The CDC now recommends that everyone wear a face covering when they go into a public place. But there's confusion about why and if this protects the wearer, people around them or both.

Using distance to avoid getting sick has deep evolutionary roots for humans and many other species.

Exponential growth, such as in a viral epidemic, starts deceptively slowly, then quickly balloons. A mathematician explains the importance of early action and the costs of delay.

Stress, loss, loneliness and isolation are key factors in clinical depression, which affects millions. The US was unprepared for COVID-19 – will it remain unprepared for its medical aftermath?

Stress, loss, loneliness and isolation are key factors in clinical depression, which affects millions. The US was unprepared for COVID-19 – will it remain unprepared for its medical aftermath?

Wild animals and animal parts are bought and sold worldwide, often illegally. This multibillion-dollar industry is pushing species to extinction, fueling crime and spreading disease.

The US is gradually shifting to lower-carbon energy sources, but the COVID-19 pandemic, an oil price crash and a likely recession are big speed bumps.

The time at home from the coronavirus crisis could be an opportunity to let our natural sleep rhythms take over.

A global pandemic is anxiety-provoking for most people. But modifying the way you perceive the situation can set you up to deal with it more effectively.

As the COVID-19 pandemic spreads, pregnant women are facing new health risks and a health care system that's changing around them by the day.