Horses produce high-frequency sounds by whistling through their larynx while vibrating vocal folds. Researchers found that the high-frequency component of the whinny is generated by a laryngeal whistle, shifting to higher frequencies when helium is used.
Researchers argue that mandated reminders about a chatbot's non-human nature may exacerbate mental distress and form stronger attachments. The warnings come after recent deaths by suicide linked to chatbots like ChatGPT and Character.AI, highlighting the need for careful crafting and timing of these reminders.
Prolonged grief disorder (PGD) is characterized by intense emotional pain and longing for the deceased. Research highlights disruptions in reward-related brain networks as key to explaining why grief persists in some individuals.
Researchers found that exercise changes brain activity in nerve cells called SF1 neurons, which helps muscles and hearts become stronger. This brain region plays a key role in regulating energy use and body weight.
Lung cancer in never-smokers (LCINS) is a growing global health challenge with distinct biological and clinical characteristics. The authors emphasize the importance of identifying risk factors, developing better screening tests, and discovering more effective treatment approaches for LCINS.
Research found that oak tree microbiomes are resilient to environmental stressors like drought and disease, with subtle changes in root microbiota after prolonged drought. The study suggests a potential role for beneficial bacteria in supporting tree resilience and stability.
Researchers examined evidence and offered a simpler explanation for increased electrical activity in spruce trees, finding no evidence of anticipation or communication. The study suggests that plants can perceive environmental changes but only respond to significant challenges.
Biologist Douglas Hanahan proposes an updated framework to help understand the complexity of human cancer. The new framework, known as Hallmarks of Cancer, offers a four-dimensional approach to analyzing cancer development and progression.
Researchers have created an artificial lung system that temporarily replaced a patient's lungs' functions, allowing him to survive for 48 hours until a double lung transplant was available. The study shows that this approach may serve as a life-saving bridge to transplantation, providing new hope for those with severe respiratory condi...
A study reveals that expanding existing mines worsens environmental and social risks over time, with many operations concentrated in high-risk contexts. The practice tends to draw less regulation due to its routine nature, unlike new mining projects.
Researchers created lab-grown human nasal tissue to study the defense mechanisms against rhinoviruses. They found that cells in the nasal lining produce interferons, which induce a coordinated antiviral defense, controlling viral replication and reducing damage.
Researchers have discovered the first case of flexible, multi-purpose tool use in cattle, with Veronika using a deck brush to scratch different body regions. The study highlights the cognitive abilities of cattle and expands our understanding of animal intelligence.
Researchers developed a lightweight, self-powered eye-tracking system that runs off the energy generated through blinking. The system detects eye movements with high precision and can be used to enable people with mobility impairments such as ALS to control wheelchairs or communicate by moving only their eyes.
Researchers found that AIs consistently converged on 12 common themes despite diverse prompts, suggesting biases in training data. The models failed to generate novel or creative outputs, highlighting the need for anti-convergence mechanisms and human input for AI's creative potential.
Research shows that high glucose levels cause mitochondria to move towards the periphery of pancreatic beta cells. This movement is linked to insulin secretion and may play a role in regulating blood sugar levels. The study found that inhibiting microtubules disrupted this process, suggesting a key role for these structures in mitochon...
Researchers studying long COVID are drawing parallels with historical chronic illnesses, highlighting the need for effective interventions. By analyzing past epidemics and post-acute infection syndromes, scientists hope to gain insight into the mechanisms of these conditions.
Research suggests that owning a family dog during adolescence can boost mental well-being and social support by altering the gut microbiota. The study found that adolescents with dogs had higher mental health scores and lower social problems compared to those without dogs.
The article proposes a circular economy approach to reduce waste, increase durability, and repurpose spacecraft and satellites. Data analysis and digital technologies will be essential for developing sustainable practices.
Biomedical researchers recommend diversifying funding sources, pursuing earlier licensing and commercialization, and fostering international collaborations. The US drug discovery landscape is at risk due to federal funding cuts, and alternative approaches are needed to ensure continued progress.
Researchers sent moss spores to space and found that over 80% survived for 9 months, reproducing upon return. The structure surrounding the spore protected it from UV radiation, allowing it to thrive in extreme conditions.
Researchers used CRISPR to increase fungal production efficiency and cut environmental impact by 61% without adding foreign DNA. The genetically tweaked fungus tastes like meat and is easier to digest than its naturally occurring counterpart.
A parasitic ant queen tricks ant workers into killing their queen mother by spraying a foul-smelling chemical, causing her daughters to turn against her. The parasitic queen then usurps the throne and is served by the workers.
Researchers conclude that the hypothesis of a causal relationship between the gut microbiome and autism is unsupported by science. Key findings include inadequate sample sizes and flawed statistical methods in studies attempting to establish this link. The authors argue for a more rigorous approach to studying this topic.
Researchers demonstrate that bacteria can produce fabric and dye it in every color of the rainbow using a single vat. The approach uses bacterial cellulose as a potential alternative to petroleum-based fibers, reducing greenhouse gas emissions and environmental harm. The developed method yields vibrant colors that survive washing and h...
Plant biologists developed a method to grow transgenic plants in weeks instead of months by hijacking a plant's natural regeneration abilities. The technique uses bacteria carrying genetic instructions for wound healing and regeneration to trigger plant growth.
Researchers discover tiny antibody-like proteins from camels and llamas that can treat brain disorders like schizophrenia and Alzheimer’s disease with fewer side effects. The nanobodies are smaller than conventional antibodies, making them easier to produce and purify.
A team of biomechanical engineers and surgeons has developed a 3D-printing soft robot that can accurately deliver hydrogels to the vocal cord surgical site. The device, which is only 2.7 mm in size, can reconstruct tissues removed during surgery and potentially prevent fibrosis and stiffening of the vocal cords.
Researchers extracted DNA from Napoleon soldiers' teeth and identified Salmonella enterica and Borrelia recurrentis as causes of enteric fever and relapsing fever. The discovery sheds new light on the factors contributing to the army's downfall.
International experts have established guidelines for gene therapy in hereditary hearing loss, emphasizing patient-centered care and respect for diversity. The guidelines outline frameworks for clinical trials, including patient selection criteria, surgical procedures, and safety evaluations.
Researchers found that even extreme athletes cannot surpass an average metabolic ceiling of 2.5 times their basal metabolic rate in energy expenditure. The study tracked ultra-runners and cyclists, finding that while they can burn six to seven times their BMR during multi-day races, longer periods see a return to the predicted ceiling.
Researchers call for greater transparency and regulation in the vegetable oil industry to enable consumers to make informed decisions about their oil choices. The authors emphasize that almost all oils are associated with biodiversity and human rights issues in some contexts, depending on crop management and supply chains.
A meta-analysis of 100 studies across psychology, sociology, economics, and engineering found that positive attitudes toward conserving electricity are key to saving energy. Individuals who think others expect them to conserve power and have pro-environmental habits tend to save more energy.
Researchers developed a framework for building trust-based partnerships with Indigenous communities to study microbiomes. They worked closely with Matsés leaders and community members, incorporating cultural differences and transparency into their methods.
Scientists recreated a traditional Balkan yogurt recipe using ants, finding that the insects' natural chemicals and microbes can kickstart the fermentation process. The researchers tested live, frozen, and dehydrated ant products, concluding that only live ants are suitable for yogurt making.
A recent study reveals that large language models have been used in nearly a quarter of corporate press releases in 2024. The researchers found an increasing trend in the use of AI-assisted writing across various sectors, with significant growth in UN and US press releases.
Research highlights that wealthy countries waste more food, but urbanization is narrowing this gap. Global food waste has increased by 24% since 2004, with rising waste in middle-income countries driven by economic growth and urbanization.
A genomic analysis of over 1,200 people from across South Africa reveals how colonial-era European, Indigenous Khoe-San peoples, and enslaved people contributed to the modern-day gene pool. European genes were more common in males, while Indigenous genes were more common in females.
A team of animal behavior experts found that Gifted Word Learner dogs can distinguish between toys used for tugging versus fetching, even when the toys don't share any obvious physical similarities. The dogs were able to remember those categorizations for long periods without prior training.
Scientists found that stretching the skin stimulates immune cells and increases its ability to absorb large molecules, including vaccines. This approach resulted in higher antibody levels against the H1N1 flu antigen compared to traditional needle-free delivery methods.
Researchers found genetic adaptations in response to micronutrient shortages and surpluses, particularly in regions with iodine-poor soils. The study provides insights into the impact of micronutrient availability on human evolution, highlighting potential vulnerabilities to deficiencies as climate change affects soil nutrient levels.
A study published in Cell Host & Microbe found a significant link between the maternal gut microbiome and preterm birth. The researchers identified Clostridium innocuum as a key bacteria species that may contribute to preterm birth by degrading estradiol, a critical hormone during pregnancy.
Researchers create a device that prints bone grafts directly onto fractures and defects using a modified glue gun. The tool enables rapid creation of complex implants without pre-fabrication and demonstrates high structural flexibility, anti-inflammatory properties, and natural bone regrowth.
Researchers developed an acid-resistant hydrogel called ultrastable mucus-inspired hydrogel (UMIH) that improved gastrointestinal wound healing in animal models and outperformed a clinically approved mucosal protectant. UMIH showed 15 times stronger adhesive abilities and remained stable for 7 days in acidic conditions.
A new class of targeted therapy showed promise in treating head and neck squamous cell carcinoma (HNSCC) in pet cats, with 35% of patients experiencing controlled disease. The drug, which targets the transcription factor STAT3, also raised levels of PD-1, a protein associated with an immune response to cancer.
Researchers have created glow-in-the-dark succulents using light-emitting compounds that absorb and release light slowly. The plants can shine in various colors and stay lit for up to two hours after exposure to sunlight or indoor LED light.
A study published in the journal Joule estimates that space-based solar power could reduce Earth-based renewable energy costs by 7-15% and offset up to 80% of wind and solar power by 2050. The heliostat design, with higher potential for continuous solar energy capture, would outperform wind and solar power.
Researchers discovered seabirds, like streaked shearwaters, drop feces every 4-10 minutes while flying to avoid fouling feathers and attracting predators. This unique habit may help the birds stay clean and fertilize the ocean below with nutrient-rich droppings.
Scientists have successfully decoded inner speech using brain-computer interfaces (BCIs) with an accuracy rate of up to 74%. The BCI system can interpret neural activity related to thought processes, allowing individuals with severe paralysis or motor impairments to communicate more naturally and comfortably.
A study found that many low carbon taxes were initially implemented for non-climate reasons, such as generating revenue or meeting international expectations. Despite being ratcheted up over time, only a few countries showed strong evidence of sequencing to increase emissions reduction.
Researchers discovered a brain mechanism behind 'specific musical anhedonia,' where people experience no pleasure from music despite normal hearing and other experiences. Studies using the Barcelona Music Reward Questionnaire support this idea, showing reduced activity in the reward circuit when listening to music.