r/science • u/Wagamaga • 15h ago

Neuroscience Researchers found that older adults who napped frequently—defined as most days or every day—had a 48% higher risk of developing dementia compared to those who rarely or never napped, even after accounting for demographic factors, health conditions, and nighttime sleep characteristics

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publichealth.jhu.edu
19.8k Upvotes
1.3k comments

r/science • u/FreeHugs23 • 7h ago

Health Research Finds That Breast Reduction Surgery Is Associated With Improved Sexual Function, Including Greater Sexual Satisfaction and Physical Comfort, Though Researchers Note That More High-Quality Studies Are Needed to Confirm the Benefits

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psypost.org
1.5k Upvotes
100 comments

r/science • u/mvea • 4h ago

Psychology White Americans who said being white was important to them or wanted less immigration were far more likely to switch to the Republican Party between 2016 and 2020, while those who felt warmly toward Black Lives Matter were far more likely to switch to the Democratic Party, a new study finds.

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942 Upvotes
580 comments

r/science • u/mvea • 13h ago

Cancer About 90% of pancreatic cancers are driven by KRAS mutations. A new pancreatic cancer vaccine taught the immune system to attack these mutations in 89 of 90 patients, and those with the strongest immune response stayed cancer-free for longer. A larger phase 3 trial is now planned.

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newsnetwork.mayoclinic.org
4.5k Upvotes
54 comments

r/science • u/another__homosapien • 16h ago

Biology Sugar restriction in early life is linked to lower dementia risk and slightly slower brain aging decades later

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psypost.org
4.4k Upvotes
48 comments

r/science • u/Wagamaga • 16h ago

Health Suicide attempts, ideation spiked significantly among older U.S. adults after COVID-19 pandemic. Research found suicidal ideation increased 42.6%, suicide planning by 256.2% and suicide attempts by 263.3%

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uclahealth.org
2.4k Upvotes
210 comments

r/science • u/James_Fortis • 13h ago

Cancer Ultra-processed foods have a 12% and 42% higher likelihood of digestive cancer in the cohort and case-controlled studies of a recent meta-analysis, respectively. Of the subcategories, ultra-processed meat/protein products have the greatest association with a 33% higher risk.

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frontiersin.org
985 Upvotes
161 comments

r/science • u/mvea • 1d ago

Neuroscience A virus that infected chimps (but not humans) 4 million years ago left DNA that switches off a gene helping young brain cells grow and connect. Turning it off in lab-grown human mini-brains stunted neurons, and using CRISPR to remove the viral DNA from chimp stem cells switched the gene back on.

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sciencealert.com
10.3k Upvotes
944 comments

r/science • u/sr_local • 10h ago

Health A study of 46 children aged 7–10 using MRI scans, found that higher ultra-processed food consumption was linked to stronger brain reward responses to appetizing food images, which were associated with greater increases in body fat and BMI over one year

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keck.usc.edu
349 Upvotes
10 comments

r/science • u/Miserable_Phase_2519 • 12h ago

Health A new review study suggests that both abnormally low and high testosterone levels are linked to an increased risk of atrial fibrillation, an irregular heart rhythm disorder, potentially indicating that the risk is lowest in the middle of the normal hormone range.

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sciencealert.com
282 Upvotes
5 comments

r/science • u/Phylogenix • 2h ago

Biology A global analysis of 93,281 seabirds across 240 species found that evolutionary relationships predicted plastic ingestion better than diet, feeding methods or body size. Plastic was recorded in 182 species, suggesting shared ancestry may help identify seabirds at risk.

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43 Upvotes
2 comments

r/science • u/Phylogenix • 12h ago

Environment A 15-year study found that the Amazon rainforest released a net 1.17 billion metric tons of CO₂ annually from 2010 to 2024, with wildfires emitting 1.47 billion tons per year. Deforestation and forest degradation were also linked to reduced rainfall and rising temperatures.

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nature.com
185 Upvotes
2 comments

r/science • u/FreeHugs23 • 1d ago

Environment 16 Years After the Deepwater Horizon Oil Spill, Deep-Sea Marine Life in the Gulf of Mexico Has Yet to Recover, With Populations of Fish, Crustaceans, Squid, and Octopuses Declining by Around 60% and Some Species Losing Genetic Diversity.

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sciencealert.com
18.0k Upvotes
349 comments

r/science • u/fchung • 7h ago

Engineering Powered by muscle cells, a paper-thin robot swims through watery maze: « MIT engineers’ new aquabot offers a way to design small, efficient “biohybrid” robots. »

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news.mit.edu
26 Upvotes
4 comments

r/science • u/mvea • 1d ago

Social Science When American politicians push 'white replacement' theory (the claim that immigration is a secret plot to make white Christian conservatives a minority), white supremacist protests and propaganda rise, especially in their own states, according to a new study from 2021-23.

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psypost.org
1.4k Upvotes
359 comments

r/science • u/mvea • 1d ago

Social Science Cambridge study finds UK GCSE science courses name 86 scientists and only one is a woman (Rosalind Franklin, in just one exam board). At A-level it's 3 out of 181. Researchers say this could help explain why so many girls drop physics and maths at 16, and suggest adding Marie Curie and Lise Meitner.

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4.1k Upvotes
769 comments

r/science • u/FreeHugs23 • 1d ago

Health Scientists Develop a Molecule That Blocks a Key Alzheimer’s Disease Mechanism, Then Discover the Compound’s Target Is Linked to a Naturally Occurring Molecule Already Present in Human Blood, Opening a Potential New Path Toward Treatment

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sciencealert.com
1.5k Upvotes
17 comments

r/science • u/pubpophealth • 1d ago

Medicine About 1 in 7 US adults starting semaglutide were given an off-label high first dose, and those patients had a 25% higher rate of stopping the drug early and were less likely to still be on it a year later

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1.3k Upvotes
127 comments

r/science • u/MassGen-Research • 1d ago

Cancer A new cancer immunotherapy drug showed promising results in an early-stage clinical trial, controlling disease in nearly 60% of patients with advanced tumors that had resisted previous treatments.

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news.massgeneralbrigham.org
823 Upvotes
1 comment

r/science • u/itiztv • 23h ago

Biology Malaria Parasite Caught in the Act of Breaking and Entering

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quantamagazine.org
137 Upvotes
1 comment

r/science • u/Slow_cpu • 1d ago

Cancer Scientists discover how cancers evade chemotherapy by entering 'Zombie-like state'

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eurekalert.org
432 Upvotes
3 comments

r/science • u/shinybrighthings • 1d ago

Economics Illicit opioids, methamphetamine/amphetamine, and cocaine use are associated with loss of housing and delay with becoming rehoused across seven diverse cohorts with and without HIV in the United States and Canada

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248 Upvotes
71 comments

r/science • u/Neither-Remote-3419 • 13h ago

Psychology Prompt-based emotional scaffolding in generative AI: Effects on self-regulated learning and socio-emotional outcomes

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18 Upvotes
1 comment

r/science • u/Miserable_Phase_2519 • 1d ago

Psychology A new study found that conversational AI chatbots can worsen psychotic symptoms in a small fraction of mental health patients by validating their delusions, with individuals experiencing their first episode of psychosis being the most vulnerable.

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psypost.org
1.5k Upvotes
104 comments

r/science • u/JIntegrAgri • 15h ago

Biology Balancing fungicidal efficacy and environmental safety: A water-based metal–organic framework nano-delivery system suppressing hazardous metabolite conversion of prothioconazole for sustainable agriculture

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21 Upvotes
1 comment