The review outlines how vascular-immune crosstalk affects various diseases, revealing novel therapeutic opportunities. It highlights the shared embryonic origin of blood vessel cells and immune cells, as well as coordinated immune cell trafficking mechanisms.
SourceImmunity & Inflammation·TypeSystematic review·DateFeb 16, 2026
The study found that living with HIV leads to a decline in labor market outcomes, including a 4% decrease in employment rates, a 5% reduction in work hours, and an 9% drop in annual earnings. The impact is most pronounced for individuals diagnosed with late-stage HIV.
SourceUniversiteit van Amsterdam·JournalNature Communications·TypeData/statistical analysis·DateFeb 16, 2026
Anker Laptop Power Bank 25,000mAh (Triple 100W USB-C)
Anker Laptop Power Bank 25,000mAh (Triple 100W USB-C) keeps Macs, tablets, and meters powered during extended observing runs and remote surveys.
Generative AI can play seven distinct roles in combating misinformation, including informer, guardian, persuader, and collaborator. However, its use also poses risks such as hallucinations and deliberate manipulation. To effectively combat misinformation, clear policies on the permissible use of AI are needed.
SourceUppsala University·JournalBehavioral Science & Policy·TypeSystematic review·DateFeb 16, 2026
Researchers have explored how human mesenchymal stem cells can help repair brain injury in children born preterm. The PREMSTEM project has investigated the use of h-MSCs to address brain injury caused by early-life birth, with promising results showing a positive impact on brain damage and inflammation.
SourceRMIT University·JournalJournal of Neuroinflammation·TypeExperimental study·DateFeb 16, 2026
New research suggests that inhaled microplastics can cause inflammation and damage to the lungs, potentially increasing the risk of respiratory diseases such as asthma and COPD. Microplastics can also trigger inflammatory responses and deliver toxins directly into the lungs, highlighting a growing concern for lung health.
SourceUniversity of Technology Sydney·JournalFood Bioscience·TypeSystematic review·DateFeb 16, 2026
Researchers at Tohoku University have developed a new technology that uses thioguanosine to achieve highly efficient and controllable interstrand crosslinking of DNA. This breakthrough enables reversible DNA modification with high stability and reversibility, opening opportunities for next-generation bionanomaterials.
SourceTohoku University·JournalCommunications Chemistry·DateFeb 16, 2026
A research team led by Universitat Autonoma de Barcelona has discovered the molecular mechanism regulating bacterial cell division. The MraZ protein binds to the dcw gene cluster, enabling coordinated action of proteins necessary for cell division and bacterial wall formation.
SourceUniversitat Autonoma de Barcelona·JournalNature Communications·TypeExperimental study·DateFeb 16, 2026
Sony Alpha a7 IV (Body Only)
Sony Alpha a7 IV (Body Only) delivers reliable low-light performance and rugged build for astrophotography, lab documentation, and field expeditions.
Researchers identified 255 insect species in perennial grasses, but few in annual grasses, highlighting the importance of unmown refuges for biodiversity
SourceUniversity of Göttingen·JournalBasic and Applied Ecology·TypeObservational study·DateFeb 16, 2026
Epicurrents is an open-source web browser application that enables users to view various clinical neurophysiology recordings directly in a web browser. It supports easy, secure, and cost-effective remote teaching and can be used for both educational purposes and scientific research.
SourceUniversity of Eastern Finland·JournalClinical Neurophysiology Practice·DateFeb 16, 2026
Researchers at the University of Bergen have discovered that thermal convection, a slow churning movement inside the ice driven by vertical differences in temperature, is responsible for the giant plumes. This finding could help reduce uncertainties in models of future ice sheet mass balance and sea-level rise.
SourceThe University of Bergen·JournalThe Cryosphere·DateFeb 16, 2026
The Olympic Games' substantial carbon footprint highlights the need for a profound overhaul to comply with the Paris Agreement. Researchers recommend scaling down events, reducing air travel and increasing use of renewable energy to achieve ambitious emission reduction targets.
SourceUniversity of Lausanne·JournalGeographical Journal·DateFeb 16, 2026
SAMSUNG T9 Portable SSD 2TB
SAMSUNG T9 Portable SSD 2TB transfers large imagery and model outputs quickly between field laptops, lab workstations, and secure archives.
A new study externally validates the NOFI model, which uses three clinical variables to predict feeding intolerance and stratify patients by 28-day mortality risk. The analysis found that patients in the high-risk group experienced substantially higher 28-day mortality compared with those in lower-risk groups.
SourceJournal of Intensive Medicine·JournalJournal of Intensive Medicine·TypeObservational study·DateFeb 16, 2026
A recent clinical trial led by Oregon State University scientists found that the composition of a dog's microbiome is linked to its cancer survival rate. The study identified 11 specific types of bacteria that were associated with longer or shorter survival, suggesting potential biomarkers for predicting treatment response and improvin...
SourceOregon State University·JournalVeterinary Oncology·TypeRandomized controlled/clinical trial·DateFeb 16, 2026
Global study finds that nitrogen pollution causes forests to follow two distinct patterns in response to added nutrients, with some experiencing a boost and others collapsing. The findings highlight the importance of reducing nitrogen levels to stabilize forest soil carbon pools and maintain natural respiration rhythms.
SourceAarhus University·JournalNature Communications·DateFeb 16, 2026
Research reveals that nuclear speckles are essential for processing and exporting viral messenger RNAs from the nucleus, highlighting their critical role in viral infections. The study suggests that understanding how viruses interact with host cells can lead to new ways to treat and prevent viral diseases.
SourceUniversity of Jyväskylä - Jyväskylän yliopisto·JournalProceedings of the National Academy of Sciences·TypeExperimental study·DateFeb 16, 2026
SourceUniversity of Seville·JournalGeographies·DateFeb 16, 2026
Davis Instruments Vantage Pro2 Weather Station
Davis Instruments Vantage Pro2 Weather Station offers research-grade local weather data for networked stations, campuses, and community observatories.
SourceUniversity of Bath·JournalCommunications Psychology·DateFeb 16, 2026
SourcePotsdam Institute for Climate Impact Research (PIK)·JournalNature Climate Change·TypeComputational simulation/modeling·DateFeb 16, 2026
SourceNational Institutes of Natural Sciences·JournalJournal of the American Chemical Society·TypeExperimental study·DateFeb 16, 2026
SourceImperial College London·JournalJAMA Oncology·DateFeb 16, 2026
Apple iPhone 17 Pro
Apple iPhone 17 Pro delivers top performance and advanced cameras for field documentation, data collection, and secure research communications.
SourceUniversity of Arizona·JournalThe Astrophysical Journal Letters·TypeObservational study·DateFeb 16, 2026
SourceUniversity of Technology Sydney·JournalHeart Lung and Circulation·TypeSurvey·DateFeb 16, 2026
SourceUniversity of Malaga·JournalJournal of Neuroinflammation·TypeExperimental study·DateFeb 16, 2026
SourceEdith Cowan University·JournalNew Phytologist·TypeExperimental study·DateFeb 16, 2026
SourceLudwig-Maximilians-Universität München·JournalNature Biomedical Engineering·DateFeb 16, 2026
DJI Air 3 (RC-N2)
DJI Air 3 (RC-N2) captures 4K mapping passes and environmental surveys with dual cameras, long flight time, and omnidirectional obstacle sensing.
SourceInstitute of Science Tokyo·JournalACS Applied Bio Materials·TypeExperimental study·DateFeb 16, 2026
SourceSalk Institute·JournalNature Genetics·DateFeb 16, 2026
SourceAdelaide University·JournalNature·TypeSystematic review·DateFeb 16, 2026
Meta Quest 3 512GB
Meta Quest 3 512GB enables immersive mission planning, terrain rehearsal, and interactive STEM demos with high-resolution mixed-reality experiences.
The University of Texas at Arlington receives a six-year $2 million NSF grant for math scholarships up to $15,000. The program aims to address the national STEM workforce need and nurture talent.
A new paper argues that FDA-required drug labels should not be used as key evidence in patent cases against generic-drug manufacturers. Instead, clinicians rely on guidelines, experience, and medical literature when making prescribing decisions.
SourceUniversity of Illinois at Urbana-Champaign, News Bureau·JournalNew England Journal of Medicine·TypeCommentary/editorial·DateFeb 16, 2026
A new Yale study found that children with disruptive behavior may have trouble transitioning between different brain states, leading to difficulties in executive functioning and emotion regulation. The research uses advanced computational methods to track moment-to-moment changes in brain connectivity.
Researchers have developed a new method for cleaning oil spills using massive fire whirls, which can burn through crude oil nearly twice as fast as in-situ fire pools. The results show that fire whirls produce 40% less soot and consume up to 95% of the fuel, leaving fewer harmful particles behind.
Kestrel 3000 Pocket Weather Meter
Kestrel 3000 Pocket Weather Meter measures wind, temperature, and humidity in real time for site assessments, aviation checks, and safety briefings.
A new study reveals that offshore wind farms can create complex wake structures that interact with each other, affecting surface currents and sediment transport. The research suggests that turbines spaced farther apart can reduce turbulence caused by tidal wakes, leading to optimized wind farm designs.
SourceHelmholtz-Zentrum Hereon·JournalNature·TypeComputational simulation/modeling·DateFeb 16, 2026
Researchers at University of Illinois have created a model that captures the metal material's response to stress and predict failure hotspots using pixel-scale images. The algorithm uses machine learning to output strain fields from computational simulations, predicting mechanical response based on crystal orientations.
SourceUniversity of Illinois Grainger College of Engineering·JournalInternational Journal of Solids and Structures·DateFeb 16, 2026
Larry Steckel, a leading expert in weed science, has been elected Fellow by the Weed Science Society of America. His research program focuses on managing multiple-herbicide-resistant weeds in row crop production, providing critical data for farmers to prevent yield loss.
SourceUniversity of Tennessee Institute of Agriculture·DateFeb 16, 2026
Scientists at HZI have developed a new technique to visualize the complex process of bacterial capsule production. They used cryo-electron microscopy to study the Wza-Wzc transport channel, which is responsible for knitting the sugar cloak that protects bacteria from the environment and immune cells.
SourceHelmholtz Centre for Infection Research·JournalNature Communications·TypeExperimental study·DateFeb 16, 2026
Celestron NexStar 8SE Computerized Telescope
Celestron NexStar 8SE Computerized Telescope combines portable Schmidt-Cassegrain optics with GoTo pointing for outreach nights and field campaigns.
Physicists at LMU have successfully tracked the extremely brief formation process of polarons using an ultrafast imaging method, confirming a theory from 1933. The researchers demonstrated that electrons lose energy and gain mass as they form these quasiparticles.
SourceLudwig-Maximilians-Universität München·JournalPhysical Review Materials·DateFeb 16, 2026
A collaborative effort by researchers from the University of Göttingen and other institutions is creating a genomic inventory of European marine annelids. The goal is to accelerate biodiversity research worldwide and counteract the 'silent extinction' of marine species.
A study revealed a path of molecular events that can lead to Alzheimer's disease, including the formation of amyloid plaques and tau tangles. Researchers identified genes involved in immune and synaptic regulatory mechanisms as potential therapeutic targets.
SourceBaylor College of Medicine·JournalMolecular Psychiatry·TypeExperimental study·DateFeb 16, 2026
A medication commonly used to treat overactive bladder significantly reduced hot flashes in men receiving hormone therapy for prostate cancer. Men who took oxybutynin also reported improvements in day-to-day functioning and overall quality of life.
SourceMayo Clinic·JournalJournal of Clinical Oncology·DateFeb 16, 2026
Climate change alters high-elevation meadows, causing plant communities to shift towards shrub-dominated landscapes. The changes also affect the soil ecosystem, with declines in mycorrhizal fungi and increases in decomposers.
SourceUniversity of Oklahoma·JournalProceedings of the National Academy of Sciences·DateFeb 16, 2026
GQ GMC-500Plus Geiger Counter
GQ GMC-500Plus Geiger Counter logs beta, gamma, and X-ray levels for environmental monitoring, training labs, and safety demonstrations.
A new commentary raises concerns about editorial bias in scientific publishing, particularly in relation to COVID-19 vaccine safety and efficacy. The authors highlight the rejection of a case report and literature review that raised potential links between mRNA vaccines and rare blood cancers.
SourceImpact Journals LLC·JournalOncotarget·TypeCommentary/editorial·DateFeb 16, 2026
A special issue of Circulation highlights progress in women's cardiovascular health, featuring sex-specific research on prevention, diagnosis and management. The American Heart Association's Go Red for Women initiative supports over 200,000 healthcare professionals with educational tools to improve women's health.
SourceAmerican Heart Association·JournalCirculation·DateFeb 16, 2026
A study found that pairing student journalists with communities through structured conversation can help rebuild trust and teach future reporters how to listen to and investigate the needs of overlooked communities. The program resulted in 27 conversations involving students and 135 community members, generating a complete curriculum f...
SourceUniversity of Kansas·JournalJournalism Practice·TypeObservational study·DateFeb 16, 2026
The study reveals that no two sprinters look the same at full speed due to unique interactions between body, environment, and training history. By embracing movement variability and individuality, coaches can create learning environments that allow athletes to discover efficient techniques.
SourceFlinders University·TypeMeta-analysis·DateFeb 16, 2026
Apple MacBook Pro 14-inch (M4 Pro)
Apple MacBook Pro 14-inch (M4 Pro) powers local ML workloads, large datasets, and multi-display analysis for field and lab teams.
Researchers at TU Wien have successfully created and read a QR code smaller than most bacteria, setting a new world record. The technology has enormous potential for long-term data storage, with the ability to store over 2 terabytes of data on a single A4 sheet.
Researchers at Mizzou's Bond Life Sciences Center have discovered how a specific protein known as SRFR1 regulates root growth in plants. They unlocked a way to manipulate this protein to encourage longer root growth, which can potentially help plants better withstand drought.
SourceUniversity of Missouri-Columbia·JournalThe Plant Cell·TypeExperimental study·DateFeb 16, 2026
Pathogenic bacteria in gut and breast tissue can promote breast cancer development by increasing SMOX activity, leading to DNA damage and tumor growth. Targeting SMOX with inhibitors could be a viable strategy to counteract the cancer-promoting effects of microbial dysbiosis.
SourceJohns Hopkins Medicine·JournalCancer Research·DateFeb 16, 2026
A nationwide cohort study found that chronic kidney disease significantly heightens mortality risk, even at moderate levels, and exceeds traditional metabolic risk factors. Maintaining renal function and early detection of CKD are critical for reducing both all-cause and cardiovascular mortality.
SourceChinese Medical Journals Publishing House Co., Ltd.·JournalChinese Medical Journal·DateFeb 16, 2026
Apple AirPods Pro (2nd Generation, USB-C)
Apple AirPods Pro (2nd Generation, USB-C) provide clear calls and strong noise reduction for interviews, conferences, and noisy field environments.
Researchers from The University of Osaka developed a novel device to harness wave power, achieving high energy absorption efficiency across broadband frequencies. By tuning gyroscopic parameters, the device can maximize performance, providing a roadmap for developing adaptable and efficient wave energy converters.
SourceThe University of Osaka·JournalJournal of Fluid Mechanics·DateFeb 16, 2026
A new study from King's College London and the University of Exeter found that ketamine's therapeutic benefits for people with alcohol use disorder may not be linked to its psychoactive effects. Instead, other factors such as brain network alterations and neural connections may play a role in the treatment's success.
SourceUniversity of Exeter·JournalAddiction·DateFeb 16, 2026
A cross-sectional analysis found that nearly half of mental health visits and 29 million non-mental health telehealth visits occurred annually. The study suggests that telehealth has become an essential component of care for older and medically vulnerable adults, raising concerns about rolling back telehealth flexibilities.
SourceAmerican College of Physicians·JournalAnnals of Internal Medicine·TypeNews article·DateFeb 16, 2026
New research from the University of Oregon finds that risk maps for radon can increase testing intentions in medium- to high-risk areas, but have no effect on people living in low-risk zones. The study suggests that maps may be used to target specific areas depending on their risk level.
SourceUniversity of Oregon·JournalPublic Health·DateFeb 16, 2026
Research finds a specific link between hearing loss and cognitive decline in presbycusis, a neurodegenerative disorder. The Functional-Structural Ratio (FSR) identifies reduced connections between brain areas involved in sound processing and memory, associated with worse hearing thresholds and poorer performance on memory and executive...
SourceSociety for Neuroscience·JournaleNeuro·DateFeb 16, 2026
Rigol DP832 Triple-Output Bench Power Supply
Rigol DP832 Triple-Output Bench Power Supply powers sensors, microcontrollers, and test circuits with programmable rails and stable outputs.
Researchers developed an AI-based tool called BIOPREVENT to identify patients at higher risk for chronic GVHD and dying from transplant-related causes. The tool combines immune biomarkers, clinical data, and machine learning to create a personalized risk estimate over time.
SourceMedical University of South Carolina·JournalJournal of Clinical Investigation·TypeData/statistical analysis·DateFeb 16, 2026
A population-based study reveals that rotator cuff abnormalities are common after age 40 and often represent normal age-related changes. The findings challenge the clinical value of routine imaging for atraumatic shoulder pain, questioning the need for regular scans in this demographic.
SourceJAMA Network·JournalJAMA Internal Medicine·DateFeb 16, 2026
A new study shows that pancreatic cancer cells' ability to detect the extracellular matrix determines their growth rate and response to chemotherapy. The researchers found that cells detecting ECM have low autophagy levels and high growth rates, while those farther away from ECM have high autophagy levels and can survive chemotherapy.
SourceNYU Langone Health / NYU Grossman School of Medicine·JournalCell·TypeExperimental study·DateFeb 16, 2026
Nearly 2/3 of US adults reported using medication in the past 7 days, with similar prevalence of over-the-counter and prescription medications. This study emphasizes the reliance on these therapies and underscores the need for increased accessibility to address health disparities.
SourceJAMA Network·JournalJAMA Network Open·DateFeb 16, 2026
A new study by Harvard Pilgrim Health Care Institute reveals that one in five US households reported a child needing mental health treatment, yet nearly a quarter didn't receive it. The study also found disparities among families with single parents, multi-child households, homeschooling families, and uninsured households.
SourceHarvard Pilgrim Health Care Institute·JournalJAMA Pediatrics·DateFeb 16, 2026
CalDigit TS4 Thunderbolt 4 Dock
CalDigit TS4 Thunderbolt 4 Dock simplifies serious desks with 18 ports for high-speed storage, monitors, and instruments across Mac and PC setups.
A nationally representative study found that 1 in 5 US households have a parent-perceived mental health treatment need for their children. The study also revealed significant difficulties in accessing care, with 21.8% citing it as the reason for unmet needs.
Researchers at PolyU have discovered that combining music and empathetic speech in robots can foster a stronger bond between humans and machines. Music enhances the emotional resonance of on-screen robots, making interactions feel more real, but its impact diminishes over time.
SourceThe Hong Kong Polytechnic University·JournalACM Transactions on Human-Robot Interaction·DateFeb 16, 2026
The study investigated the bioactive polyphenolic compounds and their anti-degenerative properties in foliar tissues of Amaranthus hypochondriacus L. The results showed germplasm-specific variations in pharmacological potential, with some accessions exhibiting promising anti-degenerative properties.
SourceXia & He Publishing Inc.·JournalJournal of Exploratory Research in Pharmacology·DateFeb 16, 2026
This review examines cancer-inflammation interplay, translational advances, and clinical strategies. Emerging technologies promise to refine precision therapy, while integrating inflammation-targeting approaches with immunotherapy offers a path to personalized cancer care.
SourceXia & He Publishing Inc.·JournalJournal of Exploratory Research in Pharmacology·DateFeb 16, 2026
Creality K1 Max 3D Printer
Creality K1 Max 3D Printer rapidly prototypes brackets, adapters, and fixtures for instruments and classroom demonstrations at large build volume.
A Washington State University study found that NBA teams with pay disparities among core players had lower winning percentages due to reduced coordinated effort. The researchers suggest managers ensure top performers are paid fairly in relation to each other and emphasize teamwork.
SourceWashington State University·JournalHuman Performance·TypeData/statistical analysis·DateFeb 16, 2026
Researchers in Brazil developed a plant-based solution to shield hair from heat and environmental damage. The biopolymer film created by tara and red algae improves shine and combability while making hair slightly less elastic.
SourceAmerican Chemical Society·JournalACS Omega·DateFeb 16, 2026
A new study finds that Antarctica's gravity hole formed as a result of slow rock movements deep under the Earth's surface, which overlapped with major changes in the continent's climate system. The study suggests that future research could reveal how the shifting gravity may have encouraged the growth of ice sheets.
SourceUniversity of Florida·JournalScientific Reports·TypeComputational simulation/modeling·DateFeb 16, 2026
This study developed and evaluated an automatic method for lung nodule detection and classification using a CNN-based architecture on the LIDC-IDRI database. The proposed method achieved high sensitivity and accuracy, with competitive performance compared to recent studies.
SourceXia & He Publishing Inc.·JournalExploratory Research and Hypothesis in Medicine·DateFeb 16, 2026
A new framework introduces the Water Sustainability Index (WSI), a transparent, quantitative metric designed to strengthen corporate water accountability worldwide. The WSI evaluates corporate water withdrawals, consumption, discharge quality, and reuse while accounting for local water scarcity.
SourceCactus Communications·JournalNature Water·TypeComputational simulation/modeling·DateFeb 16, 2026
Apple Watch Series 11 (GPS, 46mm)
Apple Watch Series 11 (GPS, 46mm) tracks health metrics and safety alerts during long observing sessions, fieldwork, and remote expeditions.
Researchers developed a new method to discover molecular glues through large-scale chemistry and cell-based screening. They identified compounds that selectively degrade ENL in leukemia cells, demonstrating the potential of this approach for targeting previously undruggable proteins.
SourceCeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences·JournalNature Chemical Biology·TypeExperimental study·DateFeb 16, 2026
Researchers developed AI-IR, a machine learning tool that predicts insulin resistance and implies a link to cancers. The model demonstrated strong predictive power in detecting insulin resistance that BMI alone cannot explain.
SourceUniversity of Tokyo·JournalNature Communications·TypeMeta-analysis·DateFeb 16, 2026
Researchers at ISTA discover perovskites' unique photovoltaic properties rely on structural defects, enabling long-range charge transport. This finding accelerates the transition of next-gen perovskite solar cells to real-world applications.
SourceInstitute of Science and Technology Austria·JournalNature Communications·TypeExperimental study·DateFeb 16, 2026
Researchers at EPFL have developed a method to overcome challenges in osmotic energy systems, enabling ions to flow through a nanofluidic membrane with unprecedented speed and control. By lubricating nanopores with lipid molecules, they achieved significantly boosted ion transport and overall performance.
SourceEcole Polytechnique Fédérale de Lausanne·JournalNature Energy·DateFeb 16, 2026
GoPro HERO13 Black
GoPro HERO13 Black records stabilized 5.3K video for instrument deployments, field notes, and outreach, even in harsh weather and underwater conditions.
A new study uses advanced MRI to accurately diagnose progressive supranuclear palsy (PSP) and corticobasal degeneration (CBD), two underdiagnosed conditions. This breakthrough enables precise clinical trials and transforms treatment options for patients with balance problems, falls, stiffness, or difficulties with speech and movement.
SourceInstitut de Recerca Sant Pau (Sant Pau Research Institute)·JournalThe Journal of Prevention of Alzheimer s Disease·TypeObservational study·DateFeb 16, 2026
A national poll found that nearly half of parents are aware of the risk of sudden cardiac arrest in teens, but only about half know their school has an automated external defibrillator (AED) on site. Parents support CPR and AED training, with four in 10 already trained to use an AED, and nearly nine in 10 willing to receive free training.
SourceMichigan Medicine - University of Michigan·DateFeb 16, 2026
A national US study of tens of thousands of college students found that excessive social media use is linked to higher odds of loneliness. Students who spent 16 hours or more on social media per week were 38% more likely to feel isolated.
SourceTaylor & Francis Group·JournalJournal of American College Health·TypeObservational study·DateFeb 16, 2026
A survey by Ohio State University Wexner Medical Center reveals that 76% of people don't complete their physical therapy homework. Adding home exercises to routines can help successful recovery and reduce the need for additional medical procedures.
SourceOhio State University Wexner Medical Center·TypeSurvey·DateFeb 16, 2026
A new strategy primes the immune system before infection occurs, demonstrating a striking protective effect against antibiotic-resistant bacteria and influenza. DDM activates neutrophils, enhancing their phagocytic and bactericidal activities to eliminate invading pathogens.
SourceNational Research Council of Science & Technology·JournalEBioMedicine·DateFeb 16, 2026
Apple iPad Pro 11-inch (M4)
Apple iPad Pro 11-inch (M4) runs demanding GIS, imaging, and annotation workflows on the go for surveys, briefings, and lab notebooks.