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digest/Science/Tuesday, 19 May 2026

Tuesday, 19 May 2026

A World in Flux: Scientific Breakthroughs, Societal Shifts, and Environmental Challenges

Autism Treatment Claims and Family Beliefs

A study has revealed that many families embraced the notion of a new treatment for autism spectrum disorder (ASD) called leucovorin, following declarations made last September by President Donald Trump, Robert F. Kennedy Jr., and various health officials. This belief persisted despite a lack of scientific data substantiating the drug’s effectiveness.

Abortion Bans and Maternal Healthcare

State-level abortion bans are linked to a decline in access to evidence-based medical care for managing miscarriages. This situation forces more women to carry pregnancies that are not viable, potentially jeopardizing their health and fertility and prolonging their grief.

Political Affiliation and Economic Redistribution

White Americans who feel politically marginalized are less likely to support economic redistribution programs. This tendency is particularly pronounced when these individuals compare their political standing directly to that of racial minorities.

Increased Use of Ivermectin for Cancer

Following discussions by actor Mel Gibson on Joe Rogan’s podcast, prescriptions for ivermectin and another antiparasitic drug for cancer patients have significantly increased. A new study documents this surge in usage.

Air Pollution and Physiological Impacts

Short-term exposure to common air pollutants has demonstrated distinct negative impacts on both lung function and brain activity. Growing evidence suggests that long-term exposure to elevated levels of air pollution is associated with an increased risk of dementia.

School Environment and Teen Mental Health

Feeling a sense of belonging at school and having positive relationships with teachers are significant protective factors for teenagers' mental health.

ADHD, Rejection Sensitivity, and Emotional Distress

A qualitative study explored the relationship between ADHD and rejection sensitivity, finding that the anticipation of rejection causes greater psychological distress than actual instances of rejection. This can create a cycle of emotional masking, physical discomfort, and social withdrawal.

Political Rhetoric and Ideological Alignment

Scientists anticipated that both liberals and conservatives would be hesitant to endorse rhetoric associated with the opposing political side. However, liberals showed a stronger inclination towards this reluctance. Conservatives, on the other hand, appeared more willing to support causes aligned with their views, regardless of the framing used.

Rising Sea Levels and Coastal Agriculture

Coastal farmlands are being lost to saltwater intrusion at a rate twice as fast as forests, despite farmers' efforts to construct protective levees. A recent study indicates that over 25,000 acres of cropland in the Mid-Atlantic region have been submerged. The lack of resilience in annual crops compared to trees contributes to this vulnerability.

Student Well-being Decline After Transition to High School

A study found a decline in overall well-being across all measured domains – including happiness, optimism, perseverance, emotional regulation, cognitive engagement, and life satisfaction – among students transitioning to high school. Simultaneously, sadness and worry increased.

Global River Oxygen Depletion

A study reveals that 78.8% of global rivers have experienced sustained oxygen depletion over the past 40 years. Climate warming is identified as the primary driver, with tropical rivers being particularly susceptible to severe hypoxia.

AI for Stroke Risk Prediction

An artificial intelligence model called ECG2Stroke can predict the risk of a stroke up to 10 years in advance using a simple 10-second electrocardiogram (ECG) test.

Magic Mushrooms for Cocaine Addiction

A study suggests that psilocybin, the active compound in magic mushrooms, may be an effective treatment for cocaine addiction. Participants who received a single dose of psilocybin were more likely to abstain from cocaine compared to those who received a placebo.

Long-Term Air Pollution and Cognitive Health

Long-term exposure to air pollution from sources like traffic, industry, and wildfires is linked to poorer cognitive function and subtle but measurable brain damage. The effects appear to be more pronounced in women.

Dopamine Receptors and Brain Cell Migration

Scientists have discovered that dopamine receptors function as signaling mechanisms guiding the migration of brain cells.

Meat Industry and Nutrition Research

A meta-research review investigated the association of meat industry affiliation with conclusions in nutrition research.

Racial Resentment and Conservative Political Beliefs

Racial resentment plays a significant role in shaping conservative political beliefs among White Americans who are not religiously conservative. This resentment provides evidence of a conservative political shift within this demographic group, including White religious moderates, liberals, and non-religious individuals.

Next-Generation CAR T-Cell Therapy for Brain Tumors

In preclinical trials, a next-generation CAR T-cell therapy has successfully eliminated glioblastoma brain tumors. The treatment targets a protein called uPAR, which destroys both the cancer cells and the supportive infrastructure that fuels their growth.

Factors Influencing Engagement in Science Stories

Research indicates that vivid imagery and details about character motivations and emotions do not significantly enhance reader engagement with science stories. However, reader perceptions of story quality and emotional transportation do have a notable effect.

Biomimicry in Construction Materials

Inspired by the longevity of deep-sea sponges, a new 3-D printing technique combines layers of polymer and mortar to create a composite construction material that is 187 times more fracture-resistant than conventional concrete.

Global Obesity Trends

Between 1980 and 2024, obesity rates plateaued or slightly declined in several high-income countries. Conversely, obesity continued to rise in most low-income and middle-income countries, surpassing prevalence levels previously observed in wealthier nations.

Early-Career Researchers and Scientific Innovation

Analysis of millions of scientists reveals that early-career researchers tend to produce more "disruptive" science compared to their more experienced counterparts. This "nostalgia effect" can hinder scientific innovation by causing researchers to rely on past ideas.

Traffic Pollution and Kidney Disease

A decade-long study shows that traffic pollution increases hospitalizations for chronic kidney disease up to four times. Vehicle emissions (PM2.5) enter the bloodstream, triggering kidney inflammation and premature organ aging.

Post-Game Depression in Video Game Players

A study has identified a phenomenon known as "post-game depression," where many video game players experience feelings of emptiness and sadness after finishing highly engaging games.

China's Transition to New Energy Vehicles and Environmental Benefits

By 2023, the transition to new energy vehicles in China resulted in a 23.80% reduction in fine particulate matter (PM2.5) and a 30.67% reduction in carbon monoxide levels, preventing approximately 262,000 non-accidental deaths and 75,000 all-cause deaths.

Head Trauma and the Microbiome

Even mild blows to the head can disrupt the gut microbiome.

Exercise, Diet, and Alzheimer's Risk

An MRI study involving 600 Americans suggests that a healthy brain, maintained through exercise, a healthy diet, sufficient sleep, and cognitive challenges, may help protect thinking and memory skills from the early effects of Alzheimer's disease.

Substances and Criminal Behavior

Research indicates that different substances are associated with varying patterns of criminal behavior and police arrests. Psychedelics like psilocybin tend to be linked to lower arrest rates, while substances like PCP and GHB show strong correlations with violent and non-violent crimes.

Potential Atmosphere on a Distant Object

A small object beyond Pluto may possess a thin atmosphere, a first for objects beyond Pluto.

Shifting Political Affiliation of White-Collar Voters

Recent political discussions often focus on working-class voters leaving the Democratic Party. However, analysis indicates that over the past four decades, high-income, highly educated, and white-collar White voters have consistently shifted towards the Democratic Party.

Reliance on "News Will Find Me"

A significant portion of the population (one in three) indicates they do not rely on traditional news outlets like newspapers and television. Instead, they prefer information that "finds them" through algorithms and social networks, potentially increasing their vulnerability to misinformation.

Ant Navigation Using the Moon

Certain ant species navigate using a compass calibrated to the moon's position.

Glucagon-like Peptide-1 Receptor Agonists and Eye Health

A study published in Neurology explores the association between glucagon-like peptide-1 receptor agonists and the risk of nonarteritic anterior ischemic optic neuropathy.

Childhood Adversity and Trust

Growing up in a disadvantaged environment not only hinders cognitive development but also weakens an individual's inherent willingness to trust others later in life. While higher intelligence generally increases trust, early childhood adversity can reduce this benefit by half.

Declining Sleep Duration Among US Teens

US teenagers are sleeping less than ever before. Factors such as homework, social pressure, jobs, screen time, and social media contribute to this decline. Only 22% of older adolescents report sleeping at least 7 hours per night.

Dietary Approaches and Greenhouse Gas Emissions

A 16-week study comparing low-fat vegan and Mediterranean diets in overweight adults found that the low-fat vegan diet resulted in a 57% reduction in total greenhouse gas emissions and a 55% reduction in cumulative energy demand, while the Mediterranean diet showed a 20% reduction with no change in energy demand.

Genetic Variation and Aging Rates

A global DNA study reveals that an individual's genetic background can influence their aging rate. Ethnic origins leave a lasting mark on the immune system, metabolism, and gut bacteria, with East Asians outside of Asia exhibiting biological aging patterns older than those in Asia, and Europeans showing the opposite pattern.

Spinach-Inspired Technology for Dry Eye

Scientists at NUS have developed a light-activated technology inspired by the photosynthetic membranes of spinach plants to help keep the eyes continuously hydrated.

Consumer Debt Repayment Patterns

Researchers have identified a consistent pattern in consumer debt repayment: borrowers with multiple installment loans tend to pay off the oldest loan first, even if paying down a newer loan would result in greater interest savings.

Autism and Sexual Victimization Risk

Autistic adults face a higher risk of certain types of sexual victimization. Their sensory sensitivities and potential difficulty processing risk cues can make them vulnerable to predatory behavior.

Methylene Blue for Hair Follicle Regeneration

Research indicates that methylene blue protects hair follicle stem cells from oxidative and metabolic stress, potentially enhancing hair regeneration.

USAID Funding and Global Violence

The cessation of USAID funding led to a significant increase in global violence, including a 10% rise in protests and riots, a 6.9% increase in armed fighting incidents, and a 9.3% increase in battle-related fatalities. This increase began shortly after the aid stopped and remained elevated for several months.

Cannabis Use for Sleep

The CDC reports that approximately 4% of adults frequently use cannabis to aid sleep.

Degradation in Perovskite Solar Cells

A study provides an in-depth analysis of degradation in scalable wide-bandgap perovskite solar cells.

Average Sleep Duration in the US

The average adult in the US sleeps 7.6 hours per night, with a range of 6.5 to 8.9 hours observed in the 10th to 90th percentiles.

Post-Exposure Prophylaxis for COVID-19

A study in the New England Journal of Medicine examines the use of Ensitrelvir for post-exposure prophylaxis against COVID-19 in household contacts.

Human Walking Patterns in Train Stations

Researchers have discovered a peculiar tendency among people exiting train stations: they often follow the same walking path as the person directly in front of them, even if they do not know that person and if it leads to a longer travel time.

Increased Precipitation and Water Storage

More concentrated precipitation events are leading to a decrease in terrestrial water storage.

Pleiotropic Genetic Effects

Pleiotropic conflict refers to situations where a single genetic locus has antagonistic effects on different traits.