The more potent the pot is, the more likely a person who uses it is to become dependent on it, a new study from the United Kingdom finds.
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 receptor in the brain involved in the "high" feeling that people get from marijuana is revealed in a new, detailed, 3D image today.
As several U.S. states consider whether to legalize marijuana this upcoming election, support for legal pot is at its highest in nearly 50 years.
In states that have passed medical marijuana laws, pot use among adolescents and young adults has remained steady over the past decade, a new study finds.
With restrictions to cannabis loosening at the state level, research is badly needed to get the facts in order.
Marijuana may interact with other prescription medications. Here's a look at some of the drugs that are known to interact with marijuana.
Chelsea Clinton recently suggested that marijuana might be deadly when taken with other drugs. But is this really true?
The relationship between people's religiousness and their views on marijuana legalization is quite complex, a new study finds.
Smoking marijuana may increase the risk of experiencing an episode of psychosis, or a break with reality.
Smoking marijuana during pregnancy doesn't appear to increase the risk of preterm birth or other harmful birth outcomes, a new review study suggests.
Nearly 21 million Americans ages 12 and older had a substance use problem in 2015, according to a new federal estimate.
More people in the U.S. are using marijuana than in years past, and one reason may be that people think the drug as less harmful than people did in the past.
The federal government says more research on marijuana is needed before the drug could become legal. But studying marijuana is exceedingly difficult because the drug is illegal.
Live Science has rounded up the promising evidence that medical marijuana may help people with certain conditions.
The percentage of Americans who say they currently smoke marijuana has nearly doubled since 2013, a new survey finds.