Articles tagged with Paleontology
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 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 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 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.
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.
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 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.
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.
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.
Researchers have identified a tiny 'GPS' system in ancient magnetic fossils, suggesting that animals may have used the Earth's magnetic field to navigate long distances for at least 97 million years. The discovery provides direct evidence of magnetoreception and sheds light on how animals evolved this ability.
Researchers have successfully isolated and sequenced RNA molecules from Ice Age woolly mammoths, providing new insights into the biology of extinct species. The study reveals that RNA can be preserved for nearly 40,000 years, offering a glimpse into the final moments of life.
A study of an Early Triassic-age fossil site in the Arctic found complex and diverse oceanic ecosystems, with many marine tetrapod lineages diversifying soon after the end-Permian mass extinction event. The findings suggest that vertebrate evolution paralleled the rapid resurgence of invertebrate life in the Early Triassic.
A genomic study shows that diverse Eurasian cultures kept and spread genetically distinct dog populations over the last 10,000 years. The research highlights the deeply rooted cultural importance of dogs, with a tight link between human and dog genetics showing they were an integral part of society.
A newly discovered carnivorous lizard, Tainrakuasuchus bellator, lived 240 million years ago and resembled a dinosaur due to its armour-plated body. The species was among the top predators of its time in Brazil during the Triassic Period.
Researchers discovered a common parasite of modern oysters has been infecting bivalves for hundreds of millions of years. The parasite, belonging to the spionid group, has remained largely unchanged despite multiple mass extinction events.
A UTEP researcher discovered fossils of the plant-eating dinosaur Tenontosaurus in West Texas, extending its known geographic range. The discovery adds to our understanding of how dinosaurs dispersed across North America and adapted to diverse environments.
Researchers used electron microscopy to investigate ammolite's structural properties, finding that the colors are caused by light reflecting off narrow gaps between aragonite plates. The findings could inform the development of non-fading colored paints.
A tiny 5 cm long Neanderthal bone found in Crimea revealed ancient DNA showing genetic closest relation to Neanderthals from Siberia, over 3,000 kilometers away. Climate modelling suggests that Neanderthal groups likely migrated across vast Eurasian steppes during favourable climate periods.
Researchers from the Canadian Museum of Nature have described a nearly complete fossil skeleton of an extinct rhinoceros species, named Epiatheracerium itjilik, from the Haughton Crater in Nunavut. The Arctic rhino lived about 23 million years ago and is closely related to other European rhino species.
A 99-million-year-old fossil discovery sheds light on the evolutionary history of mosquitoes. The ancient larva shares modern species' morphology, challenging previous assumptions about their early evolution.
The discovery of Wadisuchus kassabi in the Campanian period (80 million years ago) sheds light on the origin and biogeography of Dyrosauridae, a group of ancient crocodiles that thrived in coastal and marine environments. The species highlights Egypt's Western Desert as a cradle of marine croc evolution.
Researchers found that bats exhibit heightened vigilance when competing with rats for food, displaying cautious behavior in winter but becoming more aggressive in spring. In some cases, bats were observed attacking rats, highlighting the threat posed by these pests.
Researchers used computational engineering techniques to simulate weight and gravitational stress on sauropod femurs. They found that two South American genera, Uberabatitan and Neuquensaurus, could generally remain standing for extended periods, allowing them to feed on high branches and defend against predators. The simulations sugge...
A team of UChicago paleontologists unveiled fossil specimens of the duck-billed dinosaur Edmontosaurus annectens, revealing its fleshy external anatomy in unprecedented detail. The 'mummies' preserved fine details of scales and hooves, including a spike row over its tail and hooves sheathing its toes.
A new study has precisely dated New Mexico fossils to around 66.4-66 million years ago, showing diverse dinosaur species thriving in the region until the end of the Cretaceous Period. This finding challenges the long-held idea that non-avian dinosaurs were in a gradual decline before extinction.
Researchers discovered that duck-billed dinosaur 'mummies' are actually delicate clay molds formed by microbes as they decayed. The unique preservation reveals complex hide patterns, similar to modern squamates, with functional and morphological similarities to some reptiles.
A new study suggests that Indigenous Australians may have been fossil collectors, rather than hunters, of Australia's megafauna. The researchers re-analyzed a fossilized tibia bone with an incision and found that it was likely already fossilized when the cut occurred.
A team of scientists mapped the magnetic domains on a giant magnetofossil and found that it could sense tiny variations in the Earth's magnetic field, enabling navigation. The discovery suggests that ancient marine organisms may have used a biological compass system.
A team of palaeontologists used refined electron microscopy to reveal fine growth rings in fossil otoliths, providing insights into fish growth, biomineralization, and environmental change. The study also revealed ultra-fine growth patterns that can be read like 'diary entries', offering new perspectives on ancient fish populations.
A new study analyzing fossil teeth from Vietnam and Laos reveals that animals with varied diets and habitats were more likely to endure, while narrow specialists largely disappeared. The research highlights the importance of conserving ecological conditions to protect species resilience.
Salterella, a tiny Cambrian creature, has been reclassified with cnidarians due to its unique shell structure and mineral composition. The research team suggests that Salterella's shell served a distinct purpose, possibly related to feeding or stability.
Researchers found vole teeth evolved from simple changes in tooth growth over six million years, making them excellent grass-eaters during ice ages. This discovery sheds light on how development steers species adaptation and informs conservation efforts.
A new study revises the origin story of freshwater fish, suggesting that oceanic fish invaded fresh water multiple times to develop improved hearing systems. The discovery was made using a newly discovered fossil fish with a Weberian apparatus, which allows it to hear sounds at high frequencies.
A 430-million-year-old fossil found in Wisconsin reveals that ancient leeches feasted on smaller marine creatures, challenging the assumption that they are bloodsuckers. The absence of a forward sucker in the fossil suggests a different early lifestyle for the group known as Hirudinida.
Scientists have uncovered a 167 million-year-old fossil lizard with snake-like features, challenging earlier assumptions about the evolution of snakes. The newly discovered species, Breugnathair elgolensis, has a mix of primitive and specialized traits that shed light on the origins of snakes and lizards.
A study has found that high-latitude phytoplankton communities responded to a pre-PETM warming event, highlighting the importance of examining background intervals in determining ecosystem change. The results suggest even small environmental changes can have dramatic impacts on marine ecosystems.
A new study traces the transformation of mammal communities across six continents over 50,000 years, finding that farming and hunting reshaped ecosystems. Only a handful of domesticated species, including cattle and horses, spread globally, altering native mammal populations.
A new ichthyosaur species, Eurhinosaurus mistelgauensis, has been described from the Mistelgau fossil site in Bavaria, Germany. The species shares striking similarities with dolphins and tuna, featuring a pronounced overbite similar to modern swordfish.
The Yunxian 2 cranium, dated to nearly one million years ago, exhibits a mix of primitive traits from earlier humans and more derived features shared with Homo longi and Homo sapiens. This suggests that the Yunxian group may represent a transitional form, capturing an early phase of rapid diversification within these lineages.