Reddit science
1A clinical trial has found that hydrodissection, injecting saline to separate a trapped nerve from surrounding tissue, provides carpal tunnel relief lasting up to 6 months, outperforming standard steroid injections.
- Saline injections around the trapped nerve in carpal tunnel syndrome, a procedure called hydrodissection, appear to relieve symptoms longer than steroid injections. In a small trial of 63 wrists, relief lasted six months, while steroid-only benefits faded. Larger studies are needed.
Terminology and mechanism
Commenters debate whether "hydrodissection" is a misleading name, and one clinician explains it separates the nerve from surrounding tissue using hydrostatic pressure, unlike hydrodilatation in frozen shoulder.Surgery versus injections
Many argue carpal tunnel release surgery is quick, low-risk, and highly effective, so repeated injections or alternatives may only delay it, though some note complications and access barriers.Use for other conditions
Users ask about trigger finger, tarsal tunnel, sciatica, back, and other nerve problems, but one reply says trigger finger is an inflammation issue, so the technique is unlikely to help it.
2New eye-tracking study finds men spend longer looking at attractive faces only if they're the sex they're attracted to, but women look longer at attractive faces of both men and women. And being in a long-term relationship didn't stop people from lingering on good-looking faces either.
- Men look longer at attractive faces matching their sexual orientation, while women look longer at attractive faces of either sex. The bias appears in deliberate, sustained viewing rather than the first automatic glance, and relationship status does not stop people from looking longer at attractive faces.
Appreciating beauty without sexual attraction
Many commenters say they admire attractive people of any sex without sexual interest. Some argue that women appreciating beauty in both sexes doesn't mean attraction, and that men face stigma about looking at other men.Skepticism about the study's effect size
Commenters question the sample of 102 and the 2.7% gender difference. They note that the data lacks variance figures and that the effect seems too small to matter in real life.Stigma and social factors shaping gaze
Some attribute the gap to homophobia, since men may avoid looking at other men for fear of seeming gay. Others suggest women compare themselves to others more, or that the findings reflect cultural conditioning.
3One-quarter of the world’s data centers are located in areas where water demand exceeds supply for at least one month each year. Unlike energy, which can come from far away, water for these facilities comes from nearby rivers, lakes, and aquifers whose levels vary seasonally or annually.
- One-quarter of the world's 9,347 operational data centers sit in areas where water demand exceeds supply for at least a month yearly, and a new study projects this could rise to one-third under future warming. Most added stress falls in the U.S., and researchers urge local water planning.
Open loop cooling should be banned
Commenters argue open-loop systems that dump fresh water are wasteful and should be banned, while closed-loop systems need only occasional top-ups. Others note closed loops shift water use to power plants.Siting data centers in water-stressed regions
Users question building data centers in Texas rather than cold northern regions. Replies cite tax breaks, cheap land, fast approvals, grid independence, and latency needs, while critics call the cold-climate idea impractical.Data center water use in context
Many argue data centers' water use is small compared with agriculture, such as almonds, alfalfa, and dairy, and that most facilities are moving to closed-loop cooling.
4A new study found that HSV-1, the virus that causes cold sores, can reprogram the brain’s immune cells, potentially linking viral infection to chronic inflammation and increased vulnerability to Alzheimer’s disease.
- Researchers at CU Anschutz found that herpes simplex virus type 1 (HSV-1), which causes cold sores, activates antiviral defenses in brain immune cells called microglia while reducing their maintenance functions. This shift may link viral infection, chronic inflammation, and Alzheimer's disease, though a causal role has not been established.
Viral infections and long-term damage
Commenters argue viral infections are rarely benign and cite long-term risks, with some linking COVID's cumulative damage and poor air quality to worse outcomes. Others note HSV spreads by skin contact, not air.Skepticism about the study's findings
Several users caution that this was a preclinical mouse study that doesn't prove cold sores cause Alzheimer's, noting the researchers themselves flagged causation and persistence as open questions.Antivirals, vaccines and treatment options
Discussion turns to treatment: an infectious disease specialist asks whether daily antivirals reduce dementia risk, and users share experiences with suppressive therapy, a Chinese CRISPR trial, and vaccines.
5A daily probiotic powder taken for six months improved memory and thinking scores in older adults with early memory problems, and lowered a blood marker linked to Alzheimer's, in a small placebo-controlled trial. Researchers say it's early, but it adds to evidence that gut health affects your brain.
- A multistrain probiotic taken daily for 24 weeks by older adults with early cognitive impairment was linked to better cognitive test scores and lower blood levels of pTau181, an Alzheimer's marker, versus placebo. Results are preliminary and do not show probiotics directly reduce brain tau tangles, but they add to evidence linking gut health to brain health.
Fermented foods as probiotic sources
Commenters share experiences with fermented foods like kombucha, kefir, yogurt, and sourdough, and ask for probiotic brand suggestions. Others note the study's strains appear in common foods like kimchi and cultured dairy.Supplement regulation in the US
A commenter calls for better US supplement regulation after an OTC supplement harmed their liver. Replies blame profit motives, while another raises concerns about heavily patented strains and high consumer costs.Gut-brain connection
A commenter cites recent research showing the brain has its own microbiome that plays active roles in brain function and disease. Others broadly argue that overall organ health, including gut health, affects the rest of the body.
6Researchers Analyzing Health Records Found That People With ADHD Who Received Prescription Medication Had a Lower Risk of All-Cause Mortality, Including Deaths From Unnatural Causes, Suggesting That Treatment May Offer Important Health Benefits Beyond Managing ADHD Symptoms.
- ADHD is linked to higher mortality: a JAMA Network Open review of 19 studies covering over 15.9 million people found people with ADHD had 70% higher overall risk of death, 90% higher suicide risk, 50% higher injury risk, and 30% higher natural-cause risk. ADHD medication was associated with lower mortality, though the findings show association, not cause.
Personal experiences with medication
Many commenters describe ADHD medication as life-changing, improving their jobs, safety, education, and anxiety, and say untreated ADHD contributes to crashes, overdoses, and other harms.Confounding factors in the study
Commenters argue that people who take medication may be more engaged with healthcare, wealthier, and healthier overall, so the results may reflect those differences rather than the drugs alone.Barriers to diagnosis and access
Commenters criticize costly, complicated adult diagnosis, reliance on parental reports, and US insurance and financial barriers that keep many people with ADHD from getting treatment.
7People who scored higher on an intelligence test rated their own looks slightly lower, while optimistic, emotionally stable, and college-educated adults rated themselves better-looking. Researchers suggest smarter people may just be more realistic about their appearance (two studies, 1,000+ adults).
- People who rate themselves as more attractive tend to be male, hold a university degree, and show higher optimism and emotional stability. Religiosity and competitiveness also linked to higher self-ratings, while higher cognitive ability was linked to slightly lower ones. British participants gave lower self-ratings than other nationalities.
Depression and realistic worldviews
Commenters debate whether depression gives a more accurate view of the world. Some say it warps cognition, while others argue realism doesn't require depression and that cognitive distortions drive it.Education versus intelligence
Users dispute whether degrees signal intelligence. Many argue intelligence is multidimensional, hard to compare across fields, and that education often reflects opportunity rather than ability.Subjectivity of attractiveness
Critics call "looks" too subjective to measure small differences, though others note that averaged faces and cross-cultural research show substantial agreement on attractiveness.
8Human-caused climate change may have contributed to more than half of heat-related deaths across European cities between 2000 and 2025
- Human-induced warming has substantially increased heat-related deaths in 854 European cities. From 2000 to 2025, an estimated 430,365 heat deaths occurred, with about 233,626 (over half) attributable to climate change. Annual deaths rose from 9,720 in 2000 to 24,572 in 2025.
Weak wording of the headline
Commenters say "may have contributed" is far weaker than "did cause." Others reply that this is a science sub and the title adds no new information, since the link was always plausible.Holding industries accountable
Users debate whether oil and plastics industries can be held liable for deaths, citing the tobacco litigation precedent. Some argue regulations must change first, while others say responsibility is collective.Climate change's share of European heat deaths
A commenter cites modelled estimates that climate change's share of Europe's heat deaths rose from 39% in 2000 to 68% in 2025 across 854 cities. They call for cooling centers and shade.
9Study on ~2,000 US adults during the 2024 election found that political anger does not automatically translate to voting; instead, it depends on efficacy, or the belief people can influence a political outcome
- A new Michigan State University study published in PLOS ONE finds that political anger does not automatically drive voting. Surveying nearly 2,000 U.S. adults before the 2024 election, researchers found anger motivates nonviolent activism mainly when people believe they can effect change, while the angriest individuals were least likely to vote.
Apathy as a deliberate tactic
Commenters argue "both sides are the same" messaging and posts saying votes don't matter suppress belief in change. Others cite Hungary as proof that people can still oust entrenched rulers.Is voting worth it
One side says voting costs nothing and can only help. The other cites voter suppression, hard access, and disillusionment with bipartisan politics, and says abstaining can be a principled refusal.Single-issue voting and lesser evil
Users debate whether anger over Gaza justifies not voting when both candidates back Israel. Some call single-issue voting juvenile, while others argue a Harris win would still have changed broader outcomes.
10A 15-year study of 31 wild Bornean orangutan mother-offspring pairs found that mothers appear to facilitate social play by traveling farther and spending less time feeding, suggesting they prioritize their offspring’s social development despite the energetic costs.
Relatable humor about crowded spaces
A commenter jokes that sitting in a smelly gym filled with screaming kids makes them feel like an orangutan.Genetic basis for orangutan behavior
A commenter asks whether the study's behaviors are genetic, suggesting predisposed individuals had higher offspring survival, which would shift the population over generations.