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.
Marijuana is an age-old drug made from parts of the Cannabis plant. It contains the mind-altering chemical tetrahydrocannabinol, or THC. Several countries, and a number of U.S. states, have legalized the drug for medical or recreational purposes. Here's the latest news on marijuana, from how it affects the brain and body, to its potential medical benefits or harms, to possible impacts of legalization.
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.
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.
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.
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.