Articles tagged with Paleobiology
Researchers analyzed the teeth of four European straight-tusked elephants, discovering they migrated up to 300km before reaching their final habitat. The study suggests organized hunting and cooperation between Neanderthals and the elephants.
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.
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.
A new comprehensive study reveals that modern afforestation in Europe is contrary to the continent's long-term ecological trajectory. The study suggests that dense forests are a recent phenomenon and that current reforestation practices are on the wrong track, harming biodiversity.
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.
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.
Researchers from OIST found that the Late Ordovician Mass Extinction drove an unprecedented richness of vertebrate life, with gnathostomes dominating all others. The study linked the mass extinction pulses to increased speciation after millions of years, highlighting their role in shaping the evolution of vertebrates.
A team of international scientists led by Dr M. Eleonora Rossi from the University of Bristol reconstructed sponge skeleton evolution, finding that spicules evolved independently in different groups. This discovery challenges previous estimates of sponge origin and sheds light on early animal diversification.
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.
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 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.
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.
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.
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.
A new study reveals that Dunkleosteus was an oddball among ancient armored fishes, with a cartilage-heavy skull and unexpected feeding behavior. The research places Dunkleosteus in proper evolutionary context, highlighting the diversity of arthrodire groups.
A team of scientists has discovered chemical evidence of ancient life in 3.3 billion-year-old rocks, doubling the window of time for detecting organic molecules that reveal information about original organisms. The study also found molecular signs of photosynthesis dating back over 800 million years earlier than previously documented.
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.
Research found that sharks with specialized physiologies and ecological roles are most threatened with extinction. Losing these species would diminish trait diversity, leading to a more boring world with less diversity of forms. The study suggests that overfishing is the single biggest driver of shark population decline.
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 propose a new model for Earth's oxygenation, finding that high nickel and urea concentrations kept cyanobacterial blooms rare. As these compounds became available at lower levels, they drove the expansion of cyanobacteria, leading to long-term oxygen release and the Great Oxidation Event.
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.
A 2023 MSU graduate's undergraduate research project uncovered a new, 95-million-year-old crocodyliform named Thikarisuchus xenodentes. This tiny creature lived on land, feasting on plants and insects, with unique teeth that shed light on ancient ecosystems and evolutionary patterns.
Researchers have uncovered microbial DNA in woolly and steppe mammoth remains dating back over 1 million years, identifying bacteria possibly causing disease in mammoths. The findings provide an unprecedented glimpse into the microbiomes of extinct megafauna.
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.
New research reveals that ancient ocean oxygenation drove diversification among jawed vertebrates. The study found two oxygenation events occurred in deeper waters, one lasting from the Middle Devonian period to present, and suggests oxygen played a key role in shaping evolutionary patterns.
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.
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.
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.
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.
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.
Researchers from Harvard University have discovered ancient proteins in the enamel of 18-million-year-old fossilized mammals from Kenya's Rift Valley. The study uses a new proteomics technique to reveal a diversity of proteins in different biological tissues, providing insights into the lives and evolution of these ancient animals.
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 groundbreaking study of 7000-year-old fossilized coral reefs reveals that human fishing has transformed Caribbean reef food webs. Shark populations have declined by 75%, while prey fish species have doubled in abundance and grown 17% larger on modern reefs.
Stanford researchers measured biomass of ocean life over the past half-billion years, finding a generally increasing trend. The study aligns with evidence for a rise in marine biodiversity and suggests an evolutionary connection between biomass and biodiversity.
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.
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.
New research finds megalodon preyed upon a variety of species, including fish, sharks, and even crustaceans, contrary to the long-held belief that it targeted large marine mammals. The discovery was made by analyzing zinc isotopes in fossilized teeth, providing insights into the prehistoric shark's ecological versatility.
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.
Researchers found that ancient Homo sapiens used tailored clothing and ochre-based sunscreens to protect themselves from harmful UV light during the Laschamps excursion. This period of reduced magnetic field strength allowed more cosmic radiation to reach Earth's surface, potentially contributing to the decline of Neanderthals.
A 131-million-year-old pregnant ichthyosaur named Fiona has been studied for her well-preserved skeleton, which provides details about the anatomy of these marine predators. The researchers also found evidence of her final meal and a healed injury in her fin bones.
University of Leicester researchers use UV torches to reveal tiny details distinguishing Pterodactylus from other fossils, uncovering nearly 50 'hidden' relatives and reconstructing its life history from hatchling to adulthood.
Researchers at Uppsala University analyzed fossilized feces of dinosaurs, revealing undigested food remains and plants, which helped recreate the structure of ecosystems during the Late Triassic period. The study suggests that early herbivorous dinosaurs' love for plant shoots was crucial to their evolutionary success.
A team of researchers discovered fossil amphibians preserved in cylindrical burrows in Wyoming, providing insights into their adaptation to extreme seasonal conditions. The ancient creatures, about a foot long, had underdeveloped arms and likely used their heads to dig burrows during the dry season.
Researchers have discovered a remarkably well-preserved fossil bird from the Mesozoic Era, which has been digitally reconstructed to reveal its brain structure. The discovery, named Navaornis hestiae, fills a 70-million-year gap in our understanding of how birds evolved and provides insights into their cognitive abilities.
A new study offers insight into how some colony-forming animals, like ants or bees, may have evolved their own system for divvying up work millions of years ago. Bryozoans, small aquatic animals, discovered to have evolved unique abilities after losing feeding ability, survived by sharing resources with other members of the colony.
Researchers found that thalattosuchian sinuses reduced during semi-aquatic phases and then diminished further as they became fully aquatic. This allowed them to develop extracranial sinuses, which might have helped drain salt glands and alleviate 'encrustation' problems.
A team of researchers has unveiled a spectacular new fossil arthropod named Lomankus edgecombei, preserved entirely in fool's gold. The specimen belongs to a group called megacheirans, which were thought to be extinct during the Ordovician Period.
Scientists discovered two new species of predatory birds in the Hell Creek Formation, which lived alongside dinosaurs like T. rex 68 million years ago. The fossils indicate that these birds could have hunted small mammals and baby dinosaurs using their powerful foot bones.
A team of researchers discovered that a 'tag-team' between the oceans and continents led to severe environmental crises, causing mass extinctions of marine species. The study found that chemical weathering pulses disrupted the oceans, leading to anoxic events that had profound impacts on marine ecosystems.
A team of sedimentologists and stratigraphers found that gap regularity, not incompleteness, determines evolutionary history reconstruction. Incompleteness can be overcome with geological knowledge, enabling accurate reconstruction of evolution hundreds of millions of years ago.
Scientists at the University of Malaga have uncovered a natural quicksand trap in the 'elephant graveyard' of Orce, dated to over 1.4 million years ago. The discovery provides insights into human presence in Western Europe and competition with large carrion hyenas for meat resources.
A new species of extinct crocodile relative, Benggwigwishingasuchus eremicarminis, has been discovered in Nevada, USA. The species reveals that pseudosuchian archosaurs ruled the shores across the Middle Triassic globe between 247.2 and 237 million years ago.
The newly discovered Lokiceratops rangiformis is a massive horned dinosaur found in the badlands of northern Montana. It boasts two enormous blade-like horns on its frill, as well as an asymmetric spike, making it one of the most ornate species ever found.
Lokiceratops rangiformis, a plant-eating dinosaur with large horned frill and asymmetrical caribou-like antlers, has been discovered in Montana. The species' unusual features may have played a role in mate selection or species recognition.
Scientists discovered a bizarre arachnid with up-armored legs in the Mazon Creek locality in Illinois, dating back to the Carboniferous period. The fossil, named Douglassarachne acanthopoda, has a unique body plan that defies categorization into known arachnid orders.
Researchers have reconstructed the mouth of an ancient jawless fish using CT scanning techniques, suggesting it was a filter-feeder rather than a scavenger or hunter. The study reveals that early vertebrates had a diverse range of feeding behaviors before jawed animals evolved.
A new study has analyzed fossil records of marine invertebrates over the past 485 million years, identifying key traits that affect resilience to extinction. The research suggests that species with restricted thermal ranges are at greatest risk, and global biodiversity faces a harrowing future.