More and more Americans are reporting near-constant cannabis use, as legalization forges ahead.

On a gray afternoon in early November, Samantha Miller supervised a handful of people in long white coats while they placed very delicate samples into very expensive machines.

Legalizing medical marijuana doesn’t increase recreational use of the substance among teens, according to a new study carried out by researchers at Columbia University’s Mailman School of ...

The Greens want to legalise cannabis for Australians over the age of 18, in a bid to take the drug out of the hands of criminal dealers. Senator Richard Di Natale argued his party's proposal would not result in the widespread sale and use of cannabis, and claimed there would be strict regulations on sale and production.

We take a fair look at some of the best counter arguments for legalization and see how they hold up in review.

The medical marijuana market is in a downward spiral as businesses, lured by big money, shift to recreational.

A teen who consumes alcohol is likely to have reduced brain tissue health, but a teen who uses marijuana is not, according to a new study. Researchers scanned the brains of 92 adolescents, ages 16 to 20, before and after an 18-month period.

December 14 was a very bad day for 29-year-old Jersey City resident Marquis Diggs.

For people suffering from bipolar disorder, relief from the condition might be as simple as smoking a little marijuana. New research reveals that cannabis use among patients with bipolar 1 disorder showed an improvement in their "cognitive functioning."

This track is featured in the epic weed burning level in the hit game Far Cry 3.

Changing times prompt a question: What is the etiquette on marijuana usage?

Smoking pot in the Netherlands is now a city-by-city choice for tourists.

Revisiting data casts doubts on link between heavy cannabis use and declining IQ.

Despite the fact that an estimated one million patients use marijuana as medicine every year, the U.S. has restricted research on marijuana. In other words, we don't know conclusively what its dangers and benefits are. 

Reps. Earl Blumenauer and Jared Polis to introduce bill Tuesday to end prohibition

In marijuana, labor has found a growth industry. The Obama administration has other ideas.

Rep. Earl Blumenauer explains to Salon why his legalization bill may succeed where others have failed.

Josh Harkinson considers the environmental impact of grow sites in California’s Humboldt County.

Czech President Vaclav Klaus has signed into law legislation that makes it legal in the Czech Republic to use marijuana for medical treatment. Klaus gave his approval on Friday, after the law had been approved by both houses of Parliament.

How the popularity of the cannabis derivative hash oil -- and the apartments of people who try to make it improperly -- are blowing up across the U.S.

Opponents of marijuana prohibition had one heck of a year in 2012, as voters in both Washington and Colorado passed ballot initiatives legalizing recreational use of the drug.

Compressed-air gun mounted on truck could throw 13-kilo packets over fence into California.

The bottom guy is so stoned!

New polls and votes suggest growing support for the repeal of pot prohibitions.

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Asa Hutchinson, a former Administrator of the U.S. Drug Enforcement Administration, on Tuesday refused to say why marijuana shouldn’t be taxed and regulated like alcohol.

Might want to delete that before it hits the internet.... oh wait...

Sen. Clayton Hee says the bill is designed to reduce the backlog in the criminal justice system. Law enforcement officials oppose the bill and say that decriminalization would make it harder to enforce the law against the drug.

The NYPD spent 1 million hours making 440,000 arrests for low-level marijuana possession charges between 2002 and 2012, according to a new report released Tuesday -- just as legislative leaders in Albany are deciding whether to pass a bill reforming drug laws. The Drug Policy Alliance and the Marijuana Arrest Research Project, pro-drug law reform groups that commissioned the report, said its findings show a "huge waste" of police resources.

In the eyes of the federal government, there is no such thing as “medical marijuana.” But there’s a dispensary just blocks from the Capitol.

More than 200,000 marijuana-scented cards are being sent out to help educate the public on the smell of cannabis.

In November, two states decisively legalized marijuana. Campaigners think the U.S. is ready to follow them, and they're planning how to change laws in the rest of the country.

Twelve years ago, Portugal eliminated criminal penalties for drug users. Since then, those caught with small amounts of marijuana, cocaine or heroin go unindicted and possession is a misdemeanor on par with illegal parking. Experts are pleased with the results.

Marijuana tax: Some states are looking to legalize and tax marijuana to help alleviate fiscal woes, a report said.

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