A million years of marijuana: How cannabis became our favourite weed

Cannabis was one of the first crops that humans cultivated about 12,000 years ago. But medicinal and psychoactive uses are much more recent

As marijuana use grows, researchers want to know how it affects the heart

Reefer madness? Study appears to dispel theory of spike in teen marijuana use in states where it's legal - ABC News

Weed is stronger than ever, but it might not affect our brains that much: 6 surprising facts about cannabis

Breaking Down the Cannabis Plant

New York's weed laws mean marijuana is legal but the stores selling it aren't yet - Vox

Cannabis - Wikipedia

Cannabis in the seventies, a decade of change- Alchimia Grow Shop

New Study: Marijuana Users Three Times More Likely To Develop Peripheral Artery Disease

Recreational Marijuana - Pros & Cons - ProCon.org

Three Big Reasons Marijuana Is Misunderstood - Dr. Kevin Hill