Marijuana is made from the shredded and dried parts of the cannabis plant, including the flowers, seeds, leaves, and stems. It’s also known as pot, weed, hash, and dozens of other names. While many ...

A prominent cardiothoracic surgeon has opened up about the potential harms of everyday habits and substances in a candid ...

If cannabis causes the munchies, how is it possible that pot smokers are thinner than nonsmokers? A new study published in the American Journal of Epidemiology finds an intriguing connection between ...

Texas’ medical marijuana program has been growing since state lawmakers approved its expansion last year. Here’s what you need to know about the drug, how it’s being used and what science says about ...

WASHINGTON, D.C. — Americans’ views of the effects of marijuana have worsened over the past two years, as slim majorities now say it negatively impacts both society as a whole (54%) and most people ...

Synthetic marijuana is very different from tetrahydrocannabinol (THC). It’s called K2, synthetic marijuana, and it has caused a cluster of deaths in Chicago. The Chicago Tribune reported three arrests ...

In part one of what marijuana really does to your brain, we traced the discovery of the cannabinoid receptor. Finding the receptor is the first step in determining how smoking causes a high. The next ...

Cannabis indica and Cannabis sativa are two types, or strains, of the cannabis plant. The dried leaves, flowers, stems, and seeds of cannabis are what make up marijuana, or weed. Cannabis plants have ...

Pew Research Center conducted this study to understand the public’s views about the legalization of marijuana in the United States. For this analysis, we surveyed 5,140 adults from Jan. 16 to Jan. 21, ...

Scientists want to create breathalyzers that show how recently a driver used marijuana. Researchers also are studying how cannabis impairs motor skills and reflexes for habitual and occasional users.