Articles tagged with Paleontology
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.
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 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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
A new study reveals that forests take 1-2 centuries to shift tree populations in response to climate changes, highlighting the need for human intervention to keep them healthy. Assisted migration, such as planting warmer-climate trees in colder locations, may be an effective tool to aid forest adaptation.
Researchers have discovered hundreds of previously hidden fossilized squid beaks using a novel 'digital fossil-mining' approach. The findings indicate that squids originated around 100 million years ago and rapidly diversified thereafter, suggesting they played a key role in shaping modern ocean ecosystems.
Researchers analyzed fossil and living animal bones to reconstruct the path to upright posture, finding bursts of innovation and adaptive radiations. The study suggests that fully parasagittal postures evolved relatively late in mammalian history, contradicting previous theories.
Researchers have uncovered a new species of Swaindelphys, a large metatherian that lived around 60 million years ago in Texas' Big Bend National Park. The species, dubbed Swaindelphys solastella, is significantly larger than similar species known from the same period.
A new species of dinosaur, Khankhuuluu, is described as the closest-known ancestor to the giant Tyrannosaurs. It was a mesopredator that used speed and agility to take down its prey.
A new species of pterosaur, Nipponopterus mifunensis, has been discovered in Japan, providing crucial insight into the diversity and evolution of pterosaurs in East Asia. The fossil, found in the Mifune Group geological formation, features striking characteristics not seen in any previously known species.
A recent study published in Current Biology found that sauropods, a type of herbivorous dinosaur, relied heavily on their gut microbes for digestion. The analysis of plant fossils in the dinosaur's gut suggests that they engaged in minimal oral processing and instead ate bulk feeders.
A new study reveals that large herbivores' ecosystems stayed remarkably stable over long periods of time, with only two major global shifts causing significant changes. The first shift occurred around 21 million years ago, while the second shifted 10 million years ago, leading to a decline in functional diversity.
A team of scientists analyzed fossilized clams and mussels to understand how ecosystems recover from mass extinctions. They found that despite 75% species loss, ecological niches remained occupied, contradicting prevailing theories.
The study reveals that the crystallographic characteristics of dinosaur egg SEUs are identical to those of PEUs and modern bird eggshell units, suggesting a biogenic origin. The researchers also discovered grooves and vesicles in SEUs, consistent with organic matrix fiber degradation during fossilization.
A study of ancient genomes from Yunnan, China, has provided new insights into human prehistory in East Asia. The research found that the region is pivotal to understanding the origin of both Tibetan and Austroasiatic population groups, with a previously unobserved Asian ancestry denoted as Xingyi ancestry.
Scientists discovered a genetic change in Yersinia pestis that may have prolonged the duration of two major pandemics. The mutation, which reduces virulence, enables the bacteria to infect individuals for longer periods, potentially spreading farther in less densely populated environments.
A collection of fossils discovered in northern Alaska reveals that birds were nesting in harsh Arctic environments as early as 72.8 million years ago. This finding provides new insights into how modern birds adapted to polar ecosystems and offers clues about their evolutionary history.
Scientists have discovered that leprosy, caused by bacteria Mycobacterium lepromatosis, has been infecting humans in the Americas for at least 1,000 years. The study analyzed DNA from ancient human remains and recent clinical cases, confirming that the disease was already widespread in North and South America before European colonization.
Scientists have discovered fossils of multiple bird species in the Arctic, including diving birds and gull-like birds, that were breeding during the time of the dinosaurs. The findings push back the known record of birds nesting in polar regions by 25-30 million years.
A team of palaeontologists from Fundación Dinópolis has discovered a partial stegosaurian skull in Spain, revealing previously unknown aspects of the species' anatomy. The find has led to the proposal of a new evolutionary hypothesis and the definition of a new group called Neostegosauria.
A recent study has discovered that cold-adapted species began evolving 2.6 million years ago, with many modern species emerging around 700,000 years ago. The research provides insights into the evolution of Arctic ecosystems and highlights the importance of understanding past adaptations to inform conservation efforts.
A group of elasmosaur fossils has been formally identified as belonging to a new genus, Traskasaura sandrae. This ancient marine reptile, measuring 12 meters long and having heavy, sharp teeth, likely hunted prey from above using its strong swimming capabilities.
Scientists analyzed ancient DNA, fossil shape, and habitat data to determine the factors influencing the size of extinct giant ground sloths. The result shows that size differences among sloths have been primarily influenced by the types of habitats they lived in and climate change.
Researchers found that sloths' body size was largely influenced by their habitats, and human activities led to the rapid decline of large-bodied species. The study suggests that secluded forest canopies allowed small arboreal sloths to survive, while direct human pressures drove the extinction of giant terrestrial sloths.
New research from the University of Chicago reveals that dentine, the inner layer of teeth, first evolved as sensory tissue in ancient fish. Fossil studies confirm that early vertebrates used sensory organs in their armor to sense conditions in the water, similar to modern arthropods.
A new study published in Marine Ecology Progress Series reveals that seagrass ecosystems along Florida's Nature Coast have remained relatively healthy over the last several thousand years. The research, conducted by conservation paleobiologists, used fossilized mollusk shells to infer ecosystem health and found that these communities a...
The study provides crucial insights into the evolution of the skull and adaptations for flight in the critical transition from non-avian dinosaurs to birds. The Chicago Archaeopteryx specimen reveals an almost completely preserved skull with a palatal region intermediate between troodontids and more derived Cretaceous birds.
A joint Chinese-American research team has discovered the smallest known Archaeopteryx specimen, acquired by the Field Museum in 2022. The study provides crucial insights into the evolution of the skull and adaptations for flight during the transition from non-avian dinosaurs to birds.
A new study combines Indigenous knowledge systems with Western genomics to uncover how megafauna were impacted during a period of substantial habitat change. Repeated trans-Beringian horse migrations between 50,000 and 13,000 years ago revealed genetic exchanges occurring in both directions.
Newly discovered fossil tracks in Australia indicate that reptiles originated on land around 350 million years ago, pushing back their evolution by 35-40 million years. This discovery provides significant insights into the early evolution of tetrapods and challenges previous records of their emergence.
A new species of ancient tree frog, Litoria tylerantiqua, has been discovered in Australia, challenging previous estimates of when Australian and South American tree frogs separated. The fossil record indicates that the separation occurred approximately 22 million years ago, rather than 33 million years ago as previously thought.
Researchers have made new discoveries about the ancient bird Archaeopteryx, including its ability to fly and its evolutionary history. The Chicago specimen, a well-preserved fossil found in Germany, provides insights into the species' cranial kinesis and soft tissues, challenging previous assumptions about its behavior.
A team of scientists has discovered a prehistoric tegu fossil in the US, revealing that these charismatic lizards were once native to North America. The fossil, dated to the Middle Miocene Climatic Optimum, is believed to have been present in present-day Georgia during a warm period, before global temperatures cooled and they disappeared.
Scientists have named a new species of fish from the Cretaceous Period, Sivulliusalmo alaskensis, which is the oldest salmonid in the fossil record. The discovery provides insight into the evolutionary history of the salmon family and suggests that they likely originated in the North.
A new study from the University of Helsinki unravels the causes of ancient climate changes that led to severe droughts in North America thousands of years ago. Researchers used fossil pollen grains and machine learning algorithms to reconstruct moisture levels, confirming that conditions were below modern levels for thousands of years.
The PteridoPortal is an online repository of fern and lycophyte information, allowing researchers to access digitized specimens from 35 herbarium collections. This project has significantly impacted biodiversity research, enabling scientists to inventory species in Colombia and other countries.
The study suggests that T. rex and its cousins may have been better suited to cooler climates due to having feathers or a more warm-blooded physiology. The team found that megaraptors, a closely related group, were more widely distributed across the globe than previously thought, originating in Asia about 120 million years ago.
A recent study analyzed body size evolution in trilobites, a highly representative group of fossil invertebrates, and found that marine oxygen levels significantly influenced their body size. The research highlights the long-term impact of oxygen on the evolution of early metazoans.
A new study analyzed phylogenetic relationships and predatory capabilities of Cretaceous marine reptiles, finding elevated rates of extinction targeting large and fast predators. The Cenomanian-Turonian transition, with high carbon dioxide concentrations and ocean anoxia, was associated with distinct bite force and species diversification
A study from the University of Lausanne reveals that larger animals and those with higher protein content tend to create reducing conditions more rapidly, which slow down decay and trigger fossilization. This explains why some ancient fossils are dominated by arthropods and others remain lost to time.
A study by the University of Leicester has successfully linked fossilised footprints to distinct groups of pterosaurs, shedding light on their lifestyles and behaviors. The discovery supports the idea that pterosaurs underwent a major ecological shift during the middle part of the Mesozoic era.
LMU researchers recreated the first metabolic process of life on Earth, using iron and sulfur reactions to produce energy. The single-celled organism Methanocaldococcus jannaschii grew exponentially, utilizing hydrogen gas as an energy source.