Farmers in the U.S. have grown cannabis since the 1600s — but policymakers are still figuring out how to regulate two famous types of Cannabis sativa. A historian calls the plant "incredibly cryptic."
President Trump set the process in motion to ease federal restrictions on marijuana. But his order doesn't automatically revoke laws targeting marijuana, which remains illegal to transport over state lines.
Drinks infused with cannabis' buzzy compound THC are wildly popular and available in many states. But a year from now, the hemp-based products could be banned under a newly approved federal law.
It's trendy in some circles to replace drinking with consuming cannabis. But can it help people with a drinking problem cut back? Scientists set up a bar in the lab to find out.
Millions of Americans use weed to treat chronic pain, but there's little high quality research on whether it works. New findings suggest it can be effective for low back pain, on par with opioids.
With no help from the federal government, states are trying to regulate recreational marijuana. California's Department of Cannabis Control works to keep contaminants out of joints, vapes and edibles.
Millions of Americans use cannabis and would like to think the products they buy are safe. But regulation is state by state and full of holes. NPR's new series digs into the risks and solutions.
Voters in three states will decide whether to legalize recreational use. Earlier this year, Pew reported that 88% of U.S. adults said marijuana should be legal for medical or recreational use.
The Georgia Department of Public Health has rolled out several changes to the how patients can access state’s medical cannabis cards. Advocates are responding to the changes.
