Research suggests cannabis suppresses REM sleep, raising questions about memory, emotion and the purpose of dreams.

California is conducting a major study on cannabis-impaired driving, the first of its kind in nearly 40 years, to improve law ...

Research suggests people who often use cannabis start their day with higher cortisol levels than people who don't, indicating ...

A new study by McGill researchers could help explain why people who have quit smoking remain at elevated risk of lung disease ...

Lung cancer is the leading cause of cancer death in American women — and a growing share of new cases are in women who've ...

Summer is in full swing, and that means bringing cannabis outside with you. Warm weather changes the way people smoke weed.

Wildfire smoke, which is increasing in the Northern Hemisphere as the climate warms, attacks nearly every system in the body.