Researchers analyzed data from over six million people to see how close residents lived to cannabis retailers. Neighborhoods near these shops experienced higher cannabis-related emergency visits compared with those farther away. The effect was strongest where multiple stores were packed into small areas. These trends suggest that store density plays a meaningful role in community health.

Researchers found that repeated head impacts can disrupt a key system that helps the brain wash away waste. In professional fighters, this system initially seems to work harder after trauma, then declines over time. MRI scans revealed that these changes may show up years before symptoms do. The work could help identify at-risk athletes earlier in their careers.

A large-scale Brazilian study found dangerous levels of toxic metals in popular children’s toys, with barium and lead topping the list. Researchers used sophisticated lab methods to identify 21 hazardous elements and test how easily they could be released when toys are mouthed. Even though only small fractions leach out, the total concentrations were so high that safety concerns remain critical.

A major review across 73 countries finds that access to antiseizure medications is rising, but safe prescribing isn’t keeping pace. Valproate—linked to serious birth defects—remains widely used in many regions despite WHO warnings. Limited access to newer drugs means millions may still be at risk. Researchers urge global education and stronger safeguards.

Researchers have directly observed Floquet effects in graphene for the first time, settling a long-running scientific debate. Their ultrafast light-based technique demonstrates that graphene’s electronic properties can be tuned almost instantaneously. This paves the way for custom-engineered quantum materials and new approaches in electronics and sensing.

ETH Zurich scientists have found the holy grail of brewing: the long-sought formula behind stable beer foam. Their research explains why different beers rely on different physical mechanisms to keep bubbles intact and why some foams last far longer than others.

Scientists have identified new anti-aging compounds produced by a little-studied blood bacterium. These indole metabolites were able to reduce inflammation, oxidative stress, and collagen-damaging activity in skin cell cultures. Three of the compounds, including two never seen before, showed particularly strong effects. The findings hint at a surprising new source for future skin-rejuvenation therapies.

Researchers have finally assigned a strange 3.4-million-year-old foot to Australopithecus deyiremeda, confirming that Lucy’s species wasn’t alone in ancient Ethiopia. This hominin had an opposable big toe for climbing but still walked upright in a distinct style. Isotope tests show it ate different foods from A. afarensis, revealing clear ecological separation. These insights help explain how multiple early human species co-existed without wiping each other out.

Princeton researchers found that the brain excels at learning because it reuses modular “cognitive blocks” across many tasks. Monkeys switching between visual categorization challenges revealed that the prefrontal cortex assembles these blocks like Legos to create new behaviors. This flexibility explains why humans learn quickly while AI models often forget old skills. The insights may help build better AI and new clinical treatments for impaired cognitive adaptability.

Data from over 47,000 dogs reveal that CBD is most often used in older pets with chronic health issues. Long-term CBD use was linked to reduced aggression, though other anxious behaviors didn’t improve. The trend was strongest among dogs whose owners lived in cannabis-friendly states.

Researchers discovered why bird flu can survive temperatures that stop human flu in its tracks. A key gene, PB1, gives avian viruses the ability to replicate even at fever-level heat. Mice experiments confirmed that fever cripples human-origin flu but not avian strains, especially those with avian-like PB1. These findings highlight how gene swapping could fuel future pandemics.

Long-term inhalation of toxic air appears to dull the protective power of regular workouts, according to a massive global study spanning more than a decade and over a million adults. While exercise still helps people live longer, its benefits shrink dramatically in regions with heavy fine particle pollution—especially above key PM2.5 thresholds common in many parts of the world. The researchers emphasize that outdoor activity shouldn’t stop, but better air quality could unlock far greater health gains.

Warming up significantly improves muscle performance, particularly speed and power, by increasing muscle temperature. Both passive heat methods and light exercise warm-ups work, but mimicking the actual workout movements can offer extra benefits. When your body starts to feel coordinated and lightly sweaty, you’re ready to push into the main session.

Researchers identified a new, sticky form of mitochondrial DNA damage that builds up at dramatically higher levels than in nuclear DNA. These lesions disrupt energy production and activate stress-response pathways. Simulations show the damage makes mtDNA more rigid, possibly marking it for removal. The finding offers fresh clues to inflammation, aging, and diseases such as diabetes and neurodegeneration.

Chronic cannabis use is increasingly linked to recurring bouts of vomiting, now officially classified as cannabis hyperemesis syndrome. The new ICD code helps doctors identify cases more consistently and gives researchers a clearer picture of how often it occurs. Patients often resist the diagnosis, and the condition’s causes remain murky. Relief can come from unusual sources like hot showers or capsaicin cream.

Using intense X-rays, researchers captured a buckyball as it expanded, split and shed electrons under strong laser fields. Detailed scattering measurements showed how the molecule behaves at low, medium and high laser intensities. Some predicted oscillations never appeared, pointing to missing physics in current models. The findings create a clearer picture of how molecules fall apart under extreme light.

A 20-year project in Bangladesh reveals that lowering arsenic levels in drinking water can slash death rates from major chronic diseases. Participants who switched to safer wells had the same risk levels as people who were never heavily exposed. The researchers tracked individual water exposure with detailed urine testing. Their results show how quickly health improves once contaminated water is replaced.

Human development and climate-driven sea level rise are accelerating global beach erosion and undermining the natural processes that sustain coastal ecosystems. Studies reveal that urban activity on the sand harms biodiversity in every connected zone, magnifying worldwide erosion risks.

The study reveals that widely used heart-attack risk calculators fail to flag nearly half of those who will soon experience a cardiac event. Even the newer PREVENT model misclassifies many patients as low-risk. Since most people develop symptoms only within 48 hours of their heart attack, current screening offers little time for intervention. Researchers say earlier detection with imaging could dramatically improve prevention.

Spermine, a small but powerful molecule in the body, helps neutralize harmful protein accumulations linked to Alzheimer’s and Parkinson’s. It encourages these misfolded proteins to gather into manageable clumps that cells can more efficiently dispose of through autophagy. Experiments in nematodes show that spermine also enhances longevity and cellular energy production. These insights open the door to targeted therapies powered by polyamines and advanced AI-driven molecular design.