Researchers have proposed a new scenario for rapid neutron capture process (r-process) nucleosynthesis in common envelope jet supernovae (CEJSNe), producing the greatest abundance of elements heavier than lanthanides. This finding suggests that CEJSNe is critical for explaining the characteristics of r-enhanced metal-poor stars.
Researchers found a choanoflagellate harboring its own microbiome, forming colonies that enclose bacteria and exhibiting a unique symbiotic relationship. This discovery sheds light on the origin of interactions between animals and bacteria in ancient oceans.
A recent study published in EMBO Reports found that embryonic stem cells exhibit high origin activity and slow forks to coordinate replication with cell cycle progression. This challenges the assumption that these cells experience high levels of intrinsic replication stress.
Scientists have identified the Chicxulub impactor as a rare carbonaceous asteroid, shedding light on the mass extinction event that occurred 66 million years ago. The findings suggest that the asteroid's unique composition and extraterrestrial origin are consistent with an outer Solar System origin.
A new study found that bone fracture rates in older women differ dramatically by race, with White women having the highest risk. Hispanic women had a lower risk of 10%, while Asian-American women experienced varying fracture rates depending on their ethnicity. The study highlights the need to better understand factors behind these diff...
Research at the Yumin site in northern China's farming-pastoral zone found evidence of agriculture dating back to around 8,000 years ago. The gradual improvement of hydrothermal conditions since the beginning of the Holocene created an appropriate environment for dryland farming.
A new study reconstructs the global migration history of Phytophthora infestans, challenging the common theory of its Mexican origin. The research found that P. infestans likely originated in the South American Andes and then spread globally.
A new study published in Nature Geoscience presents evidence for the origin of Mars' organic material, revealing that it was formed through atmospheric photochemical reactions without life. The discovery confirms a decade-old theory and provides crucial insights into the formation of life's building blocks.
A genomic analysis overturned the leading hypothesis on firefly light origin, revealing that lucibufagins, a toxic compound, evolved after bioluminescence development. Fireflies' ancestors diversified during a period of rising atmospheric oxygen levels, suggesting a similar path to glowing millipedes.
A USTC research team studied nitrogen isotope fractionation during terrestrial planet formation, finding that both early evolution and late-stage accretion contributed to the silicate Earth's nitrogen abundance. The study sheds new light on the origin of volatiles on our planet.
Research from Stockholm University reveals that marsupials possess a not fully evolved form of brown fat, a crucial finding for understanding the origin and regulation of this heat-producing organ. The study suggests that the gene networks required to enable thermogenesis existed before the divergence of marsupials and placental mammals.
A clinical trial discovered that the drug abrocitinib, approved for eczema treatment, significantly reduced symptoms of patients with severe itching diseases. Abrocitinib improved symptoms in both prurigo nodularis and chronic pruritus of unknown origin by 78% and 54%, respectively.
A team of researchers from Japan have employed an innovative technique to directly observe the origin of FSDP and the atomic density fluctuations in silica (SiO2) glass. The study reveals alternating arrangements of chain-like columnar atomic configurations and interstitial tube-like voids.
Researchers challenge single-origin theory of root nodule symbiosis, identifying multiple origins and ideal experimental systems to better understand symbiotic relationships. The findings suggest a lesser role for shared genetic machinery in genetically engineering crop plants to work with nitrogen-fixing bacteria.
Aggregating patients by broad racial or ethnic groups creates risks for clinical care and research. Recognizing the heterogeneity of lived experiences among LHS populations in healthcare is essential for equitable outcomes.
A study led by Andrea Migliano from the University of Zurich has discovered previously unknown links between culture, language, and genes among different hunter-gatherer populations in Central Africa. The team found that musical instruments were exchanged long before agricultural populations arrived in the region, suggesting extensive ...
A global research team suggests that all eight baobab species originated in Madagascar due to genomic analysis. The most likely scenario is that baobabs dispersed from Madagascar when sea levels were lower, but rising sea levels could hinder their expansion and threaten their populations.
Researchers have developed new methods to authenticate the geographical origin of hazelnuts, including a multi-isotopic approach that uses multiple markers to identify the most promising ones. This simple methodology could be easily transferable to control laboratories and support control bodies in facilitating more efficient controls.
Chinese researchers have discovered huge magnetic toroids in the halo of the Milky Way galaxy using data from pulsars and radio telescopes. The study provides crucial constraints on the origin of cosmic magnetic fields and offers insights into the physics of our galaxy.
The European Union is urged to adopt a balanced, empirically sound approach to regulate substances of human origin. Properly devised rewards increase supply without compromising quality and safety. The EU's new regulation should prioritize self-sufficiency while ensuring safe and accessible supplies for all in need.
Researchers analyzed EU agricultural imports to identify areas of high environmental impact. Trade with MERCOSUR countries, Malaysia, Indonesia, and Papua New Guinea contributes significantly to deforestation and land degradation. The EU can reduce its relevance by regulating demand for sustainable livestock farming or promoting low-me...
The study suggests that graphitisation could provide simplicity and a clean environment required for life, theorising that an object roughly the size of the moon hit early Earth around 4.3 billion years ago, depositing iron and other metals that reacted with water to form useful nitrogen-containing compounds.
A Japanese research team analyzed oxygen and nitrogen stable isotope ratios in nitrate to differentiate between sake breweries. The study found a distinct N isotope signature across various types of sake within a single brewery, which could be used as a marker for authentication.
Researchers found that first-generation, wild-born descendants of hatchery-origin Chinook salmon produced more adult offspring than hatchery-origin salmon, improving reproductive success. This study offers hope for recovering endangered populations using hatchery-origin salmon.
Researchers discovered that known genetic variants account for a large portion of chronic kidney diseases with unknown origin. The study found that 10% of patients had pathogenic variants in CKD-causing genes, and some hereditary renal diseases could be diagnosed and treated early on to slow down disease progression.
A new study has identified the likely origin of tone deafness in the brain, finding that strokes causing amusia affect the right hemisphere and a specific region called the superior temporal gyrus. This discovery highlights the differences between processing music and language in the brain, with implications for diagnosis and treatment.
A study by IRB Barcelona and Sant Joan de Déu Hospital reveals three distinct patterns explaining the occurrence of second cancers in children, including a mutational footprint from chemotherapy. The research advances understanding of pediatric cancer and highlights the importance of clinical data sharing.
Scientists uncover how hydrogen gas, the energy of the future, enabled early life on Earth. Researchers found that iron in hydrothermal vents can split H2 bonds to produce protons and electrons, powering ancient biological processes.
A new study published in Risk Analysis found that COVID-19's origin is unlikely to be natural, using a modified risk assessment tool. The researchers suggest an unnatural origin, potentially from a laboratory, cannot be easily dismissed.
Researchers from the University of Gothenburg developed a new method to identify the origin of harvested trees using chemical footprints in wood tissue. The study focused on Eastern European countries, but the method is applicable worldwide, tackling over half of tropical timber's illegal harvest.
A University of Arizona-led study explores sulfur's significance in the emergence of life on Earth, shedding light on its possible role as an RNA precursor. The research suggests that sulfur's reactivity could have hindered its availability for origin-of-life chemistry.
Researchers at IMBA discovered a parent-of-origin effect in nematodes, suggesting the first step in genomic imprinting's evolution. This finding provides insight into how imprinting arose independently in mammals and plants over 100 million years ago.
Scientists discovered a plausible pathway for the formation of protocells, suggesting that phosphorylation may have occurred earlier than expected. This finding helps understand how early evolution took place and sheds light on the origins of life.
Scientists have discovered a giant ultra-high-energy gamma-ray bubble structure in the Cygnus star-forming region, indicating the presence of a super cosmic ray accelerator. The discovery is the first to reveal the origin of cosmic rays with energy higher than 10 Peta-Electronvolt.
Scientists successfully synthesized pantetheine, a chemical essential for all living things, in lab conditions mimicking early Earth. The compound is crucial for metabolism and may have played a role in the emergence of life on Earth.
A research team has observed and quantitatively characterized the many-body pairing pseudogap in unitary Fermi gases, resolving longstanding debates. This achievement supports pairing as a possible origin of the pseudogap in high-temperature superconductors, advancing our understanding of strongly correlated systems.
A new study proposes that the Seattle fault zone originated from an ancient tear in the continent, with forces exerted by tectonic deformation shaping its history. The researchers mapped bedrock across western Washington and used gravity and magnetic data to test existing hypotheses of the fault's geometry.
A meta-analysis of 221 studies finds that megafauna size and dietary selectivity have stronger effects on plant diversity than species origin. This challenges the assumption that introduced megafauna have greater negative impacts on ecosystems.
Scientists have identified likely 'cells-of-origin' that can grow into breast cancer in women carrying a faulty BRCA2 gene, who are at high risk of developing the disease. The study also showed these cells have potential to be targeted with an existing cancer drug to delay tumour growth.
Researchers have discovered the atomic structure of an RNA replicase using cryogenic electron microscopy, shedding light on a primordial 'RNA world' that kick-started evolution. The study provides structural insight into an ancient RNA machine thought to reside at the origin of life.
A research team studied developing lamprey embryos to clarify the evolutionary origin of the vertebrate skull, finding that the head mesoderm diverged early in evolution. The study challenged long-standing debates on the development and origin of somites, providing new insights into the age-old question.
Studies reveal the evolutionary origin of unique traits in carnivorous pitcher plants, where a composite trapping mechanism emerged through 'spontaneous coincidence' of distinct structural, chemical, and mechanical innovations. Marine snails also evolved new biological functions through the recruitment of many alleles, challenging the ...
Researchers used genomic analyses to map illegal pangolin poaching from Africa to Asia, identifying key hotspots and smuggling routes. The study provides new opportunities to monitor and combat wildlife trafficking, with significant implications for species conservation.
Researchers discovered a mechanism that creates DNA palindromes and new microRNA genes from noncoding sequences, explaining the origin of small regulatory genes. The study found that this process can create novel genes, potentially affecting human health.
A new study has clarified the origin of modern maize by revealing evidence of wild admixture during its initial domestication and dispersal. The findings suggest that a wild relative of teosinte, Zea mays mexicana, contributed genetic traits beneficial for domestication, including photoperiodicity and flowering time.
A new study reveals a nonenzymatic chemical network that could have produced pentoses on early Earth, providing clues about primitive biochemistry. The proposed pathway relies on chemical transformations reminiscent of the pentose phosphate pathway, bringing us closer to understanding the emergence of life.
Researchers analyzed medieval Bavarian teeth to understand childhood nutrition and migration. The study found that people of non-Bavarian origin migrated to the region, and women from south-eastern Europe had unique dietary patterns and artificially modified skulls. Long breastfeeding periods were also common among these women.
Scientists at St. Jude Children's Research Hospital discovered that a fusion oncoprotein forces cells to become tumor-like, regardless of their original muscle or endothelial cell origin. The study suggests that focusing on the effects of this protein may be a better approach for identifying potential therapeutic interventions.
A new conservation tool, Lion Localizer, helps authorities track the origin of illegally traded lion parts by analyzing mitochondrial DNA. The tool provides critical information on population impact and resource allocation, supporting efforts to protect tiny West African lion populations.
Researchers have confirmed that genes associated with East Asian and Native American ancestry explain lighter skin in people of these descent, rather than European genes. This discovery has broad implications for genetic research and the prevention of melanoma, particularly in Europeans.
Studies reveal subtle variations in time and geographical space between Sapiens and Neanderthals. The presence of about 2% of DNA of Neanderthal origin in present-day Eurasians varies slightly between regions.
A recent study found that apoptotic factors in eukaryotes have a bacterial or mitochondrial origin, suggesting conservation over 1.8 billion years. The researchers proposed an alternative scenario where early protoeukaryotes domesticated bacteria to produce toxins, which eventually evolved into apoptotic factors.
A new SwRI study posits that the large mounds on Kuiper Belt object Arrokoth are similar in size and shape, suggesting a common origin. This finding supports the streaming instability model of planetesimal formation, where gentle collision speeds allowed objects to accumulate and form Arrokoth.
Researchers have created an 'immune cell map' that reveals the origin of neutrophils' subcellular response to microbes. The study found that a specific type of glycoprotein is responsible for the restricted subcellular origin, and this discovery may lead to refined personalized immune responses.
Visits to parents' countries of origin during holidays can boost heritage language fluency in bilingual children. Children who attended mainstream school and took additional Greek classes performed better in tests that targeted vocabulary and grammatical structures.
A new AI-based system can detect signs of biological life in samples with high accuracy, enabling the search for life on other planets. The system uses machine-learning methods to analyze data from various sources and predict whether a sample is biological or non-biological.
Scientists have discovered a simple test for signs of past or present life on other planets, using artificial intelligence to distinguish between biological and abiotic samples with high accuracy. The method has the potential to revolutionize the search for extraterrestrial life and deepen our understanding of Earth's earliest life.
A team at UW–Madison has compiled 270 combinations of molecules with the potential for sustained autocatalysis, focusing on comproportionation reactions. This cookbook-like approach may help identify conditions for life elsewhere in the universe, guiding future research.
Researchers at Hokkaido University have discovered a mechanism for carbon atoms to come together on the surface of interstellar ice grains, producing complex organic molecules. This process occurs at temperatures above 30 Kelvin and may have played a role in the origin of life on Earth.
A team of researchers used the Subaru Telescope to discover 162 quasars in the early universe, including 22 that lived less than 800 million years old. The observation provides insights into the origin of supermassive black holes and their relationship with galaxies.