The Physicians Committee for Responsible Medicine has filed complaints with OHSU, the USDA, and NIH, asking for an invasive reproductive experiment on nonhuman primates to be shut down due to cruelty and scientific unnecessaryness. The experiment aims to investigate how chronic THC use affects fertility in primates.
The study reveals that animal behavioral diversity is at risk due to declining biodiversity, which can be linked to human activities. Preserving cultural behaviors, such as tool use in primates, could aid in developing comprehensive conservation strategies.
Researchers discovered how monkeys produce 'voice breaks' and 'ultra-yodels' using their vocal membranes, which allow for a wider range of calls. These unique vocalizations enable monkeys to communicate in different ways, particularly in complex social lives.
Researchers have developed a nonviral gene delivery system to introduce transgenes into cynomolgus monkeys, expanding the use of genetic models for human disease research. The piggyBac transposon system allows for precise selection of modified embryos and flexible expression control.
Researchers compared cortical organization between humans and macaques, as well as humans and chimpanzees, to identify distinctively human neuroanatomical features. Unique prefrontal cortex organization and connections between brain regions associated with emotional regulation, social cognition, and language processing were found.
Researchers discover edonerpic maleate enhances neural plasticity, supporting cortical reorganization and improving motor control in non-human primates with SCI. The compound promotes AMPA receptor movement to areas responsible for motor control, strengthening existing neural connections.
A groundbreaking study led by CUNY researcher Stephen Chester uncovers the anatomy, lifestyle, and evolutionary connections of Mixodectes pungens, a mysterious 62-million-year-old mammal. The discovery reveals the species was close to humans and other primates on the evolutionary tree.
Researchers at La Jolla Institute for Immunology have discovered a human antibody called mAb 3A6 that may prove useful against deadly outbreaks. The antibody was isolated from an Ebola survivor and found to block infection by binding to the viral stalk, offering protection at a very low dose.
Researchers at UCL conducted a study on wild Chacma baboons, finding they didn't recognize themselves in mirrors. The baboons showed curiosity with laser marks on visible body parts but not when the mark appeared in their mirror reflection. This strengthens evidence that monkeys do not recognize their own reflections.
Researchers found that human cells have higher gene expression rates compared to chimpanzees, with 5-10% of genes showing significant differences. Human glial cells, particularly oligodendrocytes, showed the greatest variations in gene expression, suggesting a link to human brain complexity.
Researchers found that monkeys swiftly identify snakes because of snake scales as a visual cue, revealing an evolutionary adaptation for threat detection. This insight into primate vision and brain evolution can improve our understanding of animal cognition.
A new method reveals a complete timetree of primates, including over 450 species, after aggregating untimed and timed phylogenies. This comprehensive tree represents the most complete description of primate evolution to date, enabling further research in fields like biogeography and conservation.
Wild chimpanzees remember the location of underground army ant nests, using spatial memory to recall their exact position. They also modify their behavior based on previous encounters with the insects, utilizing episodic-like memory to distinguish between visits where ants were present and those where they weren't.
A Northwestern University study found that gut microbes from large-brain primate species, such as humans and squirrel monkeys, can increase energy production in mice, while those from small-brain species like macaques store more energy as fat. This suggests a link between the microbiota and brain evolution.
Researchers used 3D technology to study key areas in brachiating primates, providing new insights into human evolution. The study confirms that early hominin species combined bipedal locomotion with arboreal locomotion similar to current bonobos.
Researchers at DGIST have developed a fully embedded wireless brain neural signal recorder that enables real-time recording of brain neural signals in non-human primates. The system uses wireless power transmission and communication to record brain activity during natural behaviors, such as eating or moving freely.
A new review highlights the differences in brain aging and Alzheimer's disease between humans and non-human primates, revealing that primate brains are more resistant to aging-related damage. The study suggests that tau tangles play a critical role in Alzheimer's progression, challenging the amyloid cascade hypothesis.
A new Harvard study finds humans possess higher metabolic rates than primates and apes, allowing for bigger brains, longer lifespan, and increased reproduction. Humans have 'escaped a tradeoff' between resting and active metabolism due to unique sweating ability.
A majority of respondents ascribed emotions to most non-human primates, mammals, birds, cephalopods, and fish. The survey also explored the risks of anthropomorphism and anthropodenial in animal behavioral research.
Scientists at UC Davis have identified new clusters of cells with differing gene expression patterns in the human and non-human primate amygdala. These findings suggest that alterations in specific cell types may contribute to disorders such as anxiety, and could lead to more targeted treatments.
Researchers studied female crested gibbon dances, discovering they display a grouping structure, rhythm, and are used for visual communication, including non-sexual arousal or frustration. The dances have similarities with human movements but likely evolved independently, suggesting an innate component.
A recent study published in PNAS found that Japanese macaques do not experience maternal mortality during childbirth despite having a similar pelvis-to-head ratio to humans. The researchers believe that the flexibility of their pelvic girdle and birth dynamics may be key factors contributing to this lack of risk.
Research in north-eastern Bangladesh found Phayre's langurs and capped langurs interbreeding, with genetic confirmation of hybridization. The study highlights the urgent need for forest protection and research to develop suitable conservation strategies.
Researchers have identified hundreds of genes and microproteins specific to human hearts, which are also abnormally expressed in heart failure. These findings provide new insights into cardiac disease and suggest potential targets for therapy.
Researchers found that distinct brain pathways from the orbitofrontal cortex are necessary for experience-based and knowledge-based adaptation. The findings have implications for understanding individual differences in thinking styles and may lead to personalized strategies for improving decision-making skills.
Researchers found that metformin alleviates human cellular senescence, slowing down aging in primates. The study reveals that extended therapy yields geroprotective benefits, including cognitive improvements and rejuvenation of various tissues and organs.
Researchers from King's College London found that the lateral fabella, a sesame seed-sized bone in the knee, evolved differently in humans than most primates. This distinct evolutionary pathway may have helped early humans walk upright and could be an example of exaptation.
A new mpox mRNA vaccine has shown improved responses in nonhuman primate models, reducing symptoms and disease duration compared to a currently licensed modified vaccinia Ankara (MVA) vaccine. The investigational vaccine resulted in fewer lesions, shorter disease duration, and lower viral shedding.
A new study reveals that primate ornamentation plays a crucial role in communication between groups, reducing intergroup aggression. The research found that species with overlapping home ranges display more vibrant colors, which enable quick assessments of potential rivals.
Researchers found that lemurs integrate sensory information with ecological and social knowledge to locate hidden fruit. The animals' ability to remember the location of the fruit weeks later demonstrates their complex cognitive abilities.
Researchers developed a universal influenza vaccine that targets the internal structural proteins of the virus, providing lifetime immunity against evolving viruses. Six out of 11 nonhuman primates inoculated with the vaccine survived exposure to the H5N1 virus, while unvaccinated primates succumbed to the disease.
Researchers at NIH have identified a new brain circuit in primates that quickly detects faces, which could help explain how humans develop facial recognition skills. The discovery sheds light on the neural mechanisms underlying face detection and recognition, potentially providing insights into conditions like autism.
Researchers found same-sex behavior in primates is common, yet underreported due to perceived rarity, according to an online expert survey. The study suggests that experts often overlook this phenomenon because they believe it's rare.
A team of researchers from Japan has successfully developed a noninvasive method to measure heart rates in chimpanzees using millimeter-wave radar technology. The technique involves emitting high-frequency electromagnetic pulses at the chest of the animal, capturing echoes, and analyzing subtle body movements to estimate heart rate. Th...
A study comparing human hearts to those of great apes has found that the human heart is more streamlined due to higher demands for blood flow and thermal regulation. This suggests that human hearts may have evolved differently from their primate ancestors in response to unique ecological pressures.
The study reveals remarkable variation between primate Y chromosomes, showing rapid evolution and previously unstudied regions. The researchers found that over 90% of ape X chromosome sequences aligned to the human X chromosome, while only 14-27% of ape Y chromosome sequences aligned to the human Y chromosome.
A study in the Panamanian rainforest found that larger-brained primates did not outperform smaller-brained mammals in finding fruit. The research suggests that intelligence may not be directly linked to foraging efficiency, but could be related to other factors such as episodic memory or social complexity.
Researchers have revealed the intricate vocal patterns of Bornean orangutans, shedding light on their complex social behaviors and vocal communication. The study identified three distinct pulse types in their long calls, which play a crucial role in their communication across vast distances.
Researchers have discovered that activating the locus coeruleus, a brain structure producing norepinephrine, improves visual sensitivity in non-human primates. The study used optogenetics to selectively boost LC activity, resulting in drastic enhancements in performance on a visual attention task.
Researchers emphasize that field stations studying primates contribute to biodiversity conservation by deterring poaching, deforestation, and natural resource extraction. The authors call for increased funding and support for red colobus conservation efforts.
Researchers discovered lemurs possess an additional pair of vocal folds, which they believe is responsible for enriching their vocal repertoire and allowing them to exaggerate their size. This adaptation may have provided a selective advantage in competition for territory or mates.
A groundbreaking study demonstrates that intradermal administration of naked mRNA induces robust vaccination against SARS CoV-2 in mice and primates. The novel approach avoids the use of lipid nanoparticles, which can cause adverse reactions, allowing for multiple doses over a lifetime.
Researchers sequenced RNA transcripts from 18 primate brains to map every expressed gene, revealing remarkable variation in humans and chimps compared to other primates. The study identifies specific genes for further research and sheds light on human neurodegenerative disorders.
Researchers have discovered that baboons are opportunistic foragers, eating antelope faeces when food is scarce. Camera collars provided an unprecedented view of their interactions with unhabituated wildlife like banded mongooses and impala.
Researchers studied female Assamese macaques for eight years, finding that social networks decrease with age due to physical limitations and a desire to protect themselves from predators. The study's findings shed light on the biological roots of social aging in humans.
A team of researchers has developed a reliable method to define bacterial species and strains by analyzing genetic diversity. The study found that natural gaps in genetic diversity can be used to differentiate between species, with members of the same species showing high levels of genetic relatedness.
Scientists trained AI models on brain activity data from mice to detect hippocampal ripples, a biomarker of memory, epilepsy, and Alzheimer's disease. The model toolbox can be applied to non-human primate and human data with similar recording techniques.
Studies reveal how primates modify behaviors to care for themselves and others despite physical disabilities. Behavioral flexibility is crucial, allowing them to adjust species-typical behaviors and innovate new ways to participate in daily activities.
A team of researchers, led by Jordan Crowell and Stephen Chester, used modern CT scan technology to analyze the only known preserved picrodontid skull, revealing that they are not closely related to primates. The study highlights the importance of revisiting old specimens with updated techniques to examine them.
A study published in PNAS found that 70 million years ago, primates' ancestors mostly lived in pairs, with only 15% opting for solitary lifestyles. This flexible pair-living ancestor likely offered benefits such as easier reproduction and thermoregulation.
A new study identifies the distinct neural circuits responsible for balancing risk vs. reward-return decision-making in primates using optogenetics. The ventral part of Brodmann area 6V is found to be crucial for high-risk, high-reward choice behavior.
A recent study suggests that many nocturnal Strepsirrhines live in pairs of males and females, challenging the long-held assumption that these primates are solitary. Researchers found that pair-living was the most common social organization among ancestors 70 million years ago.
A University of Otago-led study found that early primates primarily consumed soft fruits, as indicated by dental chipping patterns and cavities. The research, published in the American Journal of Biological Anthropology, analyzed fossils from the Fayum Depression in Egypt and compared them to data from living primates.
A new hypothesis suggests that fermentation of cached food provided a more accessible form of nourishment, fueling the growth of larger brains in human ancestors. This idea is supported by the fact that the human large intestine is proportionally smaller than other primates and fermented foods are found across cultures.
Researchers have discovered that short-lived mice and longer-living primates develop brain synapses on the exact same timeline, sparking a reevaluation of human brain development. This finding challenges existing knowledge and may have significant implications for understanding neurodevelopmental disorders such as autism.
Researchers found that humans are born with brains at a typical development level for similar primate species, but grow much larger and more complex after birth. This challenges the prevailing understanding of evolutionary human brain development.
A team of neuroscientists discovered that people who are blind can recognize basic faces using the fusiform face area, a region crucial for face processing in sighted individuals. The researchers used a device that translates images into sounds to study brain activity.
Researchers discover a unique gene, ZNF808, crucial for human pancreas development, contrasting with its absence in other animals. This finding could aid the search for a Type 1 diabetes cure by understanding how humans differ from other species.
Researchers used AI models to analyze rat brain cells and found they can process high-level visual information like primates. This discovery sheds light on the visual system of rodents and has implications for understanding neurodegenerative disorders.
Researchers in China have reported the groundbreaking achievement of creating a live birth of a chimeric monkey using embryonic stem cell lines. The study demonstrates the ability of these cells to differentiate into various tissues in vivo, opening up new possibilities for genetic engineering and species conservation. Analysis reveale...