Yale researchers conducted the first nationwide study linking  AC usage — not just ownership — to heat related mortality risks and found AC usage cut the amount of annual heat-related deaths by half in the U.S, saving more than 5,000 lives a year.

As dogs age, many develop more than one chronic health condition. New research from the Texas A&M College of Veterinary Medicine and Biomedical Sciences (VMBS) shows those conditions can dramatically shorten a dog’s lifespan, highlighting the importance of managing multiple diseases together rather than individually.

In a recent study published in GeroScience, researchers with the Dog Aging Project found that dogs with five or more chronic diseases were more than twice as likely to die as dogs living with only one diagnosed condition, regardless of their age or size. The findings suggest that, as in humans, chronic diseases interact in ways that make their combined effects more harmful than each condition alone.

Aerosols have a profound influence on air quality, human health, clouds, and climate, but new particle formation in the atmosphere has remained a scientific conundrum. Large fractions of airborne fine particulate matter consist of secondary organic aerosols (SOA) formed by gas-to-particle conversion of organic precursor molecules in the atmosphere. The growth rates of these atmospheric nanoparticles, however, have remained enigmatic: they are often smaller and less dependent on condensable vapor concentration than expected. Growth rates observed in field measurements are fairly uniform around 1–10 nanometers per hour. This growth is only weakly dependent on vapor concentrations that can vary by multiple orders of magnitude.

About the Study: This cross-sectional study suggests that seeking emotional support from generative AI is a unique marker of psychological distress in children and adolescents, independent of mattering or loneliness. Clinical frameworks and digital literacy programs should distinguish between functional AI assistance and the use of algorithmic interfaces as a digital refuge for emotional needs.

A new study in Nature Health suggests that delays are no longer necessary, offering the opportunity to assess whose health is most at risk, take protective measures, and test whether interventions are working while the heat season is still underway.