SCIENCES ENERGIES ENVIRONNEMENT

 

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Here is your customized Science X Newsletter for week 41: Why some people are good at math while others struggle Across 122 test batteries, fluid reasoning and comprehension knowledge were consistent predictors of mathematics skills. Number sense was also a strong foundation for later math performance, indicating that general cognitive abilities alone do not fully explain math ability.   Key driver of aggressive prostate cancer identified, suggesting new way to reverse drug resistance Levels of tRNA1Arg(UCU) were lower in androgen receptor–independent, treatment-resistant prostate tumors. Restoring this tRNA in experimental models shifted cancer cells toward androgen receptor dependence and restored sensitivity to receptor-targeted therapy.   High blood pressure can accelerate osteoarthritis joint damage via a newly identified hormone pathway Hypertension was associated with osteoarthritis in humans and accelerated cartilage loss in mice through AVP–AVPR1A–NR4A3 signaling. This pathway increased cartilage-degrading enzymes and suppressed cartilage synthesis. AVPR1A deletion or local receptor blockade prevented hypertension-driven damage in mice, whereas standard blood pressure medication did not improve cartilage.   Giant tortoises outnumber people in Seychelles, with nearly 183,000 on Aldabra Aldabra Atoll supported an estimated 183,000 adult and subadult giant tortoises, with a relatively stable population during 2018–2022. Modeling accounted for undetected animals, so the higher estimate does not imply a doubling since 1999. Climate change and invasive cats and rats remain threats.   Nature's capacity to 'bounce back' when species are lost is vastly overestimated, global analysis finds Across 423 studies, most ecosystem functions and services increased with biodiversity without leveling off, suggesting functional redundancy has been overestimated. Marine carbon sequestration showed the strongest response, but evidence was limited. Hazard protection was less diversity-dependent, often relying on a few foundational species.   Viewing honey bee colonies as superorganisms could reshape beekeeping practices A proposed superorganism framework treats a honey bee queen and her colony as a single organism undergoing development, reproduction and aging. It interprets swarming as parental care and argues that forced queen replacement and swarm prevention conflict with natural reproduction and parasite defenses.   Gut bacteria reveal ancient ties to human migrations across continents, genetic analysis suggests Hadza and Tsimane gut microbiomes share 1,231 bacterial species, about 60% of which are rare or absent in industrialized populations. Genomic divergence estimates for many shared lineages align with ancient human migrations, supporting long-term associations with humans. The health consequences of this microbial diversity loss remain unresolved.   Tiny ancient black holes may live in a five-dimensional world In a theoretical model with one extra spatial dimension, some primordial black holes initially behave as four-dimensional objects before becoming unstable and transitioning to five dimensions. Those formed from cosmic strings would be five-dimensional from birth and could survive for the age of the universe. Neither primordial black holes nor the extra dimension has been observed.   Puerto Rico specimen reveals new giant isopod species that went unrecognized for decades A 32.2-cm isopod collected in Puerto Rico in the 1980s was identified as the new species Bathynomus tuebingoborikensis, closely related to a species off Mexico’s Yucatán Peninsula. Phylogenetic analysis supports a Gulf of Mexico origin for the genus over 15 million years ago, followed by oceanic dispersal and diversification.   Columbus' own writings reveal how tightly religion and conquest were intertwined from the start Columbus’ writings linked territorial conquest and the pursuit of wealth to Christian conversion from his first voyage in 1492. His later Book of Prophecies framed his voyages as divinely ordained. This religious justification accompanied Indigenous enslavement and shaped subsequent European colonization of the Americas.   Lightsaber-like plasma antenna uses laser-ionized air to transmit radio waves A laser-generated plasma filament in air transmitted radio waves at 30 MHz using a contactless capacitive feed. Laser parameters control filament length, enabling antenna adjustment without mechanical deployment. Reception and transmission across a broad frequency range remain un demonstrated.   Endocrinologist discusses life-or-death stakes of weak bones and how to protect against devastating falls Hip fractures mainly affect older adults with low bone density, often follow falls, and are associated with approximately 22% mortality within one year. Osteoporosis screening, effective medications, and fall prevention can reduce fracture risk. Many high-risk patients remain untreated despite available therapies.   Yosemite's meadows can be restored, but it will take time and effort Planting 40,000 native sedge seedlings in Yosemite’s Tuolumne Meadows increased soil organic matter over three years. However, continued decomposition left the meadow a net carbon source. Restoring deep-rooted native vegetation may limit further degradation, but recovery will be slow.   Vanillin provides a sweet solution for chronic wound healing Vanillin has antioxidant, anti-inflammatory and antibacterial properties relevant to wound-care formulations. Its interactions with reactive oxygen species, membranes and polymers support multifunctional material design, while low-cost synthetic production offers advantages for manufacturing scale-up.   Helping others linked to younger-looking adult brains, even after accounting for health and lifestyle Greater time spent providing emotional and practical support was associated with younger MRI-estimated brain age relative to chronological age in U.S. adults. The association persisted after adjustment for health, lifestyle, demographics and received support. These observational results do not establish that helping others slows brain aging or prevents disease.   Scientists uncover recurrent patterns within chaotic quantum behavior A quantum–classical feedback protocol identified and stabilized recurrent motion in a 24-qubit superconducting system amid chaotic many-body dynamics. Regions of regular motion changed with qubit interactions, demonstrating coexistence of order and chaos using short evolution periods and single-qubit measurements.   How pond algae led to a Nobel prize and a new way to study the brain Channelrhodopsin, a light-gated ion channel in Chlamydomonas algae, enables optogenetic control of genetically modified neurons. This allows precise tests of neural circuit function, including reactivation of fear memories in mice. Early clinical trials in retinal degeneration have demonstrated partial restoration of vision.   Anthropogenic warming reorganizes North Atlantic atmospheric circulation patterns In a 100-member climate-model ensemble under high emissions, anthropogenic warming reorganized North Atlantic circulation regimes after about 1995 without changing their number. Pressure centers shifted northward, while internal variability declined. The North Atlantic Oscillation shifted toward positive phases for most of the 21st century, with reduced variability.   IVF-conceived children show more 'jumping gene' DNA, study finds Children conceived by IVF or ICSI had more LINE-1 DNA than naturally conceived children, with no significant difference between IVF and ICSI. Insertion or deletion frequencies differed at 25 sites near disease-associated genes. These findings do not establish that IVF caused the genomic differences or increased disease risk.   Simple math formula predicts when AI chatbots will go rogue A mathematical model based on an effective attention head predicted shifts from acceptable to potentially harmful AI responses in 18 of 19 test cases across seven open models. Reordering identical questions changed response safety, indicating that conversation history can influence these transitions.