The specimen is remarkable not only for its novelty as a species but also because it is the first dinosaur fossil found in Korea in 15 years to include parts of its skull — an element seldom discovered due to the difficulty of fossil preservation in the region’s geology. The fossil, unearthed on Korea’s Aphae Island, was subjected to cutting-edge micro-computed tomography (micro-CT) scanning at The University of Texas High-Resolution X-ray Computed Tomography (UTCT) facility, revealing a trove of anatomical details previously obscured by the encasing rock matrix.

Initial visual examination of the fossil suggested only a handful of leg bones and vertebrae were preserved. However, the micro-CT scans shattered these expectations, unveiling substantial portions of the skull and numerous small bones concealed within the hard rock. This allowed researchers to conduct a comprehensive anatomical analysis that would have taken nearly a decade to accomplish by conventional mechanical preparation alone.

Doolysaurus huhmini lived approximately 113 to 94 million years ago during the mid-Cretaceous period, a pivotal epoch marking significant evolutionary radiations among dinosaurs and other terrestrial vertebrates. The species is classified as a thescelosaurid, a group of relatively small-bodied, bipedal ornithischians known to inhabit East Asia and North America. Thescelosaurids are of particular interest to paleontologists because many are hypothesized to have had a primitive, fuzzy integument, and Doolysaurus may well have sported such a filamentous covering — evocative of a juvenile bird or a lamb-like appearance.

The fossil specimen represents a juvenile estimated to be about two years old at the time of death and approximately the size of a modern turkey. Growth markers visible on a microscopic thin section of the femur verified its ontogenetic stage, emphasizing that Doolysaurus had not yet reached full adult size, which scientists project could have been roughly double that of the specimen examined.

Beyond the skeletal remains, a cluster of gastroliths — small stones swallowed during the animal’s life — was found within the fossilized torso. These stones played a crucial role in digestion, indicating that Doolysaurus was omnivorous, feeding on a varied diet of plants, insects, and small animals. The presence of gastroliths in situ was one of the reasons the research team suspected additional fossilized material might be preserved inside the matrix, prompting the detailed micro-CT scanning.

The implementation of micro-CT technology marked a critical methodological advancement in this discovery. Traditionally, excavation and preparation of dinosaur fossils embedded in dense rock is painstakingly slow and carries a significant risk of damaging delicate features. Non-destructive imaging allowed the researchers to explore the internal fossil layout virtually, enabling targeted study without physical interference. Julia Clarke, professor at the Jackson School of Geosciences, underlined the transformative impact of CT scanning in paleontology — particularly for examining fragile fossils obscured by tough lithologies, including small non-avian dinosaurs and early birds.

This discovery not only enriches the known diversity of neornithischians but also highlights Aphae Island as a significant yet underexplored fossil frontier. While South Korea has long been renowned for fossilized dinosaur tracks, nests, and eggs, actual bone fossils have been scarce and difficult to extract from hard rock substrates. The Doolysaurus fossil suggests that further finds may be concealed underground, awaiting modern imaging technologies to unlock their secrets.

Co-lead researchers Jongyun Jung and Hyemin Jo emphasize their plans for future expeditions back to Aphae Island with hopes of uncovering additional specimens. The integration of skills in CT scanning and fossil analysis, honed at UT Austin’s Jackson School, sets a new standard for Korean paleontology research. The team’s multidisciplinary collaboration exemplifies how global scientific partnerships can accelerate discoveries and deepen understanding of prehistoric ecosystems.

The dedication of this new species to both a cherished cultural figure and a venerable scientist bridges popular culture with rigorous science, inspiring public interest and deepening appreciation for Korea’s ancient natural heritage. The scientific report detailing Doolysaurus huhmini was published in the journal Fossil Record on March 19, 2026, sparking discussions about the evolution, ecology, and paleobiogeography of early neornithischian dinosaurs across Asia and North America.

In the coming years, advancements in imaging, field exploration, and analytical techniques promise a renaissance in Korean dinosaur paleontology. The Doolysaurus find stands as a testament to the power of innovative technology and international cooperation to illuminate chapters of Earth’s distant past long hidden beneath rock and time.

Subject of Research: New dinosaur species discovery and early-diverging neornithischian diversity

Article Title: A new dinosaur species from Korea and its implications for early-diverging neornithischian diversity

News Publication Date: 19-Mar-2026

Image Credits: Janet Cañamar, adapted from Jung et al 2026.

Keywords: Paleontology, Fossils, Dinosaurs, Dinosaur fossils, Vertebrate paleontology, Earth sciences, Tomography

The research team employed cutting-edge 3D surface scanning and micro-computed tomography (microCT) to digitize and analyze the fossilized hand bones with remarkable precision. Using a HDI Advance 3D scanner, T. Gichunge conducted meticulous surface scans immediately following excavation and specimen preparation. Subsequently, microCT scanning was completed at Stellenbosch University’s CT Scanner Facility, leveraging a General Electric Phoenix VTOMEX L240 to achieve scan resolutions between 15 and 50 microns. These high-resolution imaging techniques facilitated detailed visualization of internal and external bone structures, crucial for interpreting morphological nuances.

A significant focus was placed on dental metrics, specifically enamel thickness and crown morphology of maxillary and mandibular molars. The unworn third molars (RM3) were virtually sectioned at the enamel-dentine junction (EDJ) using Avizo software, revealing precise enamel cap areas. Despite minor fractures in the enamel caps, the researchers employed innovative correction methodologies, including curvature-based estimations, to compute average enamel thickness (AET)—critical for contextualizing dietary adaptations within the Paranthropus lineage. These enamel measurements, combined with linear dental dimensions gathered via high-accuracy dial calipers, were compared against extensive hominin dental datasets to establish functional affinity.

Beyond dental analysis, the hand skeletal anatomy was subjected to comprehensive morphometric scrutiny. Measurements spanning metacarpals and phalanges were systematically recorded and benchmarked against both extant primate taxa and fossil hominin specimens. Notably, the partial preservation of the first manual proximal phalanx (mPP1) necessitated an innovative estimation of its total length. By leveraging robust correlations evident in extant Homo sapiens, Pan, and Gorilla samples, a least squares regression model guided the extrapolation of missing phalangeal dimensions. This approach underscored the integration of comparative anatomy and statistical modeling in paleoanthropological reconstructions.

The first metacarpal’s proximal articular surface was analyzed through principal curvature quantification in dorsopalmar and radioulnar directions. A quadric surface fit revealed curvature values indicative of saddle-shaped morphology consistent with hominid adaptations for manual dexterity. The curvature parameters were rigorously compared with those of extant and fossil taxa, elucidating evolutionary trends in carpal-metacarpal joint shape aimed at manipulative function and load distribution.

In parallel, canonical variate analyses unraveled the shape configurations of key carpal bones, including the trapezoid, scaphoid, and lunate. The trapezoid facet geometry was characterized by angular relations between articular surfaces and normalized surface area ratios, drawing on least-squares planar approximations. For the scaphoid, an advanced 3D geometric morphometric framework was employed, combining a dense array of landmarks and sliding semi-landmarks to capture subtle shape variations. Subsequent Procrustes alignment and principal component analyses distilled the morphological signal, situating KNM-ER 101000 within the broader spectrum of hominoid wrist morphology.

Integration of scaphoid and lunate shapes in matched pairs further refined the functional narrative of midcarpal joint evolution in Paranthropus. This combined analysis revealed nuanced variations in joint congruency and mobility potentials that are tightly linked to locomotor and manipulative behaviors. Meanwhile, the hamate’s biomechanical form was quantified through landmark-based variables reflecting grasping mechanics, highlighting adaptations pertinent to tool-use and forceful prehension.

The forearm morphology, particularly the radius’ cross-sectional geometry, was also scrutinized. Cortical area measurements taken at the 25% physiological length mark provided comparative insights into biomechanical loading regimes among hominins and extant apes. Utilizing CT scans of modern human, chimpanzee, and gorilla radii, segmented images analyzed via BoneJ in ImageJ software facilitated rigorous evaluation of cortical robustness, an indicator of habitual manual function and mechanical stress adaptation.

Furthermore, pedal traits were analyzed with equal rigor to infer locomotor patterns. The hallux proximal phalanx, a critical element for bipedal stability and grasping, was digitally reconstructed from diverse CT imaging repositories and scanned datasets. Parameters such as dorsal canting angle—the inclination between the proximal articular surface and the plantar base plane—were calculated to compare Paranthropus foot morphology with extant primates. Length ratios among pedal phalanges and curvature measurements informed on foot biomechanics, suggesting degrees of arboreal versus terrestrial adaptation.

The third metatarsal’s torsion angle was meticulously quantified through a novel 3D landmark-based method integrating six anatomically defined points to establish local coordinate axes. This enabled precise calculation of torsional rotation at the tarsometatarsal joint, critical for understanding midfoot rigidity and propulsion mechanics. Comparative analysis against multiple hominin and primate taxa placed KNM-ER 101000 within a functional continuum reflecting locomotive evolution.

Complementing morphological assessments, ancestral state reconstruction employed a discrete character matrix encompassing 20 key manual traits. By coding these characters across six extant species and 14 fossil taxa, and applying maximum parsimony on a robust phylogenetic topology, the research delineated the evolutionary trajectory of manual adaptations. This phylogenetic approach illuminated the emergence of derived traits within Paranthropus and their divergence relative to both earlier and contemporary hominins.

The comprehensive fusion of high-resolution imaging, morphometric sophistication, and phylogenetic inference established a compelling narrative: the Paranthropus boisei hand displays a mosaic of primitive and derived traits, resonating with increased manipulative capabilities previously underestimated in this robust australopith. These findings have profound implications for interpreting the ecological niches occupied by Paranthropus and reconsidering their role within hominin adaptive landscapes.

This research heralds a paradigm shift, emphasizing the importance of hand functionality in defining hominin evolutionary pathways beyond cranio-dental adaptations alone. As the most complete hand material attributed to Paranthropus boisei to date, the KNM-ER 101000 specimen provides an unparalleled window into the morphology that accompanied dietary, locomotive, and potentially technological innovations during a critical juncture in human evolution.

By merging advanced imaging modalities, geometric morphometrics, and evolutionary modeling, the study not only refines the morphological repertoire associated with Paranthropus but also sets a new standard for integrating fossil evidence into functional and evolutionary discourse. Future excavation and analytical endeavors may build upon this framework, enriching our understanding of hominin diversity and the origins of human manual dexterity.

Subject of Research:
New fossil hand anatomy of Paranthropus boisei elucidating manual functional morphology and evolutionary adaptations.

Article Title:
New fossils reveal the hand of Paranthropus boisei.

Article References:
Mongle, C.S., Orr, C.M., Tocheri, M.W. et al. New fossils reveal the hand of Paranthropus boisei. Nature (2025). https://doi.org/10.1038/s41586-025-09594-8

Image Credits: AI Generated

The significance of this specimen extends beyond its pristine condition. Archaeopteryx has long been heralded as a pivotal transitional form linking non-avian dinosaurs and modern birds, but this find presents an unparalleled opportunity to investigate the complex shifts in skeletal morphology and feather evolution. The data extracted illuminate the gradual acquisition of flight, one of the most consequential adaptations in vertebrate history, through a detailed examination of both bone structure and plumage arrangement.

A standout feature revealed by micro-CT imaging is the ventrolaterally exposed skull, which displays palatal characteristics that appear intermediate between derived troodontids and more crownward Cretaceous birds. This novel insight suggests that Archaeopteryx possessed a cranial morphology bridging two major theropod groups, offering key evidence of how cranial architecture was reshaped during the origins of flight. Unlike its non-avian dinosaur ancestors, the skull of Archaeopteryx exhibits modifications consistent with a trend toward increased cranial flexibility, perhaps facilitating enhanced feeding mechanics or sensory capabilities.

Extending from this, the specimen’s vertebral column comes into astonishing detail, revealing paired proatlases — small accessory bones associated with the skull’s articulation — that were previously unknown in Archaeopteryx. Also noteworthy is the recognition that its tail was considerably longer than earlier fossil interpretations suggested. This elongated tail would have had significant biomechanical implications, potentially affecting balance and flight dynamics, and painting a more nuanced picture of the locomotive strategies employed by these early birds.

The exceptional preservation also permitted observation of integumentary structures previously debated among scientists. Skin impressions along the right major digit of the hand indicate that the minor digit was not merely reduced and immobile but was, in fact, free and distally mobile. This challenges earlier reconstructions that posited a rigid and functionally limited hand anatomy, opening fresh avenues for understanding manipulative abilities and wing articulation in basal avians.

Another intriguing anatomical revelation centers on the morphology of the foot pads. Detailed impressions suggest that Archaeopteryx was adapted for terrestrial locomotion rather than raptorial predation. The padded structure of the foot implies a gait suited for walking on firm ground, contrasting with the pedal specializations seen in modern birds of prey. Such an ecological insight helps refine previous conjectures about the lifestyle of Archaeopteryx, indicating a more ground-oriented existence alongside its aerial capabilities.

Perhaps most strikingly, this specimen preserves specialized inner secondary feathers, identified as tertials, on both wings. These feathers are absent in closely related non-avian dinosaurs, underscoring their unique evolutionary origin within Avialae. The presence of humeral tertials in Archaeopteryx contributes directly to a continuous aerodynamic surface necessary for efficient flight. This structural feature likely played a crucial role in flight mechanics, possibly improving lift and maneuverability in early birds.

The discovery of humeral tertials being absent in near relatives but present in Archaeopteryx underscores an important evolutionary milestone: a mosaic emergence of flight adaptations rather than a sudden, single-step shift. The evolutionary narrative that arises is one of gradual transformation where skeletal and feather features co-evolved to form the sophisticated flying apparatus characteristic of modern birds.

This specimen therefore fills a critical gap in our understanding of the bauplan — the fundamental structural design — of early birds. It reveals that Archaeopteryx was not a simple evolutionary intermediate but rather bore a unique combination of ancestral dinosaurian and derived avian traits, illustrating a complex evolutionary mosaic. This explains why Archaeopteryx continues to be a touchstone taxon in studies of avian origins, contextualizing its ecological role and morphological innovations in unprecedented detail.

By refining ecological predictions, these findings also prompt reevaluation of how early birds interacted with their environments. The integration of skeletal flexibility, feather arrangement, and pedal adaptations suggests a multi-faceted lifestyle that balanced terrestrial foraging with emergent flight abilities. Such nuanced reconstructions of early avian behavior enrich our broader understanding of Mesozoic ecosystems.

The study sets a new standard for the application of modern imaging techniques to fossils, demonstrating how micro-CT driven preparation can reveal concealed morphological data without destructive intervention. This approach exemplifies the power of technological advancement in paleontology, allowing researchers to push back the limits of what can be discerned from fossils and reconstruct the evolutionary past with ever-increasing precision.

In sum, the nearly complete 14th specimen of Archaeopteryx from Chicago constitutes a landmark in paleontological research. It advances our knowledge about the origin and evolution of flight, revealing a dynamic interplay of skeletal and feather adaptations that enabled the transition from terrestrial dinosaurs to volant birds. This discovery not only enriches the evolutionary story of Archaeopteryx but also provides critical baseline data for interpreting the early diversification of avian bauplans.

As the scientific community digests these revelations, this specimen will undoubtedly remain a cornerstone for future research aimed at disentangling the complex evolutionary pathways that produced today’s vast and diverse avian clade. It stands as a vivid reminder of the intricate and gradual nature of evolutionary change, captured in the fossil record by one of the most iconic taxa in the history of science.

Subject of Research: Early evolution of the avian bauplan based on a new nearly complete Archaeopteryx specimen.

Article Title: Chicago Archaeopteryx informs on the early evolution of the avian bauplan.

Article References:
O’Connor, J., Clark, A., Kuo, PC. et al. Chicago Archaeopteryx informs on the early evolution of the avian bauplan. Nature (2025). https://doi.org/10.1038/s41586-025-08912-4

Image Credits: AI Generated

At the heart of this discovery lies the Prince Creek Formation, a fossil-rich geological deposit along Alaska’s Colville River on the North Slope. Although famously associated with dinosaur remains, this site has yielded a wealth of smaller vertebrate fossils such as fish bones and teeth, which until recently had been difficult to analyze due to their minuscule size. A team of paleontologists meticulously collected and examined sediment samples from this formation, employing advanced micro-computed tomography (micro-CT) to digitally reconstruct detailed 3D models of these fossilized jaws and other skeletal fragments. These virtual dissections have unveiled an extraordinary glimpse into freshwater ecosystems coexisting with polar dinosaurs.

Among the most significant findings is a newly identified species of salmonid fish named Sivulliusalmo alaskensis. The genus name draws from the Inupiaq language meaning “to be first” and Latin for “salmon,” underscoring the species’ pivotal place in evolutionary history. This species now holds the distinction of being the oldest known salmonid in the fossil record, extending the documented existence of this family by approximately 20 million years. Prior to this, the earliest salmon fossils had been found in southern regions like British Columbia and Washington.

The presence of Sivulliusalmo alaskensis, alongside two newly identified species of pike and the earliest representatives of the carp and minnow group, illustrates that many modern freshwater fish lineages were already adapting to high-latitude environments during the Late Cretaceous. This challenges the traditional perception that such fish families arose and primarily diversified in southern or temperate climates. Instead, it appears that northern polar regions were crucial evolutionary “crucibles,” where these taxa first developed and flourished.

Cretaceous Alaska was positioned much closer to the North Pole than it is currently and experienced markedly different climatic conditions, including elevated average temperatures compared to today’s Arctic. Despite this overall warmth, the region still exhibited extreme seasonal variations in daylight and temperature, factors that would have challenged aquatic life. The discovery that salmonids—a group known for their cold-water affinity—even thrived under these fluctuating polar conditions offers new insights into their ecological resilience and the adaptations that have allowed their descendants to dominate northern freshwater habitats for millions of years.

The detailed fossil examination stems from the painstaking work of collecting and processing sediment samples that often contained bones so minute they could fit atop a pencil eraser. Using microscopy complemented by micro-CT scanning, researchers from institutions including the University of Alaska Fairbanks, Western University in Ontario, and the University of Colorado Boulder digitally reconstructed these diminutive fossils. This non-destructive imaging technique allowed the team to explore internal structures and fine anatomical details that would be impossible to discern in traditional fossil preparations, dramatically enhancing the taxonomic resolution of the finds.

Furthermore, these freshwater fish fossils reveal an ecological tapestry that is intimately connected to the contemporaneous dinosaur fauna inhabiting Cretaceous Alaska. They extend the ecological narrative beyond the charismatic giant reptiles and include foundational elements of the aquatic food web, shedding light on how ancient polar ecosystems functioned. The coexistence of these fish with ancient mammals, birds, and dinosaurs underscores the complexity and diversity of high-latitude biomes during the Mesozoic Era.

Notably, the discovery suggests that the evolutionary trajectory of important fish groups, such as salmonids, was influenced significantly by polar environments. The absence of these fish types in fossil assemblages from contemporaneous lower latitude regions lends weight to the hypothesis that northern freshwater ecosystems were a central geographic origin for these lineages. This has profound implications for biogeographical models tracing the historical dispersal and diversification pathways of aquatic fauna.

The research team, led by Donald Brinkman of the Royal Tyrrell Museum of Palaeontology and senior authors including Patrick Druckenmiller of the University of Alaska Museum of the North, emphasize that their approach involved comprehensive sampling strategies targeting even the smallest fossil remains. This holistic methodology ensures that the full spectrum of vertebrate biodiversity from the Prince Creek Formation contributes to the paleoecological reconstruction, moving beyond the traditional focus on large, conspicuous fossils.

The implications of this study reach beyond paleontology, offering valuable perspectives for evolutionary biology, climatology, and conservation science. Understanding how ancient fish species endured and adapted through diverse and shifting climatic regimes provides potential analogues for predicting how modern freshwater ecosystems might respond to current and future environmental changes, particularly in Arctic and sub-Arctic regions.

In summation, the revelation of Sivulliusalmo alaskensis and its kin enriches our comprehension of ancient polar freshwater ecosystems and the evolutionary history of a globally important fish lineage. These findings underscore the delicate interplay between environmental factors and biodiversity that has shaped life on Earth across geological epochs. As scientific methods continue to advance, further discoveries in Alaska’s fossil record promise to deepen our knowledge, bridging the past and present of Arctic life.

Subject of Research: Animals

Article Title: Fishes from the Upper Cretaceous Prince Creek Formation, North Slope of Alaska, and their palaeobiogeographical significance

News Publication Date: 7-May-2025

Web References:
https://onlinelibrary.wiley.com/doi/full/10.1002/spp2.70014

References:
Brinkman, D. et al. (2025). Fishes from the Upper Cretaceous Prince Creek Formation, North Slope of Alaska, and their palaeobiogeographical significance. Papers in Palaeontology. DOI: 10.1002/spp2.70014

Image Credits:
Credit: UAF photo by Kevin May

Keywords:
Cretaceous fish fossils, Arctic paleontology, salmonid evolution, Prince Creek Formation, micro-computed tomography, high-latitude freshwater ecosystems, paleobiogeography, ancient salmon, fossil jaw reconstruction, North Slope Alaska, Late Cretaceous aquatic fauna