudden shifts in the Southern Westerly Winds 15,000 years ago triggered a massive growth of ancient bogs across the Southern Hemisphere. The study found that the shifting winds created an ideal climate for the swamps to form, and now believe they play a crucial role in regulating carbon stores in peatland.