Teen marijuana use has hit its lowest point in over three decades, a new study reveals, defying concerns that legalization might spur a rise in use among young people. The University of Michigan’s ...

Cannabis use among older Americans has climbed dramatically, with 7% of adults 65 and older now reporting recent use. This rise isn't just in numbers but also in diversity older users today are more ...

Daily and near-daily marijuana use is now more common than similar levels of drinking in the U.S., according to an analysis of national survey data over four decades. Alcohol is still more widely used ...