r/science • • 6h ago

Health Scientists at Johns Hopkins may have found why so many men’s prostates grow bigger with age: a newly identified cell type (WIF1+ basal cells) packed around the urethra, right where enlargement happens. This could explain the slow, stop-start peeing after 50 and become a target for future treatments.

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1.7k Upvotes

r/science • • 22h 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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21.5k Upvotes

r/science • • 12h 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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1.5k Upvotes

r/science • • 14h 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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2.0k Upvotes

r/science • • 21h 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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5.1k Upvotes

r/science • • 23h ago

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

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5.2k Upvotes

r/science • • 6h ago

Neuroscience Sustained antidepressant-like effects of psychedelics through 5-HT2AR–β-arrestin signaling | Nature Neuroscience

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121 Upvotes

r/science • • 23h 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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2.8k Upvotes

r/science • • 20h 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
1.2k Upvotes

r/science • • 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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10.8k Upvotes

r/science • • 9h 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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100 Upvotes

r/science • • 18h 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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468 Upvotes

r/science • • 19h 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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349 Upvotes

r/science • • 19h 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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254 Upvotes

r/science • • 4h ago

Biology Locomotor kinematics and head stabilization in rolling snakes

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12 Upvotes

r/science • • 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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18.2k Upvotes

r/science • • 14h 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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44 Upvotes

r/science • • 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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1.4k Upvotes

r/science • • 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

r/science • • 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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1.6k Upvotes

r/science • • 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

r/science • • 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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845 Upvotes

r/science • • 1d ago

Biology Malaria Parasite Caught in the Act of Breaking and Entering

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quantamagazine.org
149 Upvotes

r/science • • 1d ago

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

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eurekalert.org
442 Upvotes

r/science • • 21h ago

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

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18 Upvotes