Decades of research suggest that if a smoker watches someone else light up a cigarette, it will likely increase the smoker’s urge to light up themselves. Seeing someone use an electronic cigarette may have the same effect.

A person’s outlook on life and on other people can affect their mental and physical health.  A negative outlook may be linked to dementia, which is a bigger problem among older people than younger ones.

The Boston Marathon bombing led to a large-scale manhunt rarely seen in the US. Hundreds of families were required to shelter in place while it continued.

One of the reasons cigarette TV commercials left the airwaves was their market appeal to youth. It's unclear whether that may be the fate of e-cigarettes as well.

There's a common expression: "It’s never too late to learn." When it comes to the benefits of learning another language, this expression seems to hold true.

In recent years, pharmaceutical companies have put safeguards on medications to make it harder to abuse certain prescription painkillers. But those changes may be leading some to use illegal drugs.

A patient being treated at an intensive care unit (ICU) is likely at their most vulnerable point on the road to recovery. And one common ICU treatment could potentially have long-term side effects.

As cities continue to crack down on people lighting up cigarettes and public health efforts highlight the dangers of tobacco use, e-cigarettes are seen as a possible way to help people quit.

Widespread public education and law enforcement efforts warn of the dangers associated with driving under the influence of alcohol. But new research suggests there's another growing problem to be aware of while on the road.