By Priyanjana Pramanik, MSc. A massive nationwide study shows that lighting up before age 20 leaves a lasting cardiovascular ...

Traveling smoke from Canada's wildfires created an orange-tinged smog that shrouded New York City on Wednesday, obscuring its famous skyscrapers and causing residents to don face masks, as cities ...

Smoking tobacco is so harmful to the body that it changes a person's immune system, leaving them vulnerable to more disease and infection even years after they've quit, a new study found.Video above: ...

Three summers ago, the Caldor Fire burned its way up the Western Slope into the Tahoe Basin, scorching 221,835 acres. The fire burned for over two months, cloaking the lake and its surrounding ...