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Personalidad y cerebro: qué dice la ciencia sobre quién eres

Personalidad y cerebro: qué dice la ciencia sobre quién eres

Human personality is a complex phenomenon that has been the subject of study from various perspectives, including biological. The biological basis...
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Yale Study Reveals New Insights into Aging Through Flatworm Research

Yale Study Reveals New Insights into Aging Through Flatworm Research

A recent study conducted by researchers at Yale University has uncovered a novel aspect of aging by examining flatworms, known for their regenerative abilities. The research, led by Andrew Verdesca and published in Current Biology, suggests that age-related decline is not solely due to cellular damage. Instead, it highlights the role of the body's internal positioning system, which directs cellular location, as a significant factor. The study focused on planarians, a type of flatworm that can regenerate and live for extended periods. Despite their longevity, these worms exhibit a brief reproductive lifespan. The researchers discovered that the worms' infertility is not due to the deterioration of reproductive cells but rather a disorganization of their internal structure. This disorganization, termed 'positional drift,' causes reproductive organs to form incorrectly, leading to infertility. By manipulating polarity genes, which are responsible for cellular positioning, the researchers were able to influenc...
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US fertility rates drop to record low in 2025 as births fall

US fertility rates drop to record low in 2025 as births fall

By Mariam Sunny April 9 (Reuters) - The U.S. fertility rate hit a record low last year, extending a nearly two-decade decline, provisional data from the Centers for Disease Control and Prevention showed on Thursday.
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Study Finds Neighborhood Conditions May Accelerate Cellular Aging

Study Finds Neighborhood Conditions May Accelerate Cellular Aging

Research from New York University suggests that living in neighborhoods with limited social and economic opportunities can accelerate cellular aging. The study, published in Social Science and Medicine, analyzed data from over 1,200 American adults, finding that those in low-opportunity areas had higher levels of CDKN2A RNA, a marker of cellular aging. The research highlights the impact of structural conditions, such as employment and housing stability, on biological aging processes. The findings suggest that chronic stress from economic deprivation may be a key driver of cellular aging.
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Autism BrainNet Survey Reveals Public Support for Autism Research but Low Awareness of Brain Donation

Autism BrainNet Survey Reveals Public Support for Autism Research but Low Awareness of Brain Donation

Autism BrainNet has released survey results highlighting a significant gap between public support for autism research and awareness of brain donation's role in advancing scientific discoveries. The survey, conducted with 1,007 respondents, found that while 92% believe analyzing the autistic brain is crucial, 70% had never heard of brain donation. This disconnect suggests a lack of understanding about the importance of brain donation in autism research. The survey also revealed that while over 80% of respondents are familiar with organ donation, only 15% know that brain donation requires a separate process. Autism BrainNet emphasizes the critical role of postmortem brain tissue in research, which cannot be replicated by other means. The organization aims to increase awareness and comfort with brain donation through public education efforts, including an upcoming Reddit AMA session.
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trRosettaRNA Server Enhances RNA Structure Prediction Using Deep Learning

trRosettaRNA Server Enhances RNA Structure Prediction Using Deep Learning

The trRosettaRNA server is a newly developed web-based platform for automated RNA 3D structure prediction using deep learning. It allows users to input nucleotide sequences of target RNA, with options for custom multiple sequence alignments and secondary structures. The server employs an end-to-end neural network for 3D structure prediction, followed by energy optimization to resolve structural violations. This platform is noted for its modeling accuracy, flexible input options, and comprehensive visualization capabilities. It has been successfully applied in various contexts, including predicting structures for Rfam families lacking known 3D structures, aligning well with experimental observations.
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Scientists Reclassify World's Oldest Octopus Fossil as Nautilus Relative

Scientists Reclassify World's Oldest Octopus Fossil as Nautilus Relative

A 300-million-year-old fossil previously identified as the world's oldest octopus has been reclassified as a relative of the nautilus. The fossil, known as Pohlsepia mazonensis, was found in Illinois and initially thought to be an octopus, challenging previous understandings of octopus evolution. However, recent research led by University of Reading zoologist Thomas Clements used advanced imaging techniques to reveal features inconsistent with octopuses, such as a radula with 11 teeth, compared to the seven or nine found in octopuses. This discovery has led Guinness World Records to retract its listing of Pohlsepia mazonensis as the earliest known octopus.
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23andMe Study Identifies Genetic Variants Affecting Obesity Drug Efficacy and Side Effects

23andMe Study Identifies Genetic Variants Affecting Obesity Drug Efficacy and Side Effects

A study conducted by the research arm of genetic testing company 23andMe has identified genetic variations that influence the effectiveness and side effects of GLP-1 agonist-based weight-loss drugs. The study analyzed the genomes of nearly 28,000 users of these drugs, including Novo Nordisk's Wegovy and Eli Lilly's Zepbound. Researchers found a missense variant in the GLP1R gene associated with greater weight loss and multiple variants in the GIPR gene linked to increased susceptibility to side effects like nausea and vomiting. These findings, published in the journal Nature, suggest that genetic testing could help tailor weight-loss treatments to individual patients, enhancing efficacy and safety.
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Scientists say the world's oldest octopus fossil isn't an octopus after all

Scientists say the world's oldest octopus fossil isn't an octopus after all

Scientists have found evidence that a 300-million-year-old sea creature previously thought to be the world's oldest octopus is actually a nautilus relative
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Behavioral Scientists Link Loneliness and Self-Absorption as Interconnected Issues

Behavioral Scientists Link Loneliness and Self-Absorption as Interconnected Issues

Behavioral Scientists Link Loneliness and Self-Absorption as Interconnected Issues
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AI-Driven Discovery of Antimicrobial Peptides from Extreme Environments Promises New Antibiotics

AI-Driven Discovery of Antimicrobial Peptides from Extreme Environments Promises New Antibiotics

Researchers have utilized artificial intelligence to identify antimicrobial peptides from microorganisms inhabiting Earth's extreme environments, as detailed in a recent study published in Nature Communications. The study introduced the Extreme Environment Microbiome Catalog (EEMC), a comprehensive resource that reconstructs over 78,000 genomes from diverse extreme habitats, such as deep-sea vents and cryospheric systems. This catalog has enabled the identification of thousands of candidate antimicrobial peptides (cAMPs), many of which show activity against difficult-to-treat Gram-negative pathogens. The research highlights the potential of these peptides as next-generation antimicrobials, addressing the critical issue of antimicrobial resistance and the slowdown in antibiotic discovery.
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Harvard Study Highlights Importance of Exposome in Health Outcomes

Harvard Study Highlights Importance of Exposome in Health Outcomes

Researchers from Harvard Medical School have conducted a large-scale study examining the exposome, which encompasses all environmental exposures a person experiences throughout their life. The study analyzed over 100,000 associations between various exposures and health outcomes, revealing that while individual exposures have moderate effects, their cumulative impact can be as significant as genetic factors. The findings emphasize the need for comprehensive research on environmental risks to better understand their role in health and disease.