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.
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.
Harvard researchers formally describe the 100-year-old arthropod fossil Helmetia expansa, offering new insights into its anatomy, behavior, and evolutionary relationships. The study reveals that Helmetia likely walked like trilobites and exhibited a unique molting strategy.
Researchers discover 555-million-year-old worm-like organism, Uncus dzaugisi, in Precambrian rocks of Nilpena Ediacara National Park. This tiny fossil represents the oldest confirmed member of Ecdysozoa and offers direct evidence of early ecdysozan life forms from the Precambrian.
A new study published in Science Advances provides insights into the complex and nonlinear transition of mammal evolution from sprawled to upright posture. Researchers used cutting-edge methods to analyze fossil data and biomechanical modeling, revealing that locomotor performance peaked and dipped over millions of years.
A new study has revealed that 90 species of plants from the Centinela range were not extinct as previously thought. The researchers found abundant evidence of the flora's presence in remaining forest fragments and discovered over 50 new plant species, including eight newly described species.
Researchers found that cetaceans' backbones are highly regionalized, with a shift in vertebral column driving locomotion in aquatic environments. The team developed a computational software, MorphoRegions, to analyze the backbone of each specimen individually.
Researchers at Harvard University used confocal laser microscopy to examine ancient fossils of tardigrades, revealing a new species and confirming the existence of four previously unknown specimens. The study sheds light on the evolutionary history of tardigrades, including their ability to survive extreme conditions.
Researchers discovered that a 30-million-year-old feline ancestor had both brown and gray-eyed individuals, paving the way for modern felid iris color diversity. The study found a correlation between yellow eyes and round pupils, as well as an ancestral population with brown eyes only before gaining gray-eyed individuals.
An interdisciplinary team of researchers developed an AI system capable of deciphering genomic language and understanding its functional and regulatory grammar. The Genomic Language Model (gLM) learns from highly diverse metagenomic data, providing insights into gene functions, regulation, and evolutionary relationships.
A study by Harvard researchers found that fish group behavior can reduce energy costs by up to 50%, with coordinated movement allowing for more efficient swimming. By measuring the energetic cost of individual and group movements, the team discovered a J-shaped relationship between speed and energy expenditure.
A new study has shed light on the convergent evolution of defensive enrollment in arthropods by analyzing 3D-preserved trilobite soft tissues. The fossils, which date back to the Ordovician Period, show that trilobites used a unique mechanism to protect their vulnerable soft tissues with their hard exoskeletons.
Researchers discovered that true crabs have left the marine environment up to 17 times over the past 100 million years, with most species able to survive in semi-terrestrial habitats. The study's findings provide insights into convergent evolution and the adaptation of crabs to life on land.
A 312-million-year-old fossil found in the Carboniferous Rhode Island Formation provides evidence of how internal feeding, known as leaf mining, may have originated. The discovery sheds light on the evolution and behavior of holometabolous insects, including modern-day moths, beetles, flies, and wasps.
A 265-million-year-old fossil discovery in Brazil yields the oldest and largest known predator in South America, predating the rise of dinosaurs. The exquisitely preserved Pampaphoneus biccai had a skull over 40cm long and sharp canine teeth adapted for capturing prey.
A 500-million-year-old tunicate fossil named Megasiphon thylakos has provided unprecedented insights into the early evolutionary history of this enigmatic group. The fossil's unique morphology and soft tissue preservation suggest that ancestral tunicates were stationary, filter-feeding adults with a non-moving lifestyle.
A recent study by Carolyn Elya reveals the molecular mechanisms behind summiting behavior in infected fruit flies. The researchers discovered that hormonal axes mediate this behavior, and that fungal cells invade the fly's brains during summiting.
Researchers discovered that viruses that infect bacteria and archaea in deep-sea hydrothermal vents share a common immunological memory, allowing symbiotic microbes to defend against the same virus. This challenges conventional wisdom on virus-host interactions, revealing a more nuanced relationship between these microorganisms.
A recent study using planktonic foraminifera fossils found a global clade-wide shift in marine latitudinal zones towards the Equator. The researchers discovered that this shift was not tied to species diversity or functional traits, but rather ecological and morphological characteristics of the organisms.
Deep-sea squat lobsters are reclassified after Harvard researchers discovered five new species, showing wider geographic distribution ranges and shallower genetic diversity. The discovery highlights the importance of molecular data in understanding evolutionary history.
Researchers discovered the cellular mechanism and molecular trajectory for formation of adult pluripotent stem cells in the acoel worm Hofstenia miamia. This study provides insight into regenerative abilities of certain animals and may lead to new understanding of how stem cells are made.
Researchers found evidence of fibrolamellar bone in early tetrapod Whatcheeria, suggesting rapid juvenile growth. This contradicts the long-held assumption that slow growth was ancestral for tetrapods, and instead reveals a more complex life history.
Root exudates, organic compounds released from plant roots, regulate soil carbon formation and loss. Contrary to expected results, high rates of root exudation lead to increased loss of soil carbon.
Two new specimens, Mieridduryn bonniae, have been discovered in a Welsh fossil deposit, providing insights into the evolution of arthropods. The fossils feature striking similarities to Opabinia, suggesting that they may be related to modern arthropod larvae.
Harvard researchers found that rapid evolution of reptiles began much earlier than previously thought, connected to increasing temperatures. The study used a dataset of over 1,000 fossil specimens and analyzed their adaptation to climatic shifts.
A new study reveals that four living amphibian clades, including the dominant Plethodontidae family of lungless salamanders, develop lungs as embryos but lose them as adults. This finding sheds light on the evolution of lung loss over millions of years and suggests that losing lungs may have enabled their remarkable evolutionary success.
A Harvard researcher has been awarded a $1.1 million grant to study the evolution of aerial breathing in arthropods, exploring how they transitioned from water to land over 100 million years ago. The team aims to understand the role of atmospheric oxygen in facilitating this process and its impact on respiratory structures.
Researchers discovered fossilized trilobite appendages exhibiting characteristics similar to those found in male horseshoe crabs. These findings suggest a unique mating strategy, where males use the appendages to grasp females during reproduction, providing insight into the reproductive behavior of ancient complex animals.
Researchers from Harvard University have confirmed a previously unknown species as the second opabiniid to be discovered, Utaurora comosa. The ancient arthropod shares characteristics with both radiodonts and Opabinia, highlighting the complexity of Cambrian evolution.
Researchers discovered that microbes capable of extracellular electron transfer (EET) are spread through horizontal gene transfer and exist in various environments worldwide. The genes, which enable EET, were found in a wide range of organisms, from deep-sea microbes to human gut bacteria.
The fossil of Callichimaera perplexa boasts remarkably large eyes that grow throughout development, unlike most crab species. Its exceptional vision suggests it was a highly visual, swimming predator.
A global dataset of over 200,000 plant species shows that human activity is the biggest driver of homogenization of plant communities. Non-native invasive plants naturalized by humans are the strongest contributor to biotic homogenization.
Researchers discovered that humidity-driven movement in spore-bearing leaves is the key mechanism behind the unique timing of spore dispersal in the sensitive fern. The study found that dead fronds open when dry and close when wet due to differential cell expansion, a process also observed in pine cones.
Researchers have successfully created transgenic three-banded panther worms to study regeneration, revealing detailed insights into the cellular anatomy of these animals. By manipulating specific genes, scientists can now investigate the role of muscle cells in holding the worm's body together and storing information for regeneration.
Researchers shed light on the evolution of mammalian tusks by tracing them back to ancient mammal relatives called dicynodonts. Dicynodonts had protruding tusks in their upper jaws, but they were not always true tusks – instead, some had enamel-coated teeth that did not fit the definition.
A team of scientists has discovered the oldest modern-looking crab, Cretapsara athanata, preserved in 100-million-year-old amber. The fossil is remarkably complete, including delicate tissues and well-developed gills, revealing an aquatic to semi-aquatic animal that defies explanation for its preservation in tree resin.
Researchers describe a new modern-looking tardigrade fossil, Paradoryphoribius chronocaribbeus, found in Miocene Dominican amber. The study reveals unique foregut organization and contributes to the scant tardigrade fossil record, providing insight into the ancient superfamily Isohypsibioidea.
The project aims to digitize three million plant specimens from US herbaria and combine with data from Asia and Europe, accelerating research on endangered species and plant biodiversity. The Harvard University Herbarium will lead the effort, connecting institutions in the US, Europe, and Asia.
Researchers sequenced the bowfin genome to investigate its unique combination of ancestral and advanced features. The study found unexpected insights into diverse aspects of bowfin biology, including the absence of key genes in its pectoral fin.
A new fossil species, Taytalura alcoberi, has been discovered in Argentina's Late Triassic deposits. The 3D-preserved fossil provides insights into the early evolution of lepidosaurs, with its skull revealing a unique sphenodontian body type and dentition that differ from living or extinct groups.
Researchers from Harvard University find that the earliest tetrapods acquired new adaptive traits at fast rates of anatomical evolution, but species diversification was slow initially. The study suggests a decoupling between evolutionary rates and species diversity, with a delay in colonization of land and diversification into new niches.
Researchers describe two new species of fossil ctenophores from Utah with preserved nervous systems and up to 24 comb rows. These findings suggest that Cambrian ctenophores had more complex nervous systems than living species, with specific nerve tracks along the body and a ring around the mouth.
Researchers discovered methane-eating microbes in seafloor carbonate rocks that consume methane 50 times faster than in sediment, highlighting their crucial role in regulating Earth's temperatures. The porous nature of these rocks facilitates the growth and exchange of microbes, allowing them to thrive and maintain high metabolic rates.
Researchers found that army ant mass raids originated from group raiding behavior in smaller colonies, with a massive increase in colony size correlating to the evolution of mass raids. The study uses custom computer vision software to track individual ants and analyze their behavior.
Researchers developed DANNCE, a 3D deep-neural network that can capture behavior and track movement in freely behaving animals from single video cameras. The tool has broad impact on animal behavioral studies, enabling standardized definitions of behaviors and tracing emergence of behavior over time.
Researchers at Harvard University found that the crab-like body plan evolved at least five times independently in both true crabs (Brachyura) and false crabs (Anomura). The team also discovered that the crab-like body plan has been lost at least seven times in a process called decarcinization. This study provides insights into the evol...
A team of researchers overturns the long-standing hypothesis that mammal ancestors moved like modern lizards. They discovered that non-mammalian synapsids moved their backbone in a manner distinctly different from any living animal.
The study found that eight montane hotspots harbor 58% of fern species, with heightened diversity at elevations over 1000m. Ferns' rapid diversification is linked to tropical mountain ecosystems with stable climates.
Researchers at Harvard University discovered that zebrafish fins can be transformed into complex limb-like structures through genetic mutations. The study reveals that the ability to form limb-like structures was present in the common ancestor of tetrapods and teleost fishes.
Researchers discovered three functional stages in the transition from fins to limbs, with early tetrapods exhibiting a unique pattern of muscle leverage. Their limbs were more adapted for propulsion than weight bearing, reflecting their aquatic origins and need to adapt to life on land.