Suicide rates in the US are at a 80-year high. An expert on college student mental health explains risk factors and the role of inequality.

Smoking shrinks the size of your brain. Quitting smoking prevents further loss of tissue, but can't restore the brain to its original size.

Researchers studying "pragmatic actions" have some timely findings about what we learn when people shake their presents.

The loss of the so-called "happiness" chemical, serotonin, may contribute to memory problems, including Alzheimer's disease.

Infants have new protections against respiratory syncytial virus (RSV), but availability is limited. Two experts discuss what you should know.

Human activities are making Earth's air, soil, and freshwater saltier, which could pose an existential threat if current trends continue.

Climate refugees are predominantly from formerly colonized countries that aren't responsible, in large part, for the factors that exacerbate climate change.

Unfiltered air from rush-hour traffic significantly increased passengers' blood pressure, both while in the car and up to 24 hours later.

More older Americans use cannabis now than before the pandemic, with 12% saying they’ve consumed a THC-containing substance in the past year.

A combination of antibiotics is more effective in treating Lyme disease than the commonly prescribed course of a single antibiotic alone.