Marijuana

Cannabis, the source of marijuana, originated in northwest China, where local strains are most like the original strain of cannabis cultivated more than 12,000 years ago.

Can you trust an eyewitness while they're high, or should you wait until they sober up?

The cookie was brought to the woman's senior center by a person of "questionable character," according to a new report of the case.

The findings add to a growing body of research linking marijuana use to an increased risk of cardiovascular problems.

Summer is the most common season for U.S. teens and adults to try illegal or recreational drugs for the first time, a new study finds.

But do not try to treat an infection with CBD at home.

A small study suggests that the marijuana compound cannabidiol (CBD) may reduce cravings in those with heroin addiction.

A group of researchers in the Netherlands tested the substance's effects on 17 healthy volunteers in the lab

People who use high-potency marijuana on a daily basis may be at increased risk for developing psychosis.

A new study suggests that marijuana’s main active ingredient, THC may be more important for therapeutic effects.

Here's why public opinion has changed dramatically in favor of pot legalization.

A marijuana lollipop with a very high dose THC may have triggered a man's heart attack.

The findings contradict previous research, but they are far from conclusive.

Smoking pot just once might be linked to changes in young brains

Recreational marijuana use is becoming increasingly legal across the U.S., but that doesn't mean that it's safe.

17 willing participants got very, very high for science — and they found vaping weed is way stronger than smoking it.

How did we end up with THC and CBD in the first place?

A woman who frequently ended up in the hospital with intense bouts of vomiting turned out to have a mysterious syndrome tied to heavy marijuana use.