Articles tagged with Fossils
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.
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.
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 have identified a new species of ancient symbiotic fungus preserved within a 407-million-year-old plant fossil from Scotland. The discovery provides unprecedented three-dimensional insight into one of the earliest known plant–fungus partnerships, known as mycorrhiza.
Chameleons have two long, coiled optic nerves that enable their remarkable ability to look in two different directions at once. Researchers used CT scanning technology to visualize the hidden structure, revealing a unique trait not seen in any other lizard.
Researchers analyzed sediment cores from three sites in the Arctic, finding that year-round ice coverage corresponded with less cosmic dust. This study suggests that tracking cosmic dust can help predict changes to sea ice coverage and understand warming trends.
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.
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 new fossil discovery confirms Nanotyrannus as a distinct species from Tyrannosaurus rex, challenging decades of research on T. rex growth. The fossil reveals that Nanotyrannus was physically mature at age 20 and had distinct skeletal features incompatible with T. rex.
Researchers uncovered the oldest known complex three-dimensional burrow systems in Hubei's Shibantan Biota, dating back approximately 550 million years. These trace fossils show that complex animal behaviors emerged nearly 10 million years earlier than previously thought.
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.
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 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.
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.
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.
A reanalysis of the one-million-year-old Yunxian 2 skull from China suggests a new branch in the human family tree and a possible link to Denisovans. The study proposes that the split between modern humans, Neanderthals, and this Asian clade occurred much earlier than previously thought.
The study proposes a clear, four-stage sequence showing how chewing and hearing functions were gradually split between jaw and ear. The discoveries of unique jaw joints in fossil specimens reveal multiple independent origins for jaw joint types and expand our understanding of mammalian evolution.
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.
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.
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.
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.
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.
UNLV anthropologist Brian Villmoare and an international team discovered new fossils in Ethiopia that indicate Australopithecus and Homo species coexisted between 2.6 and 2.8 million years ago. The findings suggest a more complex tree-like pattern of human evolution, challenging the traditional linear model.
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 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 study of fossil teeth from a 56-million-year-old extinct predator reveals how animals adapted to extreme climate change. The findings suggest that limited food played a bigger role in the dietary shift than just hotter temperatures.
Researchers mapped the range of movement in Olenoides serratus trilobite limbs, shedding light on their behavior and function. The study revealed a simpler, functional limb design with limited extension range, allowing them to walk, burrow, and forage.
The discovery of Palaeocampa anthrax, an armored freshwater lobopodian, reveals new insights into early animal evolution and the diversity of ancient ecosystems. The fossil's analysis confirms its status as a nonmarine species, predating previously known marine lobopodians by nearly fifty years.
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 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 discovered that approximately 436-million-year-old brachiopods formed a non-random, checkerboard-like pattern due to their tiny setae, which allowed them to maintain optimal spacing. This study provides rare evidence of ancient communities being shaped by biological interactions.
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.
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.
Recent advances in molecular clock models and paleontological discoveries suggest many bird lineages originated during Late Cretaceous period. This early diversification coincided with the Cretaceous Angiosperm Terrestrial Revolution, a pivotal phase of terrestrial ecosystem restructuring.
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.
Researchers developed a new way to analyze fossils, providing a day-by-day understanding of how prehistoric plankton adapted to their environment. The study revealed that temperature was a key factor in growth rates, with some species thriving in higher temperatures.
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 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 nearly complete fossil of Westlothiana lizziae, a four-legged creature, has been dated to 346 million years ago, shedding new light on the evolution of amphibians, birds, reptiles, and mammals. This age places the specimens in Romer's Gap, a pivotal time period where water-dwelling fish transitioned to land animals.
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.
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.
New research finds that Australopithecus sediba and Homo naledi used their hands for both tool use and climbing, with distinct patterns of finger bone structure indicating different grip types. The study reveals varying levels of dexterity and climbing abilities among ancient human relatives in South Africa.
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.
Researchers have discovered a remarkable new 506-million-year-old predator called Mosura fentoni from the Burgess Shale of Canada. The species has a unique body region made up of multiple segments at its back end, similar to modern groups like horseshoe crabs and insects. The discovery provides key insight into ancestral traits for art...
A study of oyster fossils from the Early Cretaceous period reveals significant seasonal temperature fluctuations and periodic glacial melt events, overturning the traditional view of greenhouse climates. The findings suggest that elevated greenhouse gas concentrations may amplify seasonal extremes rather than lead to uniform warming.
Researchers used CT scanning to study decomposing zebrafish without altering the natural decay process, providing unprecedented insights into fossil formation. The non-invasive technique allows scientists to monitor decay in real-time, including the buildup of decomposition gases within internal cavities.
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 uncovered fossilized leaves of the Kapur Paya tree, a towering dipterocarp species, at least two million years old. This discovery provides new insights into the ecological importance and historical significance of these forests, emphasizing the need for conservation.