Articles tagged with Paleontology
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.
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.
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.
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.
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 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 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 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 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.
A team from the University of Liège has developed equations to estimate the size of large marine reptiles from incomplete fossil skeletons. This allows for a better understanding of the evolution and ecology of these marine predators.
A new study explores why certain parts of reptiles, such as lizard jaws and snake vertebrae, are more likely to be preserved as fossils. The research reveals that physical characteristics like bone density and body size, as well as the environment in which the animals lived and died, are major predictors of fossil completeness.
An international team has published a new framework for studying 'Earth engineers' who have fundamentally altered ecosystems globally. The framework distinguishes between engineering behaviors with local and planetary scale effects, offering insights into how humans and other organisms have shaped the planet.
Researchers have identified 21 bio-inclusions of ancient insect orders and plant fossils in Ecuador's Genoveva quarry, shedding light on a previously unknown ecosystem. The discovery provides a unique snapshot of the Cretaceous era and its biodiversity in the Southern Hemisphere.
A University of Michigan researcher has discovered a 310-million-year-old fossil that shows an early innovation in the way fish eat. The Platysomus fish had a toothy, tongue-like apparatus for biting, which was a convergent adaptation among different groups of fishes.
A newly discovered pachycephalosaur fossil from Mongolia's Gobi Desert provides crucial insights into the dinosaur group's growth and development. The 15-million-year-old specimen, called Zavacephale rinpoche, is the oldest and most complete skeleton of this iconic dinosaur group found to date.
A University of Michigan study reveals that the sudden loss of dinosaurs allowed forests to flourish, stabilizing sediments and creating broad meanders in rivers. This change had a profound impact on landscapes, demonstrating how life can alter its environment through catastrophic events.
Researchers in China have dated dinosaur eggs from the Qinglongshan site to be around 85 million years old, shedding light on the Late Cretaceous climate. The new dating method, called atomic clock for fossils, allows for precise measurement of uranium and lead atoms in eggshell samples.
A 242-million-year-old fossil from Devon has provided new insights into the origins of lizards, snakes, and their tuatara relatives. The discovery shows that early lepidosaurs had surprisingly large triangular-shaped teeth, unlike modern lizards and snakes.
Two baby pterosaurs, aged less than 20 cm with broken wings, were found to have died from powerful storms that also preserved hundreds of other fossils. The discovery explains why smaller fossils are well-preserved, as they were a direct result of storms.
Male ghost sharks have a unique forehead appendage with retractable teeth, which are likely used to grasp females during mating. Genetic and fossil evidence confirms the teeth's origin from oral teeth, demonstrating an extraordinary example of tooth development and evolution.
Researchers have developed a method to reconstruct functional diversity of past ecosystems from fossils, enabling conservationists to compare healthy ecosystems with modern counterparts that have been altered by humans. This information can be used to set restoration and protection goals for endangered species.
Researchers discovered a 310-million-year-old fossilized ray-finned fish, Platysomus parvulus, which had a unique 'tongue bite' mechanism to devour prey. This ancient fish's internal anatomy revealed a sophisticated arrangement of tooth plates and gill skeleton, providing insights into the evolution of fish feeding strategies.
Marine animals diversified over 500 million years ago, but oxygen levels didn't reach the ocean floor until later. Thallium isotopes show fluctuations in O2 levels at the ocean floor during the Paleozoic era.
A tiny fossil of a sea creature from over half a billion years ago sheds light on the evolution of arthropods, revealing a brain similar to that of living crustaceans. The discovery suggests that the split between the two largest groups of arthropods was more nuanced and complicated than previously thought.
Fossilized marine invertebrates accurately reflect past ecosystems' functional diversity, offering a powerful tool for understanding long-term ecological change and informing modern conservation efforts. The study supports the growing field of conservation paleobiology by validating the use of functional diversity metrics in fossil data.
A new study tracks the evolution of marine sediment layers across hundreds of millions of years, revealing insights into bioturbation's impact on ocean habitability and ecology. Bioturbation played a critical role in shaping seafloor ecosystems and regulating nutrient cycling.
A team of researchers analyzed sediment cores from the Indian Ocean, revealing that intensive agriculture led to severe soil erosion around 500 years ago. This finding indicates a profound impact of human activities on the environment much earlier than previously believed.
Scientists have discovered new fossils of Australopithecus and Homo coexisting between 2.6 to 2.8 million years ago, shedding light on human evolution. The new species of Australopithecus has been identified as a distinct lineage, challenging traditional views of human origins.
Scientists have discovered a new species of ancient whale, Janjucetus dullardi, from a 26-million-year-old fossil found in Victoria's Surf Coast. The discovery reveals a fast, sharp-toothed predator with a compact body and big eyes.
Scientists reconstructed the brain, heart, and fins of a 400-million-year-old fish called Norselaspis glacialis. The study found that its acute senses and powerful heart evolved well before jaws and teeth, suggesting a fast-swimming lifestyle was key to evading predators.
Fossilized dinosaur teeth contain oxygen isotopes that indicate high carbon dioxide levels in the atmosphere during the Mesozoic Era, which was four to three times higher than today. This data suggests dynamic climates with double primary plant production, contributing to their extinction.
A new species of ancient marine reptile, Plesionectes longicollum, has been identified from Germany's Posidonia Shale fossil beds. The specimen represents a previously unknown type of plesiosauroid and provides significant insights into the evolution of prehistoric ocean ecosystems.
The Smithsonian Tropical Research Institute is digitizing images of pollen from over 18,000 plant species to create a massive database. This dataset will be used to train an AI model to aid pollen identifications, transforming the process into a digital and universally accessible one.
A study of Olenoides serratus trilobite limbs reveals a simpler, functional design than horseshoe crabs, with specialized appendages for walking, burrowing, and mating. The research provides new insights into the behavior and movement of ancient arthropods, offering a rare window into life over half a billion years ago.
A large region of unusually hot rock deep beneath the Appalachian Mountains in the United States could be linked to Greenland and North America splitting apart 80 million years ago. The 'mantle wave' theory suggests that hot, dense rock slowly peels away from the base of tectonic plates after continents break apart.
Researchers create a technique to model organic objects, creating photorealistic 3D images of complex shapes for autonomous sorting. This method improves robotic systems that sort microscopic marine fossils used in climate research.
A team of researchers has discovered that ancient nectocaridids, thought to be cephalopods, are actually an early descendant of arrow worms. This finding reveals complex predators in the food chain and sheds light on the evolution of these creatures.
The discovery of exceptionally preserved early animals in the Grand Canyon sheds new light on the evolution of life during the Cambrian period. The fossils, dating back 507-502 million years, reveal complex feeding styles and unique adaptations, including hair-like extensions on crustacean bodies.
Researchers found that different species of dinosaurs had distinct preferences for plant parts, including leaves, buds, and woody tissues. This discovery helps explain how so many large herbivores coexisted in the same ecosystem without competing for resources.
A new analysis of a 500 million-year-old fossil suggests that arachnids, including spiders and scorpions, evolved in the ocean before adapting to land. The discovery was made by studying the brain and nervous system of an ancient marine arthropod called Mollisonia symmetrica.
A conclave of paleontologists, data scientists, and journal editors will meet in Kansas to improve how data is shared among professionals and beyond. The event aims to align paleontological data with FAIR practices, making it easier for researchers to access and reuse.
Researchers at the University of Missouri have confirmed a more nuanced view of the Mazon Creek fossil site, using modern data analysis techniques to assess paleoenvironmental and taphonomic nature. The study reveals three identifiable paleoenvironments, including transitional habitats between nearshore and offshore zones.
Two Neanderthal groups living in Amud and Kebara caves in northern Israel butchered the same prey using similar tools but with distinct patterns of cut-marks on animal bones. These differences could represent cultural food practices such as drying or aging meat before butchering, which were passed down through generations.
Researchers at UNICAMP found that a reduction in prey availability was a decisive factor in the extinction of saber-toothed tigers. The study also shows that an increase in predator diversity led to a decline in herbivore species diversity among antilocaprids, which are now represented by a single species: the American bison.
A previously unknown genus and species of Pliocene mole, Vulcanoscaptor ninoti, has been identified in southern Europe. The fossil provides valuable insights into the evolutionary history of talpids and suggests past transcontinental migrations of moles.
Scientists reconstructed ocean pH levels 201 million years ago and found a massive drop in acidity, leading to mass extinction. The research links this event to volcanic activity and a significant increase in atmospheric CO2.
A University of Portsmouth student has discovered a new species of prehistoric mammal, Novaculadon mirabilis, dating back 145 million years. The fossilized jaw features distinctive teeth and provides insights into early mammals that lived alongside dinosaurs.
A Smithsonian-led team has discovered North America's oldest known pterosaur, dating back to the late Triassic period around 209 million years ago. The fossilized jawbone of the new species was found alongside hundreds of other fossils, including a turtle with spike-like armor and an ancient frog relative.