Time Magazine has called it "the most horrible drug in the world," and last month, it hit the US. Because seriously, why would you take a drug that rots your flesh, bones, and brain?! Hank Green discusses the science behind the street...

Hank explains the science behind the effects of that wackiest of weeds, cannabis sativa - aka marijuana.

Lenny and Amy’s 5-year-old son has epilepsy. When conventional medications caused terrible side effects, they started giving him a daily drop of cannabis oil, with dramatic results. But it’s a calculated risk: While there is anecdotal...

Lenny and Amy's 5-year-old son has epilepsy. When conventional medications caused terrible side effects, they started giving him a daily drop of cannabis oil, with dramatic results. But it's a calculated risk: While there is anecdotal...

Millennials are increasingly reevaluating their relationship with alcohol. A movement known as “sober curious” is gaining popularity with these young adults, who are questioning both the physical effects of alcohol and the way drinking...

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. Is the War on Drugs doing more harm than good? In a bold talk, drug policy reformist Ethan Nadelmann makes an...

Time Magazine has called it "the most horrible drug in the world," and last month, it hit the US. Because seriously, why would you take a drug that rots your flesh, bones, and brain?!

35,000 walruses all hanging out at the same beach in Alaska? Why? Does global warming have anything to do with it? And what have we learned after 20 years of studying the effects of marijuana? SciShow News explains.

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. In 2012, Colorado legalized cannabis and added to what has fast become a multibillion-dollar global industry for...

After a good distance of running, you might have felt a sensation of happiness. That is the runner's high and some chemicals in your body cause it.

Warning: Contains talk of cannabis.<br/>
CBD: Marijuana Without the High

Hank explains the science behind the effects of that wackiest of weeds, cannabis sativa - aka marijuana.

Khadijah Tribble eloquently describes how marijuana reform is necessary to end the destructive war on drugs. Differential enforcement of marijuana drug laws have led to ongoing, systemic social and economic inequity. Tribble suggests...

SciShow News delves into the history of marine animals and finds that they’re getting bigger, and unlocks the secret of how cannabis creates one of its most medically useful effects.

(NOTE: This talk was given in 2009, and this field of science has developed quickly since then. Read "Criticisms & updates" below for more details.) Drug-resistant bacteria kills, even in top hospitals. But now tough infections like...

In 1970, marijuana was classified as a schedule 1 drug in the United States: the strictest designation possible, meaning it was completely illegal and had no recognized medical uses. Today, marijuana's therapeutic benefits are widely...

E-cigarettes and vapes have exploded in popularity in the last decade, especially among youth and young adults -- from 2011 to 2015, e-cigarette use among high school students in the US increased by 900 percent. Biobehavioral scientist...

Yesterday's election results have a lot of impact on health care in the United States. The new Democratic House of Representatives and the ACA, expansion of Medicaid in red states, and medical and recreational marijuana are all affected...

A look at marijuana laws across the United States.

Howcast - Learn how marijuana is regarded and used in countries other than the United States in this Howcast video.

Howcast - Learn how to talk to your friends and family about medical marijuana use in this Howcast video.

Howcast - Learn what the research says about medical marijuana in this Howcast video.

Howcast - Learn if marijuana cures glaucoma in this Howcast video.

Howcast - Learn who should not use medical marijuana in this Howcast video.